The catalyst for catalytic treatment of exhaust gas

 

(57) Abstract:

The invention relates to a device for cleaning exhaust gas. The catalyst for catalytic treatment of exhaust gas has a body, the inlet device and the discharge device. The body contains the catalytic means with at least two packets of sheet elements. The inlet device is reported to lie between packets with an internal cavity and has at its mouth the same cross-sectional shape and the same dimensions of the cross section, the inner cavity. The latter has at least one spare area, the cross-sectional area which decreases in the direction from the inlet of the device. The exhaust device connected to an external cavity located between the inner-surface parts of the body and catalytic means. Each package of sheet elements limits the passages that diverge in cross section in different directions from the inner cavity to the outer cavity. It allows a good fit the shape of the hull to the place. In addition, the catalyst has a good wind, and cold-starting properties and can be manufactured economically. 23 C.p. f-SS="ptx2">

The catalyst, in particular, is provided in order formed in a gasoline internal combustion engine of a motor vehicle, such as a car, or perhaps in another internal combustion engine exhaust gas to be cleaned and/or cleaned, i.e., free from harmful substances, catalytic processing by transformation of harmful substances due to chemical reactions.

Known catalysts for processing the exhaust gas have a housing with an inlet device, and with a venting device for exhaust gas. The body contains the catalytic funds with a catalytic body, often called the carrier of the catalyst, with passages for the exhaust gas or with multiple catalytic bodies through which the catalyst gas flows sequentially. The surface bounding the passages provided with a coating with catalytically active material with at least one noble metal.

Many of these known catalysts have the disadvantage that the exhaust gas flowing through the suction device, is distributed only via a small inlet for the exhaust gas catalytic surface (rabotavshiy gas between the inlet device and the catalytic (or the first catalytic) body and/or in the past at the beginning of the work gives to the environment relatively quickly a large amount of heat through the casing wall. If the exhaust gas is distributed only via a small inlet for the exhaust gas to the surface and/or distributed by it only irregularly, this increases the pressure drop or back pressure and causes the same reduction in efficiency and thus increases the required volume of the catalytic body, the need for noble metal, as well as production costs. Quick and great heat the catalyst has the effect during the cold start of the internal combustion engine and a catalyst that requires a relatively long time before catalytic or, respectively, each of the catalytic body reaches the temperature required for efficient processing of exhaust gas.

In EP-A 0 514 326 disclosed various catalysts, which are already largely eliminate the above-mentioned disadvantages. From this publication it is known, for example, catalysts with a housing having a shell containing a catalytic means with the annular catalytic body. The latter consists of an annular sheet-metal elements. Following one after the other sheet elements have mutually intersecting corrugations. Sheet cell battery (included) is in leaf elements and at their ends are welded to a flat plate or accordingly, the wall of the housing. The housing bore is connected with the inner cavity surrounded by the inner side surface of the catalytic body. Another housing bore connected to an external cavity between the shell casing and the outer side surface of the catalytic body. Catalytic body has passages leading from the inner to the outer cavity, evenly distributed along the periphery of the outer side surface. Of the shell and the lateral surface of the catalytic body of these known catalysts in cross section have a circular or oval in shape and have dimensions in the cross section that is substantially greater than the axial dimensions of the shells or, respectively, the catalytic phone

Annular sheet items of these known catalysts during their manufacture, as a rule, are of rectangular plates or strips of sheet metal. This produces a relatively large waste of sheet metal, more expensive production of catalysts.

If the catalysts should be embedded on the underside of the car, then often there is only little space. From the point of view of space, the possibilities for different types of auto cases it may be desirable to perform the cowling relatively flat shape in cross section and, therefore, with the relatively small sizes of shells in cross-section in comparison with the amount of exhaust gas that is to be processed. In other cases it may be advantageous to execute a shell of approximately triangular form in cross section. Further, in some cases, it would be advantageous if the maximum size of the cross-section of the shell would be less than its length.

In the known catalysts, catalytic funds or catalytic body which have a sheet items and passages leading from the inner cavity to the outer cavity, the surface area of the cross section of the passages increases from the inside out. This can increase the need for catalytically active noble metal and consequently production costs.

Known from FR-A 2 617 903 catalyst has a body placed in it catalytic means, and has an internal cavity located at least partially between the regions of catalytic funds, and external cavity located between the catalytic means and at least a part of the body, and catalytic means are leaf elements, restricting passages leading from notingham plate element has an elevation.

The length of the inner cavity of this known catalyst is substantially greater than its diameter. Therefore, the gas flowing during operation via the input device into the internal cavity forms a jet, which changes direction only when the collision with the plate. The density of the flow of exhaust gas flowing through the passages catalytic means, therefore, near the inlet, substantially less than near the opposite end of the catalytic means. Such non-uniform gas flow through the catalytic funds results in a poor use of catalytically active material, so that the catalyst becomes more and more expensive, than he would be at uniform gas flow through the catalytic means. Moreover, in the inner cavity arise turbulence, which increases the pressure drop of the current through the catalyst of the exhaust gas. In the manufacture of a conical sheet items of the plates or strips of sheet metal formed to the same lot of waste. Further, time-consuming to form a conical sheet items with corrugations or protuberances. According to the last cited publications, sheet elements could be connected with each other or with the options relate to each other at least partially, only linear ridges of corrugations or point of the peaks of the protuberances and also have a coating, it would be, however, very difficult and time consuming to weld all leaf elements in pairs with each other. Besides sheet items, despite such point of connection, you can still relatively hard to deform and move with respect to one another. As sheet items when the catalyst is exposed to vibrations and accelerations, as well as temperature change, there is a great danger of damage to the sheet elements and first of all their coverings.

The basis of the invention lies in the task of creating a catalyst that eliminates the disadvantages of the known catalysts which in particular forms, as well as the size and catalytic funds can be well adapted to the available space, and the catalyst, even when a relatively large axial dimensions catalytic funds, and the internal cavity should provide a uniform distribution of exhaust gas through all the passages of the catalytic funds, small pressure loss, good starting quality, stable connection of sheet items and economical manufacture.

This task is solved in that in the catalyst for catalytic treatment of exhaust gas I at least partially between the regions of the catalytic means, and external cavity located between the catalytic means and at least a part of the body, and catalytic means are leaf elements, restricting passages leading from the inner cavity to the outer cavity, and at least one leaf element of each pair adjacent to each other plate element has exaltation, catalytic means have at least two packages of sheet elements belonging to the same package of sheet elements define adjacent parallel plane fit, and limited different packages passages diverge in different directions from the internal cavity.

Different packages of sheet elements at least at the ends of the passages opening into the external cavity are at a distance from each other, which is substantially greater than the distance between adjacent with each other belong to the same package of sheet elements.

Referring to one and the same package adjacent to each other sheet elements relate to each other in planes fit.

Each package has the following in alternation to each other, the first sheet items, with exaltation, and second,the first element of the corrugations parallel to each other.

Each leaf element has a projection that is perpendicular to the adjacent to the corresponding sheet element plane fit, two straight parallel one to another region.

Each leaf element in the projection has the shape of a rectangle and two other straight lines parallel to one another territory.

Different packages are contiguous with the inner cavity of the inner surface, together covering the inner cavity cross-section in the main completely and without gaps.

Each package of sheet elements has one flat, adjacent to the inner cavity, the inner surface and one flat, parallel thereto and adjacent to the external cavity, the outer surface, and passages have a mouth lying in the inner surface and outer surface.

Catalytic funds have three or four adjacent to the internal cavity of the package sheet items.

Inlet device facing the inner cavity of the inner space and an exhaust device connected to the external cavity internal space, the internal cavity has at least one adjacent to the catalytic means the STS, the inner space of the inlet at its opening into the internal cavity of the mouth is generally the same cross-sectional shape and generally the same dimensions of the cross section, the inner cavity.

The cross-sectional area is free or, respectively, each open area of the internal cavity mainly along the whole of its size in the direction away from the inlet in a generally linearly decreases with distance from the inlet.

