Gas-flow silencers or exhaust apparatus for machines or engines in general and gas-flow silencers or exhaust apparatus for internal-combustion engines (F01N)

F01N              Gas-flow silencers or exhaust apparatus for machines or engines in general; gas-flow silencers or exhaust apparatus for internal-combustion engines (arrangements in connection with gas exhaust of propulsion units in vehicles b60k0013000000; combustion-air intake silencers specially adapted for, or arranged on, internal-combustion engines f02m0035000000; protecting against, or damping, noise in general g10k0011160000)(2625)

anagement device for internal combustion engine, emissioning emissions of white smoke // 2642710
FIELD: engines and pumps.SUBSTANCE: control device for the internal combustion engine includes an exhaust gas control device in the exhaust system of the internal combustion engine. The exhaust gas control device comprises an intake air volume regulator, a temperature sensor and an electronic control unit. The temperature sensor has the ability to measure the temperature of the exhaust gas control unit. The electronic control unit has the ability to estimate the amount of sulfur compound accumulation. The value of sulfur compound accumulation is the amount of sulfur compound accumulated on the exhaust gas control device. When a specific condition in which the value of the accumulation of sulfur compounds is equal to or above a predefined magnitude accumulation (S1) and the temperature of control device with exhaust gases is equal to or above the predefined temperature (S2) is satisfied in operational state, the electronic control unit manages the intake air volume regulator so that the intake air volume controller increases volume of suction air (S5) compared with, when a particular condition is not satisfied in the same operational state (S4).EFFECT: more accurate determination of the amount of sulfur compound accumulation.5 cl, 7 dwg

Exhaust gas control apparatus // 2642013
FIELD: engines and pumps.SUBSTANCE: invention relates to purification of internal combustion engine exhaust gases. Exhaust gas composition control apparatus includes an exhaust passage, a urea water tank, a urea adding valve, a urea pump, a pipe, and an electronic control unit. Electronic control unit is configured to drive the urea pump to perform a filling control when a condition requiring an execution of urea water addition to the exhaust gas in the exhaust passage by the urea adding valve is satisfied so that the pipe is filled with the urea water. Electronic control unit is configured to execute filling control when an exhaust pressure of the exhaust passage is equal to or less than a specified value. Electronic control unit is configured to stop the filling control when the exhaust pressure of the exhaust passage exceeds the specified value during execution of filling control.EFFECT: invention will enables to prevent pump operation associated with an unnecessary filling operation.4 cl, 2 dwg
Chamber silencer of noise of industrial vacuum cleaner // 2642011
FIELD: noise.SUBSTANCE: invention relates to noise suppression. Muffler contains a cylindrical body rigidly connected to the end inlet and outlet nozzles and partitions. There are at least two discs with holes installed perpendicular to the direction of motion of the aerodynamic flow in the case, these discs form the chambers. Holes of the disks are alternately displaced relative to the axis of the housing so, that the holes in two adjacent discs do not coincide. Discs are lined with sound-absorbing material at the side of the direction of the aerodynamic flow. Sound-absorbing structure of the lining of the inner cylindrical surface of the muffler body is of an annular type and comprises in its axial section a smooth and perforated surface, between which a multi-layer sound absorbing structure is arranged, having two layers: sound-reflecting layer adjoining the rigid wall, and sound-absorbing layer adjoining the perforated wall. Layer of sound reflecting material has a complex profile, consisting of evenly distributed hollow tetrahedrons, which enable to reflect sound waves coming in all directions.EFFECT: technical result is increase of efficiency of noise suppression.1 cl, 2 dwg

ulti-section noise suppressor // 2641993
FIELD: acoustics; manufacturing technology.SUBSTANCE: invention relates to noise suppression. Silencer comprises a cylindrical housing, end inlet branch pipe rigidly connected with central pipe, having perforation and forming with housing by means of perforated partitions in form of at least one coaxially arranged to housing and central pipe of additional perforated pipe and ends of all pipes are rigidly connected to housing by means of solid partitions, wherein one of them is rigidly connected with inlet branch pipe, and the other one is located on the opposite side of the branch pipe, a sound-absorbing element is arranged between the housing and the perforated pipe and in the end part of central pipe there is a sound-absorbing element locked by lock washer. Sound-absorbing element, overlapping the holes in the end part of the central pipe, is made of annular type and in the form of two perforated walls between which there is a sound-absorbing element, the sound-absorbing element being made of two-layered or multi-layered.EFFECT: higher efficiency of noise suppression.1 cl, 3 dwg

