Method of engine exhaust system operation and engine exhaust system of vehicle

FIELD: engines and pumps.

SUBSTANCE: in one example, hydrocarbon emissions from the engine are accumulated and/or sent to bypass the SCR to improve the SCR efficiency.

EFFECT: improved SCR catalytic converter efficiency and reduced NOx emissions from the vehicle.

8 cl, 10 dwg

 



 

Same patents:

FIELD: heating.

SUBSTANCE: invention relates to SCR system for exhaust gases cleaning. The cooling method of the dosing unit (250) of the reducing agent after flow termination of the exhaust gases is performed by the reducing agent supplied in it. Method also contains work stage of the supply unit to feed the specified cooling reducing agent with power decreased in comparison with operation under standard mode. Invention also relates to software with program code (P) for computer (200; 210) to implement the method according to the invention. Besides, the invention relates to SCR system and mechanical transportation vehicle equipped with SCR system.

EFFECT: more effective cooling of the dosing unit of SCR system after flow termination of the exhaust gases in SCR system.

17 cl, 5 dwg

FIELD: transport.

SUBSTANCE: invention relates to operation of diesel particle filters. Method of control over particle filter (15) of diesel (11) with carbon-black pickup (18) arranged at diesel particle filter (15) outlet (19). Note here that said carbon-black pickup (18) operates in compliance with the sequence of carbon-black filling phases divided by regeneration phases. This process comprises the stage whereat filter (15) boundary efficiency (Ebdl) is set. During regeneration phase readings of the counter that displays the level of pickup (18) filling with carbon-black are reset. Counter readings (I) are iteratively increased during the next filter filling stage unless readings (I) reach the counter preset threshold readings (lth). Filter (15) efficiency DPF is considered inadmissible in case the next regeneration phase of pickup (18) starts when counter readings (I) are lower than said preset threshold magnitudes (Ith).

EFFECT: reliable evaluation of diesel particle filter under real road conditions.

14 cl, 3 dwg

FIELD: engines and pumps.

SUBSTANCE: invention can be used in diesel engines. The diesel engine contains a particulate filter (13) installed in a discharge line (9) of the engine and an electronic control unit (3) for control of fuel nozzles (2) associated with engine cylinders. The electronic control unit (3) is configured for triggering, when the quantity of the particles accumulated in the filter (13), exceeding the threshold value is detected or assessed, of the method of control of nozzles (2) which identifies automatic recovery of the filter (13) by means of increase of temperature of exhaust gases sent to the filter (13), sufficient for burning out of particles in the filter. The electronic control unit (3) is configured for actuating of alarm condition, prohibiting the mode of automatic recovery and at the same time permitting the recovery mode by request which can be actuated manually by a driver when the electronic control unit (3) reveals a value lower, than a pre-set threshold value of the parameter identifying the quality of lubricant oil of the engine. The engine is fitted with manual controls for actuating of the mode of recovery by request. The electronic control unit (3) is configured for actuating of alarm condition also when the electronic control unit (3) detects the excess of the pre-set threshold value of amount of adverse events in which the stage of automatic recovery is interrupted before its end. The electronic control unit (3) is configured so that in case of detection of amount of adverse events with higher value, than threshold one, the condition alarm with prohibition of the automatic recovery mode and permission of the mode of recovery by request was actuated only in case when the electronic control unit also detects resistance to a flow of exhaust gases through the particulate filter, higher, than the threshold value. The quality of lubricant oil the engine is estimated by means of pre-set algorithm on the basis of value of the parameter defining the oil quality. The diesel engine control method is described.

EFFECT: decrease of impact of injected fuel on lubricant oil.

11 cl, 4 dwg

FIELD: engines and pumps.