The inner space of the inlet, and the inner cavity has published in the past the mouth of the inner space of the inlet cross-section to form a polygon.

On the end wall having an aperture, fixed nozzle, which has an outer cylindrical section and extending towards the inner space segment, hole together with the nozzle forms the inlet device.

The inner space of the inlet, at the mouth facing the inner cavity is rectangular in shape.

The inner space of the inlet, and the inner cavity has published in the past the mouth of the inlet usaste inner surface, approaching one another in the direction away from the inlet.

Catalytic means define an axis, the packages have parallel adjacent to the inner cavity of the inner surface, the inner cavity is located limiter and with opposite him the inner surfaces of the limits at least one spare area of the internal cavity, the limiter is coming in a direction away from the inlet to the inner surface.

The body is a shell, the first end wall, second end wall, the inlet device in the first end wall, the outlet device at the second end wall.

Between the inner surfaces of the first lateral or longitudinal walls of the casing and turned to him first side surfaces of the catalytic bodies are intermediate space forming together with existing between the inner surface of the second end wall of the casing and the end surfaces of the catalytic tel intermediate space external cavity.

Between the shell and catalytic means has an external cavity, completely covering the catalytic means.

The inlet device is rigidly and tightly connected with the walls of the casing pipe, which acts covered by the housing inner space, catalytic means mounted on the pipe and are located on all sides at a distance from the walls of the casing, the inlet device communicates with the internal cavity.

Sheet elements have a coating of catalytically active material, each leaf element has at least one flat clamping area adjacent to the flat clamping section of another sheet element and/or element holding means adjacent one to the other pressure parts and elements are rigidly connected one with the other.

The invention is illustrated in the drawing, where Fig. 1 is a longitudinal section through the catalyst, the catalytic funds which have two V-shape located catalytic body, each with one group of passages; Fig. 2 is a longitudinal section along the line II-II of Fig. 1 through shown in this figure, the catalyst of Fig. 3 is a cross-section along the line III-III of Fig. 1 through shown in this figure, the catalyst of Fig. 4 is an isometric view of the catalytic body of catalyst funds catalyst shown in figures 1-3; who, 6 is a cross-section along the line VI-VI of Fig. 5 through shown in this figure, the catalyst of Fig. 7 is a longitudinal section of another catalyst, catalytic funds which have two groups of passages; Fig. 8 is a section along the line VIII-VIII of Fig. 7 through shown in this figure, the catalyst of Fig. 9 is a section along the line IX-IX of Fig. 7 through shown in this figure, the catalyst of Fig. 10 - section, corresponding to figure 8, through another catalyst; Fig. 11 is a longitudinal section through another catalyst; Fig. 12 is a simplified isometric view of a catalyst according to Fig. 11, with the housing shown only the outline of the shell; Fig. 13 is an isometric view of parts of a catalyst, catalytic funds which have three groups of passages; Fig. 14 is an isometric view of parts of the catalyst of the catalytic means, having four groups of passages; Fig. 15 is a longitudinal section through another catalyst; Fig. 16 is a simplified view in isometric on catalyst funds catalyst shown in Fig. 15; Fig. 17 is a view of the catalytic means according to Fig. 16 in the direction shown in the figure by the arrow XVII, and shows also the shell; Fig. 18 is a cross-section through shown in figures 15-17 is asanam in Fig. 16 arrow XIX of Fig. 20 is a view of the catalytic means with sheet items, with the convexity of Fig. 21 - section along the line XXI-XXI of Fig. 20 in an enlarged scale.

It should be noted that various shapes quite schematized and partially shown not to scale..

The catalyst 201 shown in figures 1-3, has an axis 202 and the housing 203. The body contains the shell 204, the first end wall 205 and the second end wall 206. Shell 204 covers the axis 202, passes along the last and generally parallel to it. Shell 204, for example, formed from one solid piece of sheet metal, the edges of which are parallel to the axis, are connected to each other firmly and tightly by means shown in Fig. 3 seaming. The edges of the end walls 205, 206, for example, are also joined by sealing the edges of the shell 204.

Shell 204 has a cross-section perpendicular to the axis, a rectangular shape, and the corners of the rectangle are replaced by smooth transitions. The shell forms a first two opposite one another, the lateral and/or longitudinal walls 204a and two second opposite one another, the lateral and/or longitudinal walls 204b. Four belong to the shell side or longitudinal walls are mostly not what has passed between both the first side and/or longitudinal walls 204a and through the axis 202; marked on Fig. 3 figure 209, the average plane identical with the plane of the cross section of Fig. 2. The housing 203 and the sides have a first size in cross-section, measured perpendicular to this Central plane 209, and the second dimension in cross-section, measured parallel to the specified mid-plane, which is smaller than the first size in cross section.

The end wall 205 and 206 in a generally flat and perpendicular to the axis 202 and form shape corresponding to the cross-sectional shape of the shell. The first end wall 205 has a first hole 205a. The second end wall 206 has a second hole 206a. On each end wall of the fixed tube, and it is welded to the rim of the limiting hole 205a, or, respectively, 206a. Each pipe has an outer cylindrical section and extending towards the inner space of the casing segment. Both openings 205a, 206a is formed with inlet device 207 or, respectively, the outlet 208 of the catalyst. The input device 207 and the discharge device 208 coaxial axis 202.

The housing 203 contains a catalytic tool 210 with two catalytic bodies 211, of which one pokazanych will be more clarified - at least the flat surfaces, namely surface of the lower base 211a, her parallel to the upper surface of the base 211b, the outer surface 211c, her parallel to the inner surface 211d, the first end surface 211e and parallel a second end surface 211f. Both pritvorenih catalytic body 211 are shown in Fig. 1 section similar to the lower grounds 211a and the upper base 211b, the oblique form of a parallelogram with different length edges. The inner and outer surface 211c or, respectively, 211d rectangular shape and connect each long edge of the bottom long edge of the upper base. Both end surfaces, 211e, 211f connect each short edge of the bottom short edge of the upper base.

Each catalytic body 211 has a package alternately follow one another, the first plate element 213 and the second plate element 214. Further, each of the catalytic body has a holding means with the spacer elements 215, holding together sheet items. Each leaf element and the retaining element consists, for example, from separate blanks. Sheet elements 213, 214 have the same plan contarello, oblique parallelogram.

Each first sheet element 213 has a main section 213a, provided with corrugations 213b, which extend parallel to each other and parallel to the end surfaces 211e, 211f from the outer surface 211c to the inner surface 211d. Combs 213c and 213d of corrugations 213b each of the first sheet element 213 define a plane parallel to the bottom base 211a, and the upper base 211b contact surface. Accordingly, all the flat contact surface defined by the first sheet elements, parallel to each other. The height of the corrugations, measured from crest to crest of the corrugations is preferably not less than 0.3 mm and, for example, from 0.5 to 1 mm Length of the corrugations may be equal to the height of the corrugations. Each leaf element 213 is on the opposite of each other party of its main section 213A, namely, at the end surfaces 211e, 211f along the corrugations parallel to the last Prosobranchia pinch flat areas 213e or, respectively, 213f.

Every second leaf element 214 at least mostly flat. The bottom 211a and the upper base 211b catalytic body 211 may, for example, be formed each second sheet element 214 or the upper base or the upper base catalytic body of the second plate element to the crests of the corrugations adjacent the first sheet element 213 and all other second sheet elements the crests of the corrugations of two adjacent first plate element 213. Every second leaf element 214 is on the opposite of each other party of its main section 214a prooobably, also flat clamping section 214e or, respectively, 214f.

Each spacer element 215 consists of a straight piece of rectangular cross-sectional profile of the rod. If you don't count sheet elements forming the top and bottom of the catalytic body, the clamping sections 213e, 213f, 214e, 214f first and second sheet elements 213, 214 pairs are bonded directly to one another. Spacers 215 extends along the length of the corrugations and are located between the clamping sections 213e and 214e or, respectively, 213f and 214f.