ulti-section silencer // 2641991
FIELD: acoustics; manufacturing technology.SUBSTANCE: invention relates to noise suppression. Silencer comprises a cylindrical housing, end inlet branch pipe rigidly connected with central pipe with perforation and forming with housing by means of perforated partitions in form of at least one coaxially arranged to housing and central pipe of additional perforated pipe, and ends of all pipes are rigidly connected to housing by means of solid partitions, wherein one of them is rigidly connected with inlet branch pipe and the other is located on the opposite side of the branch pipe, sound-absorbing element between body and perforated tube and in the end part of the central pipe, which is fixed with a lock washer, the porosity of the sound-absorbing element located between the body and the perforated pipe, 2.5…5.0 times below the porosity of the sound-absorbing element located in the end part of the central pipe.EFFECT: simplifying the design, increasing the efficiency of sound attenuation.1 cl, 2 dwg

Combined kochetov noise suppressor // 2641990
FIELD: acoustics; manufacturing technology.SUBSTANCE: invention relates to noise suppression. Silencer includes a body with end walls, an inlet and an outlet branch pipe and a sound attenuating element, made in the form of chambers filled with sound-insulating material, formed by coaxially installed perforated inserts with partitions and the inner surface of the housing, in the middle of the noise-damping element, along its perimeter, a container is opened, open on the airway side and formed by the inner surface of the housing and the end surfaces of the inserts, one of chambers comprises a partition movable in axial direction, said partition being shaped as cross section of chamber, and the movable baffle is rigidly connected to at least two guiding strips located on both sides of the diagonal of the cross section, interacting with grooves formed in the end surface of the insert, and a guide apron is attached to the movable partition, perpendicular thereto and along the entire perimeter, interacting with the inner surface of the insert. Noise-absorbing element is made in form of two perforated walls, between which a multi-layer sound-absorbing element is located, the multi-layer sound-absorbing element is made of two-layered, the layer adjacent to one of the walls is sound-absorbing, and adjacent to another perforated wall is made of a sound-reflecting material of a complex profile consisting of uniformly distributed hollow tetrahedra, which enable to reflect sound waves incoming from all directions. As a sound-absorbing material of the noise-damping element layer, a porous sound-absorbing ceramic material is used.EFFECT: higher efficiency of noise suppression.1 cl, 3 dwg

Gas flow noise suppressor // 2641985
FIELD: machine industry.SUBSTANCE: invention relates to machine building, particularly to noise suppressors. Suppressor incorporates a casing with an inlet and an outlet branch pipes, an installed coaxially to the casing hollow insert with a throttling element made from a porous noise absorbing material and a coil spring lined with sound absorbing material and placed between the insert and the body and forming a screw channel associated with the inlet pipe. Coils of the cylindrical helical spring in the axial section are made in the form of a rigid and perforated walls, between which there are two layers: a sound-reflecting layer adjacent to the rigid wall, and an acoustic-absorbing layer adjacent to the perforated wall, wherein sound reflecting material layer is made from complex profile composed of evenly distributed hollow tetrahedrons, allowing to reflect sound waves incident in all directions. Porous noise-absorbing material is used as the sound-absorbing material of cylindrical coil spring, having a bulk density of 500÷1000 kg / m3 and consisting of 100 pts. wt. of perlite with a particle diameter of 0.5÷2.0 mm, 100÷200 pts. wt. of one or more sintering materials and 10÷20 pts. wt. of binding materials.EFFECT: higher efficiency of noise suppression.1 cl, 2 dwg
Tubular noise suppressor // 2641984
FIELD: acoustics; manufacturing technology.SUBSTANCE: invention relates to noise suppression. Silencer comprises a cylindrical housing, rigidly connected with end inlet and outlet pipes, sound absorber located between cylindrical housing and perforated element, and an acoustically transparent material, placed between perforated element and sound absorber. Sound absorber is made in the form of a sound-absorbing element of the ring type and in the axial section is made in the form of a ring whose walls are made in the form of a rigid and perforated walls, a sound-reflecting layer adjoining the rigid wall, and a sound-absorbing layer adjoining the perforated wall, wherein sound reflecting material layer is made from complex profile composed of evenly distributed hollow tetrahedrons, allowing to reflect sound waves incident in all directions, and mineral wool is used on a basalt basis as a sound-absorbing material, according to the invention as a sound-absorbing material of a sound absorbing layer located between the cylindrical body and a perforated element, a porous sound absorbing ceramic material having a bulk density of 500÷1000 kg/m3, and consisting of 100 pts. wt. pearlite with a particle diameter of 0.5÷2.0 mm, 100÷200 pts. wt. of one or more sintering materials and 10÷20 pts. wt. of binding materials.EFFECT: higher efficiency of noise suppression.1 cl, 3 dwg

ethod of engine exhaust system operation and engine exhaust system of vehicle // 2641865
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