SUBSTANCE: proposed process uses the transducer signal of measurement of parameter relates to nitrogen oxides (NOx) in exhaust gases flowing from exhaust gas afterpurification device. The latter makes a part of exhaust gas afterpurification system to detect the amplitudes of transducer signal of measurements performed in a definite period of measurements and to add the reducing agent to exhaust gases in afterpurification device. Additionally, this process comprises the steps that follow. Added amount of reducing agent is varied in compliance with preset mode for measurement period. NOx content variation amplitude is detected downstream of exhaust gas afterpurification device. Detection and preservation of added amounts of reducing agent when NOx amplitude variations revealed in exhaust gases downstream of afterpurification device are carried out if these satisfy the criteria of optimum adjustment of added quantity. Besides, this invention relates to exhaust gas afterpurification system.

EFFECT: optimised operation of catalytic neutraliser.

25 cl, 5 dwg

FIELD: transport.

SUBSTANCE: invention relates to method relevant to SCR systems for exhaust gases purification. The method relevant to SCR systems for exhaust gases purification includes following two phases: phase of making decision concerning necessity (exhaust gases flow termination) to cool reducing agent batching module (250) which is a part of SCR system by means of reducing agent being supplied to the module, and phase of prediction of temperature profile of the mentioned batching module (250) as the basis for making decision concerning mentioned necessity and proper prediction of weather predetermined temperature of batching module (250) is achieved after exhaust gases flow termination or not. Also, the proposed invention relates to computer software product containing program code (P) for computer (200; 210) designed for implementation of the method according to the invention. Besides, invention relates to SCR system and vehicle equipped with such SCR system.

EFFECT: higher efficiency of SCR system and lower risk of batching module overheating in SCR system after exhaust gases flow termination.

19 cl, 6 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to recovery of filter for solid particles. Method (500) relates to recovery of filter for solid particles (202). This filter is adapted for processing of exhaust gases resulted from ignition in ICE (101). This process comprises one step of temperature increase of said filter for solid particles (202), determination of filter temperature Tfilter and its comparison with first temperature Tlimit1, mm. Said increase is terminated when said definite temperature Tfilter decreases below said first temperature Tlimit1. Then, after said termination, at least one measure is taken for increase in filter temperature when Tfilter is higher than second temperature limit Tlimit2 higher than said first temperature Tlimit1. Besides, invention discloses the filter recovery system and vehicle incorporating the latter.

EFFECT: fuel savings.

15 cl, 6 dwg

FIELD: transport.

SUBSTANCE: invention relates to proportioning in SCR-system. Method relates to SCR-system and consists in the feed of liquid reducing agent to feeder (230) and, therefrom, to at least one point (250) of consumption from container (205). Method comprises the step feed pressure (P) developed by feeder (230) is continuously defined (s340). Besides, it comprises feeder operation control step (s360) on the basis of feed pressure (P) variations (P') to decrease the influence of undesirable air feed in feeder (230). Besides, invention relates to SCR-system and vehicle equipped with such SCR-system. Also it relates to machine-readable carrier wherein stored is the computer program related to SCR-system.

EFFECT: decreased undesirable emissions in SCR-system.

21 cl, 7 dwg

FIELD: transport.

SUBSTANCE: invention relates to cooling of SCR-system proportioners. Method of cooling of proportioner (250) related to SCR systems for exhaust gas purification whereat after stoppage of exhaust gas flow reducing agent proportioner (250) is cooled by reducing agent fed therein. Reducing agent feeder (230) is intermittently operated and operated at reduced power as compared with operation at normal operating conditions. Besides, invention relates to SCR system and vehicle (100, 110) equipped with such system. Also it relates to machine-readable carrier with computer program including program code for implementation of said process in compliance with claimed invention.

EFFECT: efficient cooling process.

21 cl, 7 dwg

FIELD: machine building.

SUBSTANCE: fluid medium transfer system comprises a flow-through device aimed at the reception of the fluid medium from a tank (2) and transfer of the fluid medium via the system and/or aimed at the measurement of the fluid medium amount transferred from the tank (2) to a spray cap (5), a controlled shutoff valve (9) installed before the spray cap (5) and preferably behind the flow-through device, and a control device (10). The control device (10) is used to control the shutoff valve (9) state so that the pressure of the fluid medium supplied to the spray cap (5) exceeds the first specified pressure limit (Pmin). Under the pressure below the first specified pressure limit (Pmin) the spray cap is able and will perform spraying, but spraying is usually not guaranteed as certain pressure difference at the spray cap (5) is required for spraying. An exhaust system comprising the fluid medium transfer system and method for fluid medium transfer are described.