Sheet elements 213, 214 are, for example, of steel. Both turned in the opposite side surface of the main section 213a, 214a each sheet element 213, 214 provided with a coating of aluminum oxide. For coating of aluminum oxide deposited catalytically active material having, for example, platinum and/or rhodium. Pressure areas 213e, 213f, 214e, 214f sheet elements preferably clean and uncovered, so that their surfaces are made of steel. Spacers 215 A aluminum and catalytically active material.

Adjacent to each other pressure areas 213e, 214e, 213f,0 214f and spacers 215 are connected to each other rigidly, but it is welded. Adjacent to each other are the main areas of sheet elements 213, 214 limit along the passages 217, stretching as corrugations 213b, from the outer surface 211c, to the inner surface 211d. Both surfaces 211c, 211d is formed, therefore, the outer or inner mouth surface passes. Each catalytic body 211 has, therefore, a group of straight, parallel to each other and to the surfaces 211a, 211b, 211e, 211f and passing through between them passages 217. Each passage 217 is the cross-sectional area that is constant along its length. With the exception of passages bordering spacer elements 215, all the passages have the same equal cross-sectional area. Next, all the passages are of the same length.

As already upomyanalos, bottom base 211a and the upper base 211b each mainly privorotnogo catalytic body 211, for example, formed each second sheet element 214, and accordingly is mostly flat. However, it is also possible that at least one of the most remote from each other listed lower base and/or the upper base catalyst refers to a flat contact surface, adjacent to the outer crests of the corrugations of the respective outer sheet element.

The bottom 211a and the upper base 211b each catalytic body 211 is turned to one of the second lateral and/or longitudinal walls 204 in the above explained sense - mostly flat and parallel to the second lateral or longitudinal walls 204b. Both catalytic body 211 adjacent their lower base 211a and upper bases 211b, for example, according to the figures 2 and 3, each one of the two second, wider lateral and/or longitudinal walls 204b housing 203.

Surface 211c, 211d, 211e, 211f both catalytic bodies 211 perpendicular to the bottom base 211a, to the upper base 211b and the second, broader lateral and/or longitudinal walls 204d of the housing. The first outer surface 211c and the first end surface 211e form with each other is indicated in Fig. 4 letter alpha angle other than 90oconstituting at least 45opreferably at least 60oand, for example, from 75o87o.

Both catalytic body 211 firmly attached, for example welded, with the first end surfaces 211e sections of the end wall 205, located on protivoaritmicheskih tel 211 facing in opposite directions from each other and turned to one of the first lateral and/or longitudinal walls 204b. Both the inner surface 211d both catalytic bodies facing each other and converging with each other in the direction away from the inlet 207. Surface 211c, 211d is formed with passing along axis 202 average plane 209 angle equal to the difference between the 90ominus alpha and, therefore, constitutes at most 45opreferably at most 30ofor example from the 3o15o. Both catalytic body 211 tightly and firmly connected to each other, for example welded directly and/or through connecting the connecting member, the opposite from the inlet 207 end surfaces 211f. Consequently, both the catalytic body form shown in Fig. 1 section collectively, the "V" and are mirror symmetrical to each other relative to the passing between the mid-plane 209.

Named first and the second dimension of the shell 204 in cross-section, and the maximum measured between diagonally opposite each other in the corners of the shell 204, and the entire body, the size of cross-section less than the length of the shell 204. Similarly, all similarly measured perpendicular to the axis 202 dimensions in the cross section of the catalytic cresanto or accordingly, the passage inlet 207 is communicated from the first hole 205a housing 203 with existing between the inner surfaces 211d both catalytic bodies 211, polygonal cross-section, namely rectangular, the inner space 221. The inner space of the inlet 207 from his mouth, leading into the inner cavity 221 has a rectangular cross-sectional shape and dimensions shapes or cross-sections that is located closer to the intake device end of the inner cavity 221. The latter does not contain any solid parts, therefore, completely free and tapers shown in Fig. 1 along axis 202 direction away from the inlet. The width and surface of the cross-section of the internal cavity 221 decreases linearly in the direction away from the inlet 207, so decreases the inner ends most remote from the inlet passages 247 almost to zero, i.e. practically disappear.

Two educated catalytic bodies of a group of passages 217 perpendicular to the average plane 209 and is directed opposite from each other and from the internal cavity of the side outward from the latter. the NII from each other, which is much longer than the distance adjacent to each other belong to the same group, i.e. to the same catalytic body passages.

Between the inner surfaces of the first lateral or longitudinal walls 204a of the housing and turned to him first side surfaces 211c catalytic bodies are intermediate space forming together with existing between the inner surface of the end wall 206 of the housing and end surfaces 211f catalytic tel intermediate space external cavity 222, which is connected at the second end wall 206 of the housing with an inner space of the exhaust device 208. Wellhead bore of the inner space or, respectively, the passage of the exhaust device 208, bringing in an external cavity 222 may be circular or similarly osteoma hole inlet 207 quadrangular.

The catalyst 201 can be built for their use, for example, in a pipe of the exhaust system of the gasoline internal combustion engine vehicle and is under his bottom, that the second wider lateral and/or longitudinal walls 204b housing will be approximately parallel to the bottom of the vehicle and the surface on catocalinae height.

When the catalyst 201 exhaust gas flows through the inlet device 207 in the inner cavity 221, changing her direction and flows from serving as an input surface for the exhaust gas of the internal surfaces 211 catalytic bodies in the inner ends of the passages. The exhaust gas is catalytically processed during the flow through the passages, re-emerging from the catalytic bodies in the outer surfaces serving as the output surfaces for the exhaust gas, and then flows through the external cavity 222 in the final device.

The inclination of the inner surfaces 211d to the axis 202 and the decrease in cross-sectional area of the internal cavity as the distance from the inlet, contribute to the fact that the flow of exhaust gas when the flow into the catalytic body is evenly distributed on all of the relatively large internal surfaces serving as an input surface for the exhaust gas, and accordingly, all passages 217. This allows to achieve high efficiency in catalytic processing and support due to catalyst loss of pressure or, respectively, the back pressure on the low urovnya 211d catalytic bodies, serving as an input surface for the exhaust gas, the exhaust gas can come into contact with only relatively small areas of the wall 203. The exhaust gas can accordingly give between the inlet device and the input surfaces for the exhaust gas catalytic bodies just a little bit of heat through the casing wall into the environment. Both catalytic body also give only relatively slowly heat and the environment through the walls of the housing. At cold start, so at least those areas of catalytic bodies 211, which border with the inner cavity 221, quickly heats the exhaust gas to a temperature that effectively catalytically treating the exhaust gas.

The catalyst 231 shown in Fig. 5 and 6, defines the axis 232 and has a body 233 with a drum 234. The latter has two first lateral and/or longitudinal walls 234a and two second lateral and/or longitudinal walls 234b. Shell 234 in cross section, again generally rectangular shape, so that the lateral and/or longitudinal walls mostly flat and in pairs parallel to each other. Further, the first lateral and/or longitudinal walls 234a narrower than the second side and/or the 236 with the second hole 236a. Both holes form together with welded into them pipe inlet device 237 or, respectively, the discharge device 238. In Fig. 6 shows the average plane 239 passing between the two walls 234a along the axis 232.

The body contains the catalytic means 240 with two catalytic bodies 241 arranged on mutually opposite sides of the Central plane of 239 and symmetric about this plane. Each catalytic body 241 has a lower base 241a, the upper base 241b, the outer surface 241c, the inner surface 241d, the first end surface 241e and the second end surface 241f. Both catalytic body 241 form shown in Fig. 5 the context of a parallelogram with right angles to the other parties, namely the rectangle. Accordingly, the bottom base 241a, and the upper base 241b each catalytic body 241 forms a rectangle. Surface 241c, 241d, 241e, 241f perpendicular to the bottom base 241a and the upper base 241b. Each catalytic body 241 forms, therefore, mainly the prism in the form of a parallelepiped.

Both catalytic body 241, not counting other forms of the lower and upper bases, executed, Nai latter, mostly flat sheet elements.