Catalytic particle filter // 2641814
FIELD: machine engineering.SUBSTANCE: filter contains a flow substrate including a plurality of channels. The plurality of substrate channels comprises a plurality of input channels having an open input end and a closed output end and a plurality of output channels having a closed input end and an open output end. The inner walls surface of the plurality of inlet channels comprise a thin layer of at least one input coating composition comprising at least one refractory metal oxide, an optionally stabilized rare earth metal oxide. The outer surfaces of the inner walls of the plurality of outlet channels comprise a thin layer of at least one composition of the wall outlet coating comprising at least one refractory metal oxide, optionally a stabilized rare earth metal oxide. Coatings of the inlet and outlet channels may contain at least one catalytically active metal selected from the group consisting of platinum, palladium, iridium, rhodium, silver, gold, mixtures of any two or more thereof. The outlet coating length along the axis is greater than the inlet coating length along the axis. The invention also provides an exhaust system 40 comprising a catalytic particle filter 8 in accordance with the invention.EFFECT: reliability increase.45 cl, 3 dwg

Internal combustion engine // 2641774
FIELD: engines and pumps.SUBSTANCE: internal combustion engine is provided with a hydrocarbon supply valve (15) located in the engine exhaust duct. When control of injection for injecting hydrocarbons from the hydrocarbon supply valve (15) for exhaust cleaning is stopped, in order to prevent plugging of the hydrocarbon supply valve (15), hydrocarbons are injected from the hydrocarbon supply valve (15) in hydrocarbons to prevent plugging when the engine does not produce soot, i.e. when fuel supply inside the combustion chamber (2) stops, and after hydrocarbons are injected for one time to prevent plugging, the injection of hydrocarbons to prevent plugging of the hydrocarbon supply valve (15) stops till the control of injection for exhaust cleaning is resumed.EFFECT: improved efficiency.6 cl, 11 dwg

ethod of engine operation (versions) // 2641423
FIELD: engines and pumps.SUBSTANCE: methods and system for controlling injection of water into the disconnected cylinders based on duration of engine operation in mode with one or several disconnected cylinders and the temperature of catalytic converter of exhaust gases are proposed. The invention enables to reduce saturation of catalytic converter with oxygen due to injection of water into disconnected cylinders, which expands and turns into steam, prevents air from getting into the disconnected cylinders and entering the catalytic converter.EFFECT: reduction of necessity for regeneration of catalytic converter of exhaust gases after disconnection of cylinders, prevention of decrease of catalytic converter efficiency, improvement of fuel efficiency and reduction of toxicity.18 cl, 8 dwg

System of diaphragm pump with possible refilling // 2641414
FIELD: engines and pumps.SUBSTANCE: system includes a diaphragm pump comprising of a suction port and a discharge port, a urea suction line communicating the urea source to the suction port through a liquid connection, and a urea discharge line in fluid communication with the discharge port. The recirculation line connects the liquid connection to the urea discharge line with the urea suction line and contains a flow controller operatively connected to it. The controller is capable of interpreting the state of loss of filling of the diaphragm pump and issuing a command to the flow controller in response to the state of loss of the fill, provides recirculation from the pump inlet port to the urea tank, ensuring a repeated filling of the pump.EFFECT: improvement of the diaphragm pump system.22 cl, 3 dwg

ethod for regeneration of particulate filter // 2641325
FIELD: engines and pumps.SUBSTANCE: method for regeneration of particulate filter during the use of the engine producing exhaust gases, in which the first part of the process is carried out by exhaust gases, which comprises the following steps: (a) estimating consumption of fuel to be added to the exhaust gases to reach the required temperature; (b) adding fuel with said consumption rate to the exhaust gases; (c) combusting at least a portion of said fuel in said exhaust gases to increase the temperature of exhaust gases; (d) monitoring the value of exhaust gases temperature and comparing it with required temperature to determine the value of deviation; and (e) storing the value of deviation determined at step d in the memory device; then the second part of the regeneration process is carried out, which includes stage (f) of the step (a) with application of stored value of deviation for correcting the estimated value of fuel consumption, which must be added to the exhaust gases to reach the required temperature.EFFECT: increased reliability.15 cl, 12 dwg