EFFECT: higher precision of fluid medium dosing.

24 cl, 13 dwg

FIELD: transport.

SUBSTANCE: device (2) for vehicle (4) exhaust gases (20) aftertreatment by means of liquid reducing agent (18) delivery to exhaust gases (20) in exhaust pipe (32). The device (2) can locally heat surface (31) inside exhaust pipe with the help of Peltier element (6) using heating energy of exhaust gases (20) to evaporate liquid reducing agent (18) which reaches surface (31) and thus to prevent formation of reducing agent deposits inside exhaust pipe (32). Proposed invention also relates to method of vehicle exhaust gas aftertreatment using device (2) containing Peltier element (6).

EFFECT: higher speed of injected reducer evaporation and providing device operation at low temperatures of exhaust gases.

12 cl, 6 dwg

FIELD: engines and pumps.

SUBSTANCE: control device for an internal combustion engine includes the following: a solid particle sensor installed in an exhaust pipe of an internal combustion engine, a filter for catching particles, which can catch solid particles contained in exhaust gas and is located in the exhaust pipe at the point upstream relative to the solid particle sensor; an electronic control unit that can detect the amount of particles in the exhaust gas through the exhaust pipe in response to an output signal of the solid particle sensor; an electronic control unit having a possibility of supplying particle capture voltage between electrodes of the solid particle sensor during the first period so that a layer of particles can be formed on surfaces of electrodes of the solid particle sensor; and an electronic control unit having a possibility of stopping particle capture voltage supply during the second period so that the layer of particles can be maintained, and an electronic control unit that can perform control by detection of a failure in order to determine whether there is a failure of the filter for particle catching or not. The first period represents a period between completion of control by detection of the failure and the moment when the output signal of the solid particle sensor achieves a reference output signal. The second period represents a period between the moment when the output signal of the solid particle sensor achieves the reference output signal.

EFFECT: improved serviceability of a control unit and high measurement accuracy of the amount of solid particles.

9 cl, 7 dwg

FIELD: instrumentation.

SUBSTANCE: invention can be used for monitoring of a condition of the catalyst of the internal combustion engine exhaust gases. The method of assessment of the index (I) of aging of the catalytic device (K) consists in determination of the working temperature (T) of the catalyst. The aging factor (F) is determined against the working temperature (T), the period of time (t) during which the catalytic device was at a working temperature (T) is determined. Then the accompanying aging coefficient (C) is determined against the aging factor (F) and the period of time (t), and the total aging parameter (P) is increased by means of adding of the accompanying aging coefficient (C).

EFFECT: improvement of accuracy of determination of overall performance.

12 cl, 3 dwg

FIELD: transport.

SUBSTANCE: proposed air cleaner comprises vehicle structural part with air intake and air discharge hole, internal flow channel communicating air intake with air discharge hole and ozone cleaning element. Ozone cleaning element is applied on internal flow channel wall to clean ozone by converting it into other substances. Amount of applied ozone cleaning element on the side of air intake is larger than that applied on the side of air discharge hole. Thus, probability of active oxygen contact with activated carbon can be reduced.

EFFECT: creation of DOR-system to prevent deterioration of ozone cleaning function.

9 cl, 10 dwg

FIELD: transport.

SUBSTANCE: set of inventions relates to vehicle devices. Insert for holder in aftertreatment unit for exhaust gases of internal combustion engine contains bushing for treatment component intended for passing exhaust gases through it which gases should be treated, connecting facilities to hold insert in required position in holder, and seals for gas-tight sealing of bushing relative to holder. The seals contain O-ring on bushing to interact in self-aligning fitment engagement with opposite O-ring in the holder. The O-ring is located in angular notch of bushing, while connecting facilities contain threaded connection having male thread on the bushing for engagement with thread on holder, where external end of bushing has notch located at the periphery for connecting and disconnecting tool.