Various sheet items catalytic bodies 241 form then in terms of a rectangular parallelogram, namely a rectangle, and may, for example, as the catalytic body 211 to consist of each of the individual blanks of sheet metal to be welded with each other and with the spacer elements. Related to the same catalytic body sheet elements may be, however, formed by pieces of whole folded metal strip and held together alternately at the first or second end surface through the crease. Further, each of the catalytic body 241 has a group of straight parallel passages 247, running perpendicular to the inner surface 241d from the latter to the outer surface 241c.

Each lower base and upper base 241a, 241b both catalytic bodies 241 addressed to one of the second, broader lateral or longitudinal walls 243b and adjacent to one of these walls. Both catalytic body 241 adjacent the first end surfaces 241e on mutually opposite sides of the first hole 235a to the first end wall 235 and, for example, connected by means of welded joints. Power the military that is perpendicular to the Central plane of 239. The outer surface 241c both catalytic bodies are each at a distance from one of the first narrower lateral (or longitudinal walls 234a), and they are parallel to these walls 234a. The inner surface 241d both catalytic bodies are parallel to each other throughout their length are separated from each other. Both turned in the opposite direction from the first end wall 235 of the second end surface 241f catalytic bodies are connected tightly and firmly with educated of washers rectangular shape, mounted at a distance from the second end wall 236 and a limit element and/or the latch 249, for example welded. Both catalytic body 241 and both formed by groups of passages 247 are everywhere at a distance from each other, which is significantly more than the distance from each other parallel passages, available in the same catalytic body.

Inserted between the two catalytic bodies 241, preferably hollow stopper 250 has a cross-sectional end 250a in the shape of a rectangle or square, which is firmly and tightly connected, for example welded, end items and/or the latch 249 and/or directly with reversed in the opposite direction from fuckno is 247, nearly or exactly equal to the distance between the facing to each other of the inner surfaces 241d both catalytic phone Limiter 250 juts out between two catalytic bodies 241 almost to the mouth of the inlet, 237. The limiter has at the mouth of the inlet, lesbianorgy or slightly rounded end, edge, or ridge line which lies in the said mid-plane, which passes between the two walls 234a and between the two catalytic bodies 241 along the axis 232. The limiter 250 has two facing each other side of bounding surface 250b, each of which is facing to the inner surface of one of the catalytic bodies 241. Both the bounding surface 250b inclined to each other in the direction from the inlet axis 232, so that each of the bounding surface in the direction from the inlet closer to confronting her inner surface 241 of the catalytic body 241. The bounding surface 250b are flat and form with the axis 232, the average plane passing between them and the inner surfaces of the 241d angle, which is the maximum 45opreferably maximally 30oand, for example, Maxim is s 234b of the hull surface 250c, each of which is addressed to one of the second lateral or longitudinal walls 234b and adjacent to it.

The inner space of the inlet 237 communicates with existing between the two catalytic bodies 241 internal cavity 251. The limiter 250 divides the inner cavity 251 of at least the greater part of its axial length into two spare area, width and cross-sectional area along the axis 232 in the direction away from the inlet, 237 linearly reduced and the most remote from the inlet, passes almost become equal to zero. Between the first lateral or longitudinal walls 234a and end wall 236 of the housing 234 and the first side surface 241c catalytic bodies, and a stop wall 249 (blank) has an external cavity 252 associated with the internal space of the exhaust device 238.

When the catalyst 241 exhaust gas flows through the inlet device 237 subdivided limiter 250 on two free internal cavity 251. The exhaust gas changes direction in the free zones of the internal cavity 251 and flows at the border with the free areas of the cavity parallel to the axis 232, the gas in the inner cavity 251 is supported by a bounding surface 250b, located on a slope in the direction away from the inlet device 237 to the inner surfaces 241 serving as an input surface for the exhaust gas. The exhaust gas then flows through the passages 247 outwards into the external cavity 252 and through it to the exhaust device.

The catalyst 231 is made similar to a catalyst 201 and has a similar quality.

The catalyst 261 shown in Fig. 7-9, has the axis 262 and housing 263 with covering the axis 262 cowling 264. The latter has the first two, in cross-section, for example, arcuate lateral and/or longitudinal wall 264a and two second, for example flat, and parallel longitudinal walls 264b. Shell connected at its ends with the first end wall 265 or, respectively, the second end wall 266. Both end walls are coaxially of the axis 262 hole 265a or, respectively, 266a, which is welded employee inlet 267 or, respectively, the outlet 268 device socket. The housing defines an average plane 269 passing between the walls 264a and axis 262 has a first size in cross-section, measured perpendicularly thereto, and a second size in cross-section, measured parallel to the Central plane 269, precatalytic means 270, situated in the body, have two catalytic body 271. The last mirror-symmetric relative to the Central plane 269. Both catalytic body 271 are mostly flat adjacent one to another lower base 271a and flat adjacent one another upper base 271b shared or interconnected bottom base 271a and the total interconnected upper base 271b. Each catalytic body 271 has, further, the outer surface 271c, the inner surface 271d, the first end surface 271e and the second end surface 271f. Surface 271a, 271b parallel to one another and the walls 264b and adhere to them. Both the inner surface 271d represent a cross-section curved ruled surfaces and abut each other parallel to the axis 262 of the longitudinal edges. The edges of both inner surfaces 271, located closer to the intake device 267 (shown in Fig. 8), together form a single closed line, namely a circle. Both the inner surface 271d at their end located at the inlet, 267, are their average cross-sectional areas, i.e. excluding them adjacent to each other of the longitudinal edges to each other at some distance. Galenia from inlet 267 so, they have more remote from the inlet, 267 ends have straight, basically matching and lying in the Central plane of 269 region shown In Fig. 9 section located between both ends of the catalytic bodies, both the inner surface 271d have together form the lens. Both outer surfaces 271c in the cross section also represent curved surfaces. Each outer surface 271c all parallel to the axis 262 and perpendicular to the Central plane of 269 cross-section at least approximately parallel to the inner surface 271d of the corresponding catalytic body 271.

Each catalytic body 271 is formed from a package at least initially rectangular alternately successive first and second sheet elements. The first sheet items have corrugations, of which some are marked in Fig. 7. The corrugations are perpendicular to the longitudinal edges of the first plate element. The second sheet elements are mostly flat. The first and second sheet elements in the manufacture of catalytic bodies 271, twisted relative to each other, are folded one upon the other and rigidly connected with each other by retaining means is further edge of the sheet elements together form the outer 271c or accordingly, the inner surface 271d catalytic phone If sheet items catalytic bodies remain exactly in the shape of a rectangle, the end surface of the 271e, 271d form a curved surface. However, you can perform the first end surface 271e, for example, at least at their adjacent inner surfaces 271d areas, flat and parallel to the first end wall 265 to which they are adjacent in the finished catalyst 261. Both catalytic body 271 is rigidly and firmly connected to each other, for example welded. Further, both the catalytic body is connected to the housing 263, for example welded. In particular, the first end surface 271e catalytic bodies tightly connected with the first end wall 265 of the housing.

Each catalytic body 271 has a team of direct passages 277, going from the inner surface 271 to the outer surface 271c. All 277 passes parallel to the second lateral and/or longitudinal walls 264 and, therefore, also one and the same plane. Next, all the passages formed by the same pair of sheet elements, parallel to each other. On the contrary, the passages form with an average plane 269 angles, the magnitude of which is dependent on the distance DN passes, closest to the bottom base 271a or upper base 271b, called the angle is approximately 90o. The section plane of Fig. 7, in the middle between the lower base and upper base, passages 277 form then with the average plane 269 angle other than 90opreferably equal to at least 45oand, for example, equal to at least 60o. Passages 277 have the cross-sectional area that is constant along their entire length. Further, all 277 passes have at least approximately the same length.