Vehicle engine (versions) and vehicle comprising such engine // 2641181
FIELD: transportation.SUBSTANCE: engine comprises an engine oil reservoir, an exhaust system, and a thermoelectric device. The exhaust system is made with the possibility to remove exhaust gas from the engine, and the thermoelectric device is connected to a power source and has a hot and a cold side. The hot side interacts with the exhaust engine gas, and the cold one - with the engine oil reservoir. The engine oil reservoir has an inner surface portion including one or more fins facilitating heat exchange with the thermoelectric device. The vehicle engine versions and the vehicle are disclosed.EFFECT: increasing the fuel economy and increasing the speed of warming up the vehicle engine.37 cl, 1 dwg

Control device for internal combustion engine // 2640867
FIELD: engines and pumps.SUBSTANCE: internal combustion engine includes an exhaust gas monitoring device disposed in the exhaust passage of the internal combustion engine and a fuel supply device configured to supply fuel to the exhaust gas monitoring device. The control device contains an electronic control unit. Electronic control unit with control of the fuel supply fuel supply device for regeneration control in such a way that the temperature of the exhaust gas control devices rises and particulates, besieged at exhaust control device burn out. The electronic control unit provides the temperature increase exhaust control devices the first-speed increase in temperature for regeneration control when the temperature of the exhaust gas control devices is in the first temperature range. The electronic control unit provides an increase in the temperature of the exhaust gas monitoring device with a second rate of temperature increase as regeneration control when the temperature of the exhaust gas monitoring device is in the second temperature range. The second rate of temperature rise is lower than the first temperature increase rate, and the second temperature range is higher than the first temperature range. The electronic control unit provides the conditions for burning solid particles by maintaining the temperature of the exhaust gas monitoring device in the third temperature range as regeneration control when the temperature of the exhaust gas monitoring device is in the third temperature range. The third temperature range is higher than the second temperature range. The electronic control unit provides control of temperature control devices, exhaust gas at idle mode of operation so that it is equal to or less than the temperature of the exhaust gas control devices at a time when the engine internal combustion engine is included in the status of idling operation mode to manage the prevention of temperature increase when the temperature of the emission control devices during the regeneration control is the second temperature range and internal combustion engine is in idle state.EFFECT: preventing the formation of white smoke when the engine is idle.6 cl, 10 dwg

ethod for calibrating nox emissions at engine and diesel engine output and control system // 2640148
FIELD: engines and pumps.SUBSTANCE: obtaining the state of one or more post-processing devices and controlling one or more parameters of an engine to increase or reduce NOx emissions at the engine output based on the state of particular or each post-processing device, at that obtaining the state of a specific or each post-processing device includes the step of measuring or evaluating the sulphur contamination of the post-processing device, or the level of fuel in the oil, or the accumulation efficiency of the NOx accumulation device, or the level of additive in the tank at the outlet of the engine.EFFECT: emissions rate management.9 cl, 2 dwg

System and method of heating of urgent injection systems (versions) // 2640137
FIELD: engines and pumps.SUBSTANCE: reductant supply system is designed to supply the reducing agent to the exhaust aftertreatment system of the engine heated during cold temperature conditions. Heat transfer agent flows through the heat path, which ensures a flow path from the heat source to the feeder, water flows out of the tank for the storage of the reductant and the storage tank of the reductant to heat source. Control valve regulates the flow of the heat transfer agent in the heat transfer circuit, so that at least one heat cycle provides circulation period, which exceeded low reducing agent in detergent compartment and storage tank, and the period ending where circulation stops until it reaches the lower limit temperature reducer in the feeder.EFFECT: increase of economy and ecological compatibility.20 cl, 7 dwg

otor vehicle noise suppressor // 2639636
FIELD: transportation.SUBSTANCE: suppressor comprises an inlet expanding branch pipe(1) and a tapered outlet branch pipe (2) inside which perforated plates (3) and (4) are installed respectively, in the inlet branch pipe (1) diverging in the direction of flow, and in the outlet branch pipe (2) converging on along the flow course. Between the inlet (1) and the outlet (2) branch pipes there is a straight middle section (5) provided with perforated plates (6) arranged in rows in the direction of the flow. The suppressor is located in a jacket (7) with formation of a closed cavity (8) along the entire outer surface of the suppressor and fixed by perforated plates (9) to the side walls of the suppressor. The cavity (8) between the suppressor and the jacket (7) communicates with system for feeding liquid in its upper part and discharging it from the lower part to adjust pressure in the cavity. The system is associated with air damper control of the engine depending on the engine rpm by means of a control unit (19) and air damper control system (20).EFFECT: allows to reduce noise of the exhaust gas stream, improve technical characteristics of the engine during operation.4 cl, 2 dwg