EFFECT: higher reliability of sealing in connection.

8 cl, 8 dwg

FIELD: engines and pumps.

SUBSTANCE: diesel system comprises diesel, NOx emission reducer arranged downstream of the engine, exhaust line between said engine and said NOx emission reducer. Besides, it comprises bypass line with first end connected to discharge line upstream of NOx emission reducer and bypass valve connecting discharge line with bypass line. Note also that said bypass valve directs offgas flow from discharge line into NOx emission reducer in open state and inhibits from discharge line into said reducer in closed state to allow the flow from discharge line into bypass line. Note that controller can be used for bypass valve opening and closing when engine operating conditions reach preset level.

EFFECT: efficient operation of NOx catalytic reduction unit or catcher.

19 cl, 1 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing cerium dioxide nanoparticles and use thereof. Described is a method of producing cerium dioxide nanoparticles with a given lattice, which contain at least one transition metal (M), wherein: (a) an aqueous reaction mixture is prepared, said mixture containing a source of Ce3+ ions, a source of ions of one or more transition metals (M), a source of hydroxide ions, at least one nanoparticle stabiliser and an oxidant which oxidises the Ce3+ ion to a Ce4+ ion, at initial temperature ranging from about 20C to about 95C; (b) mechanical shearing of said mixture and passing said mixture through a perforated sieve to form a homogeneously distributed suspension of cerium hydroxide nanoparticles; and (c) creating temperature conditions that are effective for oxidation of the Ce3+ ion to a Ce4+ ion to form a product stream containing cerium dioxide nanoparticles, containing a transition metal Ce1-xMxO2, where x assumes a value from about 0.3 to about 0.8, said nanoparticles have a cubic fluorite structure, average hydrodynamic diameter ranging from about 1 nm to about 10 nm and geometric diameter from about 1 nm to about 4 nm, wherein the nanoparticle stabiliser is water-soluble and has a value Log KBC ranging from 1 to 14, where KBC denotes a constant for binding the nanoparticle stabiliser to a cerium ion in water and said temperature conditions that are effective for oxidation of the Ce3+ ion to a Ce4+ ion include temperature from about 50C to about 100C. Described is a method of preparing a homogeneous dispersion containing stabilised crystalline nanoparticles of cerium dioxide with a given lattice, containing a transition metal, Ce1-xMxO2, where M is at least one transition metal and x assumes a value from about 0.3 to about 0.8; (a) preparing an aqueous mixture which contains stabilised cerium dioxide nanoparticles containing a transition metal, Ce1-xMxO2, having a cubic fluorite structure, wherein, wherein said nanoparticles have average hydrodynamic diameter ranging from about 1 nm to about 10 nm and geometric diameter less than about 4 nm; (b) concentrating said aqueous mixture containing said stabilised cerium dioxide nanoparticles containing a transition metal, thereby forming an aqueous concentrate; (c) removing essentially all water from said aqueous concentrate to form an essentially water-free concentrate of stabilised cerium dioxide nanoparticles containing a transition metal; (d) adding an organic diluent to said essentially water-free concentrate to form an organic concentrate of said stabilised cerium dioxide nanoparticles containing a transition metal; and (e) merging said organic concentrate with a surfactant in the presence of a nonpolar medium to form said homogeneous dispersion containing stabilised crystalline nanoparticles of cerium dioxide containing a transition metal, Ce1-xMxO2, where M and x assume values given above. Described is a deposited coating for the catalytic converter of the exhaust system of an internal combustion engine, where said deposited coating is obtained using said homogeneous dispersion.

EFFECT: catalyst that is efficient for a reduction or oxidation reaction is described, where said catalyst is obtained using said homogeneous dispersion.

44 cl, 9 dwg, 2 tbl, 8 ex

FIELD: engines and pumps.