The inlet device 267 is connected with the inner free cavity 281, covered both the internal surfaces 271d. Wellhead bore inlet leading into the internal cavity has a circular shape and has approximately the same diameter as the end of the internal cavity 281, located at the first end wall 265. The surface of the cross-section of the internal cavity 281, in accordance with the implementation of the internal surfaces 271d catalytic bodies, decreases in the direction away from the inlet linearly with distance from the inlet. Between outer surfaces 271c and second end surfaces of the 261 1 formed by the inner surfaces 271d inner wellhead surface of both groups of passages are adjacent to each other. The remaining parts of the passages, and particularly at their outer ends, bringing the outer surface 271c, both groups of passages, however, are again at a distance from one another.

When the catalyst 261 exhaust gas through the suction device 267 is inserted into the internal cavity 281 enters the inner surfaces 271d, servants of the input surfaces for the exhaust gas passages 277 both catalytic bodies 271, arises from the outer surfaces of 271c, servants output surfaces for the exhaust gas, again from the catalytic solids and then through the external cavity 282 flows to the exhaust device 268. As the internal cavity 281 catalyst 261 basically wholly and exclusively limited to the inner surfaces of the 271d catalytic bodies 271, the exhaust gas between the flow from the inlet device and flow into the catalytic body to give even less heat into the surroundings of the catalyst 261 than the above-described catalysts 201 and 231. Accordingly, the catalytic body 271 during the cold start will be heated more rapidly to the operating temperature required for the catalytic treatment of exhaust gas than the catalysts 201 and 231.

N the WA 295. The catalyst was performed in substantially similarly depicted in Fig. 7-9 catalyst 261, but differs from the latter by the fact that between the ring 294 and catalytic means 295 has an external cavity 297, completely covering the catalytic means 295.

It is shown in Fig. 11 and 12, the catalyst 301 has an axle 302 and the housing 303. The latter is identical to the housing 263 and has a shell 304, the end wall 305, and 306, the exhaust device 307 and the exhaust device 308. Case 303 contains the catalytic means 310 with two catalytic bodies 311 located on different sides of the middle plane of the housing. Catalytic body 311 has a lower base 311a, the upper base 311b, the outer surface 311c, the inner surface 311d and two end surfaces 311e, 311f. The inner surface 311d parallel to the axis 302 and form together a cylindrical surface having a cross-sectional circular shape. The outer surface 311c also parallel to the axis 302 and in cross section is curved so that the measured perpendicularly to the said mid-plane distance of the outer surface 311c from the inner surface 311d of the corresponding catalytic body everywhere equal. End surface is devoutly elements with partially shown in Fig. 11 and 12 of the corrugations, and the second mostly flat sheet items. Each catalyst body has a team of direct and mostly equal length passages 317, running perpendicular to the said Central plane from the inner surface 311 to the outer surface 311c.

Both catalytic body 311 is rigidly and tightly connected with each other and with the front wall 305. On the opposite end of the catalytic bodies 311 secured composed of washer-like seal cap 319. On the last anchor limiter 320, which juts out into the covered inner surfaces 311d internal cavity 321 to approximately the mouth of the inlet. The stopper 320, for example, hollow and rotationally symmetric about the axis 302 has a paraboloid shape and outside the bounding surface 320a. This surface restricts together with the inner surfaces 311d both catalytic tel 311 annular cross-sectional free area of the internal cavity 321. The cross-sectional area of this open area of the internal cavity 321 linearly decreases in the direction away from the inlet 307, so that it is at the inner ends most remote from the inlet passages 317, post the 308.

The catalyst 301 is identical to the catalyst 261.

Shown partly in Fig. 13 the catalyst 361 has an axis 362 and body 363, which shows only an outline of the shell 364, covering the axis 362. Shell has three distributed around the axis of the flat lateral and/or longitudinal walls 364a and defines in cross-section of an equilateral triangle, whereby, however, the angles of the triangle replaced by lateral and/or longitudinal walls 364b, curved in cross section.

Case 363 contains catalytic means 370 with three distributed around the axis of the protruding against the curved walls 364 catalytic bodies 371. Each of them has two flat parallel to each other and to the axis 362 lateral surface 371a, respectively, 371b, the outer surface 371c, the inner surface 371d and two end surfaces 371e or, respectively, 371f. The outer surface 371c and the inner surface 371d in cross section is curved and parallel to the axis 362. Three of the inner surface 371 form together a circular cross-section cylindrical surface. The outer surface 371c are everywhere at least approximately the same distance from the inner surfaces 371d, measured parallel to Becky and perpendicular to the axis 362. Each catalytic body 371 is a package successive, alternating, first and second sheet elements in the form of a rectangle. The first sheet elements are partly shown in Fig. 13 corrugations, while the second sheet elements are mostly flat and parallel to the axis 362. Each catalyst body has a team of direct 377 passes, which extend from the inner surface 371d to the outer surface 371c parallel to each other and parallel to the plane passing through the axis 362 and through the corresponding catalytic body, 377 passes perpendicular to the plane passing through the axis 362 and the opposite inner surface 371 of the corresponding catalytic body, have throughout their length constant cross-sectional area and all have at least approximately the same length.

Three catalytic body 371 cover the limiter 380 having a paraboloid shape. The limiter limits together with the inner surface 371d catalytic tel 371 annular cross-sectional open area is fully covered in the cross section of the inner surfaces of the 371d internal cavity 381, which goes not shown suction device, and the coy 364 and surface 371a, 371b, 371c catalytic tel 371 external cavity 382 is connected with a not shown exhaust device enclosure. Three groups of passageways 377 are thus in three different directions from the inner cavity 381 external cavity 382 and, with the exception of the inner ends of the passages, everywhere are at a distance from each other.

It is shown in Fig. 14 catalyst 401 determines the axis 402 and has a body 403, which shows only the shell 404. The latter has, for example, four flat distributed around the axis of the wall.

Case 403 contains the catalytic means 410 with four catalytic bodies 411. The latter is distributed evenly around the axis 362 and together form a cross. Catalytic body 411 is identical catalytic bodies 371 and have, in particular, each outer surface 411c and the inner surface 411d. Each catalytic body 411 has a package of sheet elements and a group of straight, parallel to one another passages 417, going from the inner surface 411d to the outer surface 411c. The inner surface 411d together form a closed cylindrical surface and cover the limiter 420 in the form of a paraboloid, and an internal cavity 421 ring free region, the second device. Between the shell 404 and outer surfaces 411c has an external cavity 422, soamsawali shown with a venting device.

Depicted schematically in Fig. 15 catalyst 431 has an axis 432 and the housing 433 with metal walls. The latter are parallel to the axis 432 shell 434 and located at both ends of the shell firmly and tightly connected to it through the seaming of the end wall 435, 436. Shell is also shown in Fig. 17 and has according to this figure the cross-sectional shape of a square, the corners of which are replaced by rounded transitions. Both the end wall 435, 436 essentially flat and perpendicular to the axis 432 and have a hole in the middle. The inlet device 437 and exhaust device 438 catalyst 431 are each nozzle, which consists of a segment of a cylindrical tube, passes through the hole of the first end wall 435 or, respectively, the second end wall 436 is situated within the walls of the casing interior space and rigidly and tightly connected, namely welded, to the corresponding end wall. In the aforementioned internal space segment of the pipe or pipe section is provided with a hole 438a, distributed along the wall.