Noise silencer of bushing type // 2639420
FIELD: machine engineering.SUBSTANCE: silencer comprises a cylindrical perforated body with a groove, in which a sound-absorbing element is placed, and a casing enclosing the sound-absorbing element with a gap forming an expansion chamber, the casing is provided with a longitudinal slit for discharging air and mounted for turning about the body axis. The sound-absorbing element is made of a sound-reflecting material, a complex profile consisting of uniformly distributed hollow tetrahedrons, and the cross-section of the sound-absorbing element is in the form of symmetrically arranged perforated walls, between which there is a sound-absorbing element arranged in the form of three layers: a central layer of a sound-reflecting material, a complex profile consisting of uniformly distributed hollow tetrahedrons for reflecting sound waves incident in all directions, and sound-absorbing layers of different density materials and symmetrically adjacent thereto, the sound-absorbing material is either a sound-absorbing sheet material or a porous sound-absorbing ceramic material.EFFECT: improved noise silencing efficiency with simultaneous setting of gas flow discharge direction and simplified design of the silencer.3 dwg

Device for removing exhaust gases and method to control removal of exhaust gas of internal combustion engine // 2638702
FIELD: engines and pumps.SUBSTANCE: control system for removing exhaust gas is intended for internal combustion engine (1) equipped with a control device for removing exhaust gas. The control device for removing exhaust gas includes an addition mechanism (200) and a catalyst (41). The addition mechanism (200) is designed for adding an aqueous urea solution to exhaust gases. The catalyst (41) is arranged for adsorbing ammonia obtained from urea aqueous solution and removing NOx with the use of adsorbed ammonia. The control system for removing exhaust gas comprises an electronic control unit (80). The electronic control unit (80) sets the target amount for adsorbed ammonia that is adsorbed by the catalyst (41). The electronic control unit (80) controls the added amount of urea aqueous solution based on the target amount of adsorbed ammonia. The electronic control unit (80) receives catalyst temperature value. The electronic control unit (80) performs the integration process to obtain the catalyst temperature value in the present cycle and for integration of catalyst temperature, when it is equal to or higher than the threshold value determined in advance. The electronic control unit (80) performs the initialisation process for reducing the amount of ammonia adsorbed by the catalyst provided by that the integrated value of catalyst temperature calculated in the integration process is equal to or higher than the present value. The method to control the exhaust gas discharge of the internal combustion engine is disclosed.EFFECT: suppression of difference increases between the target amount of adsorbed ammonia and the actual amount of adsorbed.6 cl, 7 dwg

Tubular noise silencer // 2638256
FIELD: machine engineering.SUBSTANCE: silencer comprises a cylindrical body rigidly connected to the end inlet and outlet branch pipes, a sound absorber placed between the cylindrical body and a perforated element and an acoustically transparent material interposed between the perforated element and the sound absorber. The sound absorber is made in the form of sound-absorbing element of annular type, which walls are made in the form of the rigid and the perforated walls, between which there are two layers: the sound-reflecting layer adjacent to the rigid wall and the sound-absorbing layer adjacent to the perforated wall. The layer of sound-reflecting material is made of a complex profile consisting of uniformly distributed hollow tetrahedrons allowing to reflect the sound waves incident in all directions, or the sound absorber is made in the form of a sound-absorbing element of an annular type, which walls are made in the form of rigid and perforated walls, between which the layers of sound-reflecting and sound-absorbing materials of different density are arranged in two layers. The layers of sound-reflecting material are made of complex profile consisting of uniformly distributed hollow tetrahedrons allowing to reflect sound waves incident in all directions, and which are located, respectively, at rigid and perforated walls, and the layers of the sound-absorbing material are made of a heat-insulating material capable to maintain the preset microclimate in the room, the sound-absorbing material used is a sheet-noise protective material which is made on the basis of a magnesia binder with a reinforcing glass cloth or a fiberglass mat, or a polyester, or a porous sound-absorbing ceramic material of a bulk density of 500÷1000 kg/m3 and consisting of 100 wt. parts of perlite with a grain diameter of 0.1÷8.0 mm, 80÷250 parts by wt. parts of one of sintering materials selected from group including slag, quartz, varnish, stones or clay as a base material, 5÷30 wt. parts of inorganic binder parts. After sintering, the mixture of perlite particles form communicating holes between their contacting surfaces, so that the internal pores communicate with each other.EFFECT: improved efficiency of noise suppression.4 dwg