SUBSTANCE: system 1 to process waste gases formed in operation of preset capacity ICE 2 comprises waste gas circulation pipeline 4. Waste gases flowing in said pipeline in direction 9 interact with turbosupercharger 5. Gause layer 6 is arranged upstream of said turbo supercharger. Cross section area of said layer exceeds averaged cross section area 8 of pipeline 4. Proposed system differs from known designs in that said gauze layer 6 comprises woven screen made up of thin wires 11 with major part of openings 12 features width 13 varying from 0.1 to 0.25 mm, said wires incorporating different types of thin wires of varying thickness.

EFFECT: longer life, higher efficiency.

9 cl, 4 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to carrier housing for catalytically active coat used for afterpurification of automotive exhaust gases. Carrier housing 1 with total surface area 7 that has one section 8 of the coat with catalytically active coat 2 comprising at least one type catalyst elements 32 dispersed on surface 35 of carrier housing1. Note here that: catalyst elements 32 features mean spacing 34 along the surface equal to at least 3 mcm, surface 35 has mean roughness depth Rz equal to 2 to 10 mcm. Carrier housing 1 features maximum increase in head drop equal to 25% as compared with smooth-surface housing. Method of producing above described carrier housing 1 with total surface area 7 with at least one section 8 with catalytically active coat 2, comprises the following steps: a) preparing carrier housing 1 with smooth surface (35); b) determining head drop for said housing at preset ambient conditions; c) producing surface (35) with mean roughness depth Rz, equal to 2 to 10 mcm. Carrier housing 1 features maximum increase in head drop equal to 25% as compared with smooth-surface housing; d) arranging catalyst elements (32) dispersed along the surface with mean spacing 34 of at least 3 mcm. Invention covers also exhaust gas purification device 25 incorporating at least one carrier housing 1 produced as described above, and transport facility incorporating said device.

EFFECT: improved conversion of harmful substances in afterpurification of exhaust gases.

20 cl, 10 dwg

FIELD: transport.

SUBSTANCE: invention relates to exhaust gas purification catalysts, particularly to adsorbent intended for removal of hydrocarbons from exhaust gases in cold starting. Proposed adsorbent represents an organometallic MOF-5-type carcass structure with residues of terephthalic or biphenyl dicarboxylic acid that makes a linking element. Points of cubical lattice comprise clusters that represent fragments of inorganic metallate oxide polyhedrons containing ions of zinc, or copper, or cobalt.

EFFECT: efficient hydrocarbons adsorbent.

1 tbl, 1 ex

FIELD: power industry.

SUBSTANCE: device for conversion of waste gas components of internal combustion engine with the help of at least one catalyst and/or particle filter, and/or particle trap and for levelling of relative movements between internal combustion engine and waste gas path and/or relative movements of different parts of waste gas path with the aid of at least one compensating pipe that allows relative movements. Note that at least one catalyst for waste gas components conversion and/or at least one particle filter and/or at least one particle trap is located inside the compensating pipe (20.1-20.8, 20.X, 20.Y, 20.Z) and/or inside the part of waste gas path that is integrated with compensating pipe (20.1-20.8, 20.X, 20.Y, 20.Z). The outer diametre of catalyst and/or particle filter and/or particle trap is less or equal to the inner diametre of compensating pipe (20.1-20.8, 20.X, 20.Y, 20.Z).

EFFECT: decrease of structural size.

15 cl, 7 dwg

FIELD: engines and pumps.

SUBSTANCE: invention relates to batching of reducing agent to ICE exhaust gases. Proposed process of batching the urea-based reducing agent to used gas flow fed to directed to cleaning system 30 comprises provision of batching module with batching housing 20 extending in axis X. Said offgas flow is fed to said batching housing 20 by forming a circular inlet jet AJ inclined relative to said axis X of said housing 20. Said reducing agent is batched by producing a sprayed urea-based reducing agent jet UWS inside said housing 20. Offgas flow is fed into said housing 20 by making an axially symmetric circular inlet jet AJ inclined to said axis X of said housing 20.

EFFECT: complete decomposition of urea, uniform mixing of ammonia with offgas.

9 cl, 5 dwg

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