Each catalytic body 441 has a package following each other, in alternation, first and second sheet elements. The first sheet elements 443 have corrugations, partially shown in figures 15 and 16. Each first sheet element 443 defines two flat contact surfaces, stick to the crests of its corrugations. The second sheet elements are mostly flat. Sheet items have in a projection perpendicular to the flat surfaces of the first plate element 443 and to the surfaces, and the surfaces of the second plate element, the shape of rectangles, so that, therefore, in particular, both longitudinal edges of each sheet element are straight and parallel to each other. The corrugations of each of the first sheet element 443 straight, parallel to each other and perpendicular to the longitudinal edges of the respective sheet member. Sheet items related to the same catalytic body 441, connected by means of retaining means rigidly with each other so that the second flat listowel Prosobranchia or blankaartia spacers 445, which are like spacer elements 215 shown in Fig. 4 catalytic body at the shorter edges of the sheet elements and are at least approximately parallel to corrugation adjacent the first sheet element 443. Sheet items belonging to the same catalytic body, curled, however, with respect to each other so that their longitudinal edges together form the outer surface 441c and the inner surface 441d, each consisting of a curve of a ruled surface. Belonging to the same catalytic body 441 sheet elements are welded at their shorter edges with each other and with the spacer elements. The end surface 441e, 441f may consist of curved surfaces, the resulting twisting of the sheet elements having the form of rectangles. The end surface 441e, however, for the sake of simplicity is shown in Fig. 16 in the form of planes. However, you could perform end surface 441e and/or 441f through additional processing of flat and perpendicular to the axis 432. Four catalytic body 444 is rigidly and tightly connected to each other, namely welded, at their longitudinal edges of the inner surfaces of 441d and leg tranny shown several of uasin or the like, which will additionally be connected to each other catalytic body. Each catalytic body 441 is a group of straight passages 447, going from the inner surface 441 C to the outer surface 441d. All related to the same catalytic body 441 parallel to the same passing through the axis 432 and through the middle of the catalytic body plane and the lateral surfaces 441a, 441b. Passages 447, forth, perpendicular to the longitudinal edges bounding the first plate element. Related to the same catalytic body 441 and passages 447 are thus different directions, which, as shown in figures 7-9 catalyst 261, depend on the distance from the plane passing through the axis 432 and through the middle of the catalytic body 441. It should be noted that each of the catalytic body 441 is in comparison with its outer dimensions, in reality, far more leaf elements than shown in figures 16-20.

Catalytic means 440 is rigidly connected to the end surfaces 441e, 441f with an internal space of the shell 443 ends of the nozzles that form the inlet 437 or, respectively, the exhaust device 438. Catalytic means is moved to its tightly United with four catalytic tel 441 the end covered with the inner surfaces of the 441d internal cavity 451. Passages 447, related to the four catalytic tel 441, diverge, in accordance with the location of the catalytic bodies, four different, evenly distributed around the axis 432 of the internal cavity 451, away from her. The inner diameter of the inlet, 437 and, in particular, it is connected to the catalytic means 440 end equal to the diameter of the circle formed by the edges of the inner surface 441d, lying in the end surfaces 441e, so that the inner cavity smoothly adjoins the inner space of the inlet. The internal cavity 451 totally free, does not contain limiter corresponding to the stops 250, 380, 420, and has a cross-sectional area decreased linearly along the axis 432 and the direction away from the inlet. Between the sides 434 and surfaces 441a, 441b, 441c catalytic tel 441 has an external cavity 452 connected holes 438a pipe exhaust device 438 with the internal space of the last,

The catalyst 431 can be integrated into the exhaust system of the internal combustion engine. When the engine is shown by the arrow in Fig. 15 exhaust gas flows through the inlet device 437 into the internal cavity 451. Otrb the t through the passages 447, and he catalytically processed. The exhaust gas then gets into an external cavity 452 and it flows to the exhaust device 438, and also part of the exhaust gas can flow between the side surfaces 441a, 441b adjacent to each other catalytic tel 441. After that, the exhaust gas flows through the holes 438a in the inner space of the inlet 438 and leaves through it, the inner space of the housing 433.

The catalyst shown in the figures 15-19, has various advantages, which are partly already described in relation shown in figures 1-14 catalysts, and combines these advantages are particularly advantageous way. The catalyst 431, for example, has a relatively small cross-section perpendicular to the axis 432 in comparison with the amount of exhaust gas that is to be processed per unit time. Further, the passages 447, available in catalytic tel 441 may have a small cross-sectional area and be located close to each other. Each catalytic body 441 can be so a large number of passages per unit area perpendicular to its passages 447 outer surface 441c or inner surface 441 or ParallelArray at least several passages of the surface section. This allows, on the other hand, to achieve high efficiency, to perform the relatively short passages and reduce the volume, weight, and the need for noble metal catalytic means. Due to the fact that the passages 447 relatively short in comparison with the quantity to be processed exhaust gas and in comparison with the axial length of the catalytic means, and also with the length of the inner surface 441d, due to the catalytic means 440 fall of pressure at work, despite the small cross-sectional area of the passages can be maintained at a low level. Due to the linear decrease in the cross-sectional area of the internal cavity 451 in the direction away from the inlet, 437 ensures uniform distribution of exhaust gas according to various passages that contributes to the fact that the exhaust gas substantially without turbulence and low pressure loss changes its direction and distributed in different aisles. As the inlet device 437 and an internal cavity 451 have a common straight axis 432 and the exhaust gas mainly flows directly - i.e. without changing the direction of the inlet into the internal cavity 451, 440, educated four internal surfaces 441d, there is only a small pressure loss. Further, between the outer surfaces of the 441c serving as an output surface for the exhaust gas catalytic means, and an exhaust device 438 occurs only a small pressure loss. Therefore, the catalyst causes only a small pressure loss. As the exhaust gas enters through the inlet device without contact with the walls of the casing directly into the internal cavity 451 catalytic means 440 and as the latter never attached directly to the walls of the housing, the catalytic means 440 during the cold start quickly heated to the temperature required for the catalytic treatment of exhaust gas. The advantage is that in the inner cavity 451 there is no limiter corresponding to the stops 250, 380, 420, which during the cold start would have to heat up. Catalytic means 440 stable and durable and can be manufactured economically and with low-cost integrated in the housing. The fact that the catalytic means can be built into a metal case, without polskimi means, also facilitates economical manufacture of catalytic funds.

Catalytic body 471, partially shown in figures 20 and 21 may for example be in the form of a contour similar to that of the catalytic body shown in Fig. 1-4, and, therefore, form the prism, the bottom of which consists of an oblique parallelogram. Catalytic body 471 has a package alternately follow one another, the first plate element 473 and second sheet elements 474, which have the same shape of that of the lower base of the prism. Each first sheet element 473 has a main section 473a with elevations consisting of evenly distributed along the main section 473a of the bumps 473b, of which at least the majority are at a distance from the edges of the sheet element 473 and limited closed in itself, for example a circular line shape. In the form shown in Fig. 21 the context of convexity 473b, leaning up and down, follow each other alternately. Each first sheet element has thus convexity 473b acting in the opposite one from each side of the mean plane of the first sheet element and located between adjacent protuberances oblastnyh section 473, located at its shorter edges. The second sheet elements 474 mostly flat. Sheet items 473, 474 held together by retaining means which have spacers 475, located between the clamping sections 473e and opposite them clamping sections of the second sheet elements 474 and welded sheet items. Catalytic body 471 has a group of passages 477, going from one to the other longitudinal edges of the sheet elements.

You can have two performed according to Fig. 20, 21 catalytic body 471 similarly catalytic body 211 so, in the case of the catalyst, that they together form a V-shaped catalytic means. However, for all other shown in Fig. 4-18 catalytic bodies, there is a possibility of supply not corrugations and bumps corresponding to the protuberances 473b.

The catalysts can be changed in another respect.

For example, parallel to the axis of the first lateral and/or longitudinal walls 204a, 264a housing 203 or, respectively, 263 could be replaced by lateral and/or longitudinal walls, which approach each other as the distance from the inlet.

Hereinafter, can be varied to the lateral and/or longitudinal walls 204a shown in Fig. 1-3 catalyst 201 may be replaced by lateral and/or longitudinal walls, curved in cross-section, as is, for example, catalysts, shown in figures 7-12.

Further, the passages shown in Fig. 1-6, 11, 12, 13 and 14 may be replaced by passages formed perpendicular to the axis planes angle, comprising preferably not more than 45oand for example not more than 30o.

The outer and inner surfaces of the catalytic bodies shown in figures 13 and 14 of the catalysts could be in the cross section is flat and not curved. The internal cavity 381 or, respectively, 421 are then in cross section take the form mainly of the polygon, i.e., triangle or quadrilateral and not a circular shape. Communicating with the internal cavity of the mouth openings of the inlet devices shall be then, according to this cross-section is triangular or quadrangular form, and not in a circular shape and have the same dimensions in cross-section, the inner cavity. The limiter 380 or 420 of these catalysts, having the form of a paraboloid, could then be replaced by a triangular or tetrahedral restrictive sterile with distance from the inlet.