ethod to control turbocharged engine (versions) and control system of turbocharged engine // 2638223
FIELD: engines and pumps.SUBSTANCE: methods and systems for reducing turbocharger delay in the turbocharged engine are proposed. A boost tank connected to the engine can be charged with compressed sucked air and/or combustion exhaust gases. The pressurised charge can then be released when the accelerator pedal is pressed into inlet or outlet manifold.EFFECT: compensation of turbocharger delay.17 cl, 8 dwg
Sound absorbing acoustic fencing // 2637593
FIELD: construction.SUBSTANCE: fencing comprises a profiled wall and a perforated wall, between which a layer of a sound-absorbing material is placed. One of the walls is made smooth, and the absorbent material is arranged in two layers, one of which, a harder one, is made continuous and profiled, and the other, a soft one, is made discontinuous and arranged beneath the surfaces of the first layer. The fencing comprises a frame, window and door openings, apertures to accommodate lighting fixtures, and acoustic fencings comprising the smooth and perforated walls, between which an absorbent material is placed, arranged in two layers, one of which, a harder one, is made composite, consisting of alternating spherical surfaces and flat surfaces with resonant openings, and the other, a soft one, is made discontinuous in the form of discontinuous sound absorbers and is arranged in the focus of the sound reflecting surfaces of the first layer. The composite layer is made of a sound-absorbing material, whose sound reflection coefficient is greater than the sound absorption coefficient, and the discontinuous sound absorber located in the focus of the composite layer is made in the form of rotation bodies, such as a sphere, an ellipsoid, a cone, a truncated cone, and is fixed on the perforated wall by means of pins, one end of which is rigidly fixed to the perforated wall, and the other is made pointed and arranged in the body of the discontinuous sound absorbers.EFFECT: increasing the noise absorption efficiency.5 dwg

Tubular rectangular noise silencer // 2637592
FIELD: machine engineering.SUBSTANCE: silencer has a housing of rectangular section rigidly connected to the end inlet and outlet branch pipes, a sound absorber located between the perforated element and the sound absorber, and an acoustically transparent material located between the perforated element and the sound absorber. The sound absorber is in the form of a sound-absorbing element of rectangular section, which walls are in the form of rigid and perforated walls, between which two layers are arranged: a sound-reflecting layer adjacent to the rigid wall, and a sound-absorbing layer adjacent to the perforated wall. The layer of sound-reflecting material is made of a complex profile consisting of uniformly distributed hollow tetrahedrons, which can reflect sound waves incident in all directions, or the sound absorber made in the form of a sound-absorbing element of rectangular section, which walls are made in the form of rigid and perforated walls, between which the layers of acoustic reflection are arranged, and the sound-absorbing materials of different density arranged in two layers. The layers of sound-reflecting material are made of complex profile consisting of uniformly distributed hollow tetrahedrons, which allow to reflect sound waves incident in all directions and which are located respectively near the rigid and perforated walls, and the layers of the sound-absorbing material are made of a heat-insulating material configured to maintain the present microclimate in the premise, the sound-absorbing material used is a sheet noise-protective material, which is based on magnesia binder with a reinforcing fibre or fiberglass mat, or a polyester, or porous sound-absorbing ceramic material, having bulk density from 500÷1000 kg/m3 and consisting 100 wt. parts of pearlite with grain diameter from 0.1÷8.0 mm, 80÷250 wt. parts of one of the sintering materials selected from the group including fly ash, slag, quartz, varnish, stone or clay as a base material, 5÷ 30 wt. parts of nonorganic binder. After sintering, the mixture of perlite particles form communicating holes between their contacting surfaces, so that the internal pores are communicating with each other.EFFECT: increase the efficiency of noise suppression.4 dwg

Internal combustion engine with liquid cooling and method of internal combustion engine operation // 2637160
FIELD: engine devices and pumps.SUBSTANCE: liquid-cooled internal combustion engine comprises at least one cylinder block head (1) which is connected to mounting surface of a cylinder block (14). The cylinder block head (1) comprises at least one integrated cooling jacket (16a), (16b). The internal combustion engine has four cylinders arranged in row along longitudinal axis of the cylinder block head (1). Each cylinder has at least one exhaust opening for discharging exhaust gases from the cylinder through an exhaust discharge system, whereby a exhaust pipe is connected to each opening. The exhaust pipes of cylinders are united in series into combined exhaust pipe. The corresponding at least one exhaust pipe of the outermost cylinder and at least one exhaust pipe of the adjacent inner cylinder are combined in the cylinder block head (1) into partial exhaust pipe (6), forming a partial exhaust manifold (10a), (10b) before two partial exhaust pipes (6) of four cylinders are united from outside cylinder block head (1) into combined exhaust pipe. The exhaust discharge system leads to the outside of the cylinder block head (1) in the form of two exhaust openings (15a), (15b) for exhaust gas discharge. The two exhaust openings (15a), (15b) are offset and spaced apart along the longitudinal axis of the cylinder block head (1) and have identical spacing from the mounting surface (14). The lower cooling jacket (16a) is located between the exhaust pipes and the mounting surface (14) of the cylinder block head (1). The upper cooling jacket (16b) which is located on the side of the exhaust pipes opposite the lower cooling jacket (16a). At least one joint (13) is provided between the lower cooling jacket (16a) and the upper cooling jacket (16b) and serves to pass the coolant. At least one joint (13) is located adjacent to the partial exhaust pipe (6). A method of the internal combustion engine operation is disclosed.EFFECT: improved cooling of the engine, in which the exhaust pipes are partially located in the cylinder block head.17 cl, 2 dwg