The catalyst according to Fig. 13 could do without the limiter 380 and provide three catalytic body instead, the outer and inner surfaces, which are in the direction away from the inlet, just as the catalysts according to figures 7-9 and 15-19, close to the axis and to each other.

The catalyst shown in Fig. 15, it would be possible to replace the pipe, forming the inlet device 437 and consisting of a cylindrical piece of pipe, coupling, which at least partially extends over the cone in the direction of the catalytic means. Further, there is an option to change shown in Fig. 15 exhaust device that it is addressed to the catalytic means to an end, likewise shown in figures 1, 2, 5, 7, 11 prom devices, only comes to the second end wall 436 and thus not juts out into the inner space of the housing 433. Catalytic means 440 is fixed then only the inlet 437 and were not assigned if the exhaust device. If necessary, it would be instead directed to the exhaust device, the end of the catalytic means 440 to connect the connecting elements consisting of neskol.

At shown in Fig. 1-14 catalysts and/or catalytic funds could - in the same way as shown for catalyst 431 in Fig. 15, to provide the inlet device, and possibly the exhaust device protruding into the inner space of the shell cut the pipe or pipe and catalytic means to fasten on these segments of the pipe or pipes so that they are at a distance from both end walls and, for example, from the shell.

Further, it would be possible to provide more than four catalytic body, each with one group of passages and, similarly, the catalysts according to Fig. 1-19, distribute them around the axis so that they together cover the internal cavity.

Welded joints connecting sheet and the spacer elements of the catalytic bodies to each other, may be replaced by compounds by brazing or in some embodiments, clamping connections. The retaining means may then have to create a clamping connection bolts that pass through the sheet and spacer elements. It is also possible to provide even holding means, such as bolts and spacers that perekrashivanie elements of the retaining means, then you can be a little shorter than the other passages.

The catalytic funds described in figures 1-19 defined sheet elements and adjacent to their surfaces to the plane of the seal, as well as flat sheet elements parallel to the axis of catalysts and catalytic means. However, I could have placed a sheet items at least a catalytic bodies having flat inner and outer surfaces, so that the designated sheet elements and adjacent the plane fit themselves flat sheet elements formed with the axis of catalysts and catalytic means the angle, and, for example, shown in Fig. 1-3 located V-shaped catalytic funds would be perpendicular to the walls 204b of the body and either perpendicular to the axis 202, or perpendicular to the inner surfaces 211d, as well as to the outer surfaces 211c. Flute is then shown in catalytic bodies can run parallel to the walls 204b from the inner cavity 221 to the external cavity 222.

1. The catalyst for catalytic treatment of exhaust gas from the housing and positioned therein catalytic means, and has an internal cavity, náchod the catalytic means and at least a part of the body, moreover, catalytic agents have a sheet items, restricting passages leading from the inner cavity to the outer cavity, and at least one leaf element of each pair adjacent to each other plate element has exaltation, characterized in that the catalytic means have at least two packages of sheet elements belonging to the same package sheet items, define adjacent parallel plane is tight and limited different packages passages diverge in different directions from the internal cavity.

2. The catalyst p. 1, characterized in that different packages of sheet elements at least at the ends of the passages opening into the external cavity are at a distance from each other, which is substantially greater than the distance between adjacent with each other, referring to one and the same package, the sheet elements.

3. Catalyst under item 1 or 2, characterized in that belonging to the same package adjacent to each other sheet elements relate to each other in planes fit.

4. The catalyst according to any one of paragraphs.1, 2 or 3, characterized in that each packet has the following in seredova the

5. The catalyst according to any one of paragraphs.1 to 4, characterized in that the elevation of corrugations formed and related to the same sheet element corrugations parallel to each other.

6. The catalyst according to any one of paragraphs.1 to 5, characterized in that each leaf element has a projection that is perpendicular to the adjacent to the corresponding sheet element plane fit, two straight parallel one to another region.

7. The catalyst p. 6, characterized in that each leaf element in the projection has the shape of a rectangle and two other straight lines parallel to one another territory.

8. The catalyst according to any one of paragraphs.1 to 7, characterized in that different packages are contiguous with the inner cavity of the inner surface, together covering the inner cavity cross-section in the main completely and without gaps.

9. The catalyst according to any one of paragraphs.1 to 8, characterized in that each package of sheet elements has one flat, adjacent to the inner cavity, the inner surface and one flat, parallel thereto and adjacent to the external cavity, the outer surface, and passages have a mouth lying in the inner surface and outer surface.

11. The catalyst according to any one of paragraphs.1 to 10, characterized in that the inlet of the device facing the inner cavity of the inner space and an exhaust device connected to the external cavity internal space, the internal cavity has at least one adjacent to the catalytic means free area, the cross-sectional area which decreases in the direction away from the inlet, the inner space of the inlet at its opening into the internal cavity of the mouth is generally the same cross-sectional shape and generally the same dimensions of the cross section, the inner cavity.

12. The catalyst according to p. 11, characterized in that the cross-sectional area is free or, respectively, each open area of the internal cavity mainly along the whole of its size in the direction away from the inlet in a generally linear decrease with distance from the inlet.

13. The catalyst according to p. 11 or 12, characterized in that the inner space of the inlet, and the inner cavity has published in the past the mouth of the inner space of the inlet cross-section of obrazuje, fixed nozzle, which has an outer cylindrical section and extending towards the inner space segment, hole together with the nozzle forms the inlet device.

15. The catalyst according to any one of paragraphs.11 to 14, characterized in that the inner space of the inlet, at the mouth facing the inner cavity is rectangular in shape.

16. The catalyst according to p. 11 or 12, characterized in that the inner space of the inlet, and the inner cavity has published in the past the mouth of the inlet cross-section have the shape of a circle.

17. The catalyst according to any one of paragraphs.11 to 16, characterized in that different packages are adjacent to the internal cavity of the inner surface, approaching one another in the direction away from the inlet.

18. The catalyst according to any one of paragraphs.11 to 16, characterized in that the catalytic media single axis, packages have parallel adjacent to the inner cavity of the inner surface, the inner cavity is delimited and with opposite him the inner surfaces of the limits at least one spare area within the displacement.

19. The catalyst according to any one of paragraphs.11 to 18, characterized in that the housing has a shell, the first end wall, second end wall, the inlet device in the first end wall, the outlet device at the second end wall.

20. The catalyst according to p. 19, characterized in that between the inner surfaces of the first lateral or longitudinal walls of the casing and turned to him first side surfaces of the catalytic bodies are intermediate space forming together with existing between the inner surface of the second end wall of the casing and the end surfaces of the catalytic tel intermediate space external cavity.

21. The catalyst p. 19 or 20, characterized in that between the cowling and catalytic means has an external cavity, completely covering the catalytic means.

22. The catalyst according to any one of paragraphs.19 to 21, characterized in that the catalytic body firmly attached by its first end surfaces of the sections of the first end wall.

23. The catalyst according to any one of paragraphs.11 to 22, characterized in that the suction device is rigidly and tightly connected with the walls of the casing pipe, which acts reach the sides at a distance from the casing wall, the input device communicates with the internal cavity.

24. The catalyst according to any one of paragraphs.1 to 23, characterized in that the sheet elements have a coating of catalytically active material, each leaf element has at least one flat clamping area adjacent to the flat clamping section of another sheet element and/or element holding means adjacent one to the other pressure parts and elements are rigidly connected one with the other.

 

Same patents:

The invention relates to catalytic means for catalytic treatment of exhaust gas

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The invention relates to the field of engineering, namely the catalytic converters of exhaust gases

The invention relates to engine and can be used for purification of exhaust gases of internal combustion engines

The invention relates to a device for the catalytic purification of exhaust gas of internal combustion engine

Catalytic reactor // 2134355
The invention relates to a device purifying exhaust gases, in particular exhaust gases of internal combustion engine

FIELD: mechanical engineering; internal combustion engines.