Exhaust system discharge system (versions) // 2637157
FIELD: engine devices and pumps.SUBSTANCE: exhaust gas discharge system comprises an exhaust gas nozzle for exhaust gas restorer arranged upstream from a mixer. The mixer comprises a plurality of concentrically smaller rings (202), (206), (208), (228) interconnected with ribs (213), (214), (215). The ribs (213), (214), (215) have a width varying in the direction of flow. The ribs (213), (214), (215) are arranged annularly. The first set of ribs (213) between a first pair of adjacent rings (204) and (206) is angularly offset from a second set of ribs (214) between the second pair of adjacent rings (204) and (206). The first and second pairs of rings have one common ring. Embodiments of exhaust gas discharge system are disclosed.EFFECT: possibility to mix the exhaust gas flow at a shorter distance.20 cl, 17 dwg

ethod for engine (versions) and engine system // 2636977
FIELD: engine devices and pumps.SUBSTANCE: method for the engine 200 having a plurality of cylinders (C1), (C2), (C3), (C4) is that during the first states, the ignition is performed in a subset of the cylinders (C2), (C3) and all exhaust gases are directed from the subset of the cylinders through a first manifold (234) connected directly to a catalytic converter (208), rather than to a turbo-supercharger (206). During the second states, the first part of the exhaust gases from all the cylinders is directed through a second manifold (236) connected to the turbo-supercharger (206) in all cylinders (C1), (C2), (C3), (C4), and a second part of the exhaust gases from only the subset of the cylinders (C2), (C3) is directed through the first manifold (234). The first states are the engine temperature (200) below the threshold value. The second states are the engine temperature (200) above the threshold value and the engine load from medium to high. An embodiment of the method for the engine and the engine system are disclosed.EFFECT: achievement of faster heating of the catalytic converter.20 cl, 6 dwg

Exhaust gas control device for internal combustion engine // 2636600
FIELD: engine devices and pumps.SUBSTANCE: engine (1) includes an engine inlet (6), a throttle valve (10), an engine exhaust (12a), a turbocharger (7) driven by an exhaust system, a high pressure side (16H) channel for recirculating exhaust gases on the high pressure side, channel (16L) for exhaust gas recirculation on the low pressure side, a control valve (17H) for exhaust gas recirculation on the high-pressure side, a control valve (17L) for recirculating exhaust gases on the low-pressure side. The exhaust gas control unit includes an electronic control unit (30) configured to control the mixture enrichment to temporarily degrade the air-fuel mixture of exhaust gas by injecting additional fuel into the cylinder during expansion stroke or exhaust stroke when the opening ratio of throttling valve (10) switches from the basic throttle opening degree to the throttle opening ratio to control the mixture enrichment below the basic throttle opening degree. The ratio of exhaust gas recirculation on the high-pressure side is switched from the base ratio of exhaust gas recirculation on the high-pressure side to the exhaust gas recirculation ratio on the high-pressure side to control the mixture enrichment, different from the base ration. The ratio of exhaust gas recirculation on the low-pressure side is switched from the base ratio of the exhaust gas recirculation on the low-pressure side to the exhaust gas recirculation ratio on the low-pressure side to control the mixture enrichment, different from the base ratio. The electronic control unit (30) is configured to initiate the mixture enrichment control by controlling the opening ratio of the control valves (17H) and (17L), switching the throttle opening ratio to control the mixture enrichment, and then initiating the injection of additional fuel.EFFECT: suppression of the risk of ignition misfire, when the control of mixture enrichment is initiated.9 cl, 38 dwg