SUBSTANCE: proposed exhaust gas catalytic converter of internal combustion engine contains housing with inlet and outlet branch pipes, several reactors with catalysts arranged in parallel with gas flow and exhaust gas distributor made in form of disk enclosed in case in front part of which in direction of gas flow and on outer surface of distributor diametric grooves are made with balls fitted in space of groove, so distributor is installed for movement relative to case with possibility of rotation under action of exhaust gas pressure. Slot is made in lower part of housing under distributor in which ball lock is fitted, and on outer surface of distributor, parallel of diametric groove, cavities are made for lock ball. Idle run sector is made on front end face wall of distributor whose angle is equal to angle of sector of catalytic reactor, and regenerative sector is placed in its space formed by two inner partitions and rear end face wall equal to two idle run sectors, gas flow rate adjusting gate installed for rotation relative to distributor under action of exhaust gas pressure, spring installed on axle and rigidly connected with gate in zone of no direct action of exhaust gases. Diametric vanes are installed on front end face wall of distributor at angle in direction opposite to direction of rotation of gas flow rate adjusting gate under action of exhaust gas pressure.

EFFECT: improved efficiency of exhaust gas cleaning.

4 dwg

FIELD: mechanical engineering; internal combustion engines.

SUBSTANCE: proposed catalyst converter contains housing with inlet and outlet branch pipes, screens with catalyst, cup whose spaces are filled with metal chips of stainless steel wire, molybdenum or tungsten, and ring to control portions of gas flows passing through different spaces by overlapping gas outlet holes in greater or smaller degree. Catalyst is made in form of porous tablets, porous ceramic or perforated metal tape with catalytically active materials applied to its surface.

EFFECT: increased efficiency.

2 cl, 1 dwg

FIELD: transport engineering.

SUBSTANCE: invention can be used in exhaust systems of internal combustion engines. Claim contains description of housing for cellular element with tubular casing having inner wall. To prevent nondetachable connection of tubular casing with cellular element it has passive film at least on some section of its inner wall. Description of method of manufacture of carrier of catalyst converter with cellular element and housing proposed by invention is also given in claim. Carrier of catalyst converter manufactured using proposed method prevents thermal stresses between cellular element and tubular casing and provides possibility of soldering, including vacuum soldering.

EFFECT: provision of compensation for difference in values of thermal expansion of cellular element and tubular casing.

28 cl, 4 dwg

FIELD: transport engineering; vehicle internal combustion engines.

SUBSTANCE: invention relates to engine exhaust systems. Proposed carrier of catalyst converter has honeycomb member made of metal sheets. Said honeycomb member is axially extended, and metal sheets, at least partially are either structurized or profiled to form passage channels for exhaust gases. Carrier is provided also with tubular casing with edge and axial extent. Axial extent of tubular casing is less than axial extent of honeycomb member, and tubular casing, at least on one separate axial section is nondetachably connected with honeycomb member. Carrier is provided with bushing whose axial length is less than axial extent of honeycomb member, said bushing is located on outer part of honeycomb member near its end face and it has inner side surface which is nondetachably connected from side of said end face with radially external end sections of metal sheets of honeycomb member. Said honeycomb member projects in axial direction beyond the edge of tubular casing, and said projecting part of honeycomb member is enclosed in bushing. Description of design of converter with such carrier is provided.

EFFECT: prevention of stresses between honeycomb member and tubular casing even at high thermal load on carrier.

15 cl, 7 dwg

FIELD: mechanical engineering; internal combustion engines.

SUBSTANCE: invention can be for cleaning exhaust of compression ignition internal combustion engines. Proposed cassette catalyst converter has housing with external and internal walls with thermal insulation between said walls, solid particles filtering unit, porous penetrable cerement catalyst oxidizing, reducing and oxidizing-reducing units, cross partitions with through and blind ports, inlet and outlet branch pipes. Porous filtering unit for solid particles and porous penetrable cermet catalyst oxidizing, oxidizing-reducing and reducing and installed in series in pairs into through and blind ports of cross partitions to form cassettes. Each following partition is turned relative to longitudinal axis of converter, relative to preceding partition, through angle equal to 180°. Each unit is arranged in through and blind ports of partitions of its cassette.

EFFECT: improved efficiency of cleaning of exhaust gases, increased economy of engine, reduced consumption of fuel, increased service life and improved manufacturability.

1 dwg

FIELD: automotive industry.

SUBSTANCE: cellular member comprises at least partially shaped foil sheets defying flowing passages for predominantly exhaust gases generated in operating the internal combustion engine and at least one socket for the pickup. The method comprises making recesses in at least one of the foil sheets and stacking or/and rolling the foil sheets to define a cellular structure. At least one foil sheet is mounted so that to define at least one socket in the cellular member. The sheets are housed in the tubular casing provided with an opening. The foil sheets are interconnected and/or connected with the tubular casing to define an integral structure.

EFFECT: enhanced adaptability to production.

8 dwg

FIELD: removal of soot particles from exhaust gases during operation of internal combustion engines.

SUBSTANCE: proposed method consists in passing the exhaust gas flow through flow-type trap. Some particles are entrapped in trap in swirled state during such period of time when probability of their interaction with nitrogen dioxide contained in exhaust gases exists till complete elimination of entrapped particles. Trap has flow passages for free flow of exhaust gases for forming swirling or dampening zones.

EFFECT: avoidance of choking of trap by solid particles, thus ensuring continuous regeneration; reduced losses of pressure in trap.

9 cl, 3 dwg

FIELD: mechanical engineering; compression ignition internal combustion engines.

SUBSTANCE: proposed sectional catalytic converter has housing with catalytic filtering elements, cross partitions with slots and inlet and outlet branch pipes. Catalytic and filtering elements installed in slots of cross partitions are made in form of assembly sections of radial plates made of porous permeable cermet materials with filtering oxidizing and or filtering reducing properties. Cross partitions are made in from of sector-shaped plates alternating with slots so that slot of other end face of this section is arranged opposite to sector-shaped plate of other end face of assembly section. Each radial plate is fitted in slots of sector-shaped plates.

EFFECT: improved efficiency of cleaning of exhaust gases by developing areas of filtering and catalytic elements, reduced fuel consumption by decreasing counterpressure at engine exhaust and provision and provision of high quality of exhaust gas cleaning.

1 dwg

FIELD: purifying gas emissions.

SUBSTANCE: device comprises heat exchanger, heater, and catalytic neutralizer, which are connected in series in the direction of the flow of air or gases to be purified. The outlet of the neutralizer is connected with the heat exchanger. The heat exchanger is used for initial heating of the air or gases that inflow to the heat exchanger. The heat collecting device is provided with gages for measuring the temperature of the heat collecting material and the temperature of the purified air or gas and with the heating system connected with the control system.

EFFECT: reduced power consumption.

1 dwg

FIELD: mechanical engineering; catalytic converters.

SUBSTANCE: invention contains description of method of manufacture of cellular member with preset number (n) of metal sheet layers which are made from metal strip wound off at least one coil and least part of which is at least partially profiled metal sheets whose profile structure provides possibility of flow of liquid medium through cellular member which accommodates common free space of preset volume for sensor. According to proposed method, section of metal strip wound off coil is chosen to get metal sheet of corresponding dimensions, identificator is assigned to metal sheet according to which data are read off from memory concerning position of at least one of holes made in said metal sheet and on its outline. Before proceeding with manufacture of cellular member, at least one hole in preset position and with preset outline is made in metal sheet, and several such preliminarily made sections are coiled, assembled into pack and/or rolled to form cellular structure in which separate holes form free space for sensor. Device for making cellular member and catalytic converter carrier are also described in invention.

EFFECT: provision of free space corresponding to dimensions of sensor within the limits of existing production process, prevention of formation of free space of too large volume in cellular member at reduced cost.

19 cl, 4 dwg

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