Internal combustion engine turbosupercharge control device // 2636362
FIELD: engines and pumps.SUBSTANCE: device comprises a turbocharger (1) with a turbine (2), which input is connected to output manifold (6) of the engine, and a compressor (3), which output is connected through a cooler 4 and a throttle valve 5 to the input manifold (6), a catalyst (9), which input is connected to turbine output (2), a control unit (10), controllable liquid injection module (16) installed in engine output branch pipe (17) before the turbine input (2), and a supercharging controller (19) connected to information bus (20) control unit (10). The information inputs of the unit (10) are electrically connected to temperature and pressure sensors (11) installed at compressor input (3), at the throttle damper (5) input, at the input manifold (6), at a block of cylinders (12) and output manifold (13) of internal combustion engine, as well as with exhaust gases emission control sensors (14) installed at the input and output of catalyst (9). The control input of the unit (10) is connected to accelerator sensor (15), and its control output is connected to the throttle damper (5). The information inputs of pressurisation controller (19) are connected to temperature and pressure sensors (11) installed at the input of the throttle damper (5), the engine output manifold (6), and at input and output of the turbine (2). The control output of the controller (19) is connected to the control input of controlled liquid injection module (16).EFFECT: improved engine control dynamics and reduced toxicity.7 cl, 1 dwg

Fault diagnostics device and method for fault diagnostics // 2636359
FIELD: machine engineering.SUBSTANCE: amount of reductant, adsorbed on the NOx catalytic converter, when the reductant supply device is in good order, and the corresponding detected value are estimated. The corresponding detected value is detected by the NOx sensor, and the detected value corresponds to each amount of reductant, adsorbed on the NOx catalytic converter. When the estimated adsorption value is greater than or equal to the first value and is less than or equal to the second value, diagnostics of the NOx catalytic converter based on the detected value of the NOx sensor is prohibited. The first value is the amount of adsorbed reductant corresponding to the minimum value of the corresponding detected value. The second value is the amount of the adsorbed reductant corresponding to the corresponding detected value when the amount of adsorbed reductant is zero and greater than the first value.EFFECT: preventing the decrease in the accuracy of diagnostics.8 cl, 24 dwg

Reducing agent supply system // 2635731
FIELD: engines and pumps.SUBSTANCE: reducing agent supply system comprising an injection valve, a pump made with the possibility to supply the reducing agent to the injection valve and to pump out the reducing agent back, and an electronic control unit. The electronic control unit actuates the valve element to perform an operating stroke with closing and opening in such a manner that the operation of closing and opening the injection opening of the injection valve is performed predetermined number of times after the command to stop the internal combustion engine is issued. During internal combustion engine operation, the electronic control unit calculates the amount of substances generated during the operation of internal combustion engine. Such substances cause accumulation of deposits on the edge of the injection opening of the injection valve. The electronic control unit sets the increased number of times of closing and opening operation of the injection opening of the injection valve at the increase of calculated amount of produced substances, when a command to stop the internal combustion engine is issued.EFFECT: use of invention will allow to prevent clogging of the injection opening of the injection valve due to solidification of deposits sucked into the injection opening after the command to stop the internal combustion engine is issued.2 cl, 7 dwg

Electrically heated catalytic converter // 2635730
FIELD: engines and pumps.SUBSTANCE: electrically heated catalytic converter includes a substrate made of ceramic. The substrate includes a catalyst-coated layer; electrode films (2) made of ceramics. Electrode films (2) are arranged on the substrate surface. Electrode leads (3) made of ceramics are attached to the corresponding electrode film (2). The outer electrodes (5) are attached to the corresponding electrode lead (3) through hard metal solder (4). The thermal expansion coefficient of the hard metal solder (4) is equal to or greater than the thermal expansion coefficient of the electrode leads (3) and equal to or less than the coefficient of thermal expansion of the outer electrodes (5). The thermal expansion coefficient of each of the electrode leads (3) decreases from the area where the electrode lead (3) is connected to hard metal solder (4), to the area where the electrode lead (3) is connected to the corresponding electrode film (2).EFFECT: production of electrically heated catalytic converter which is adapted to reduce damage at interface between the components of converter due to the difference of thermal expansion coefficient between the components.6 cl, 5 dwg

Device for feeding urea aqueous solution and method of feeding urea aqueous solution for internal combustion engine // 2635722
FIELD: engines and pumps.SUBSTANCE: urea aqueous solution feeding device for an engine is provided with a tank that stores urea aqueous solution, an injector configured for introducing urea aqueous solution into exhaust gases, and a pipeline configured to feed the urea aqueous solution in the tank to the injector. When the pressure of the urea aqueous solution supplied to the injector is equal to or less than the predetermined pressure, and the volume of urea aqueous solution in the tank is equal to or less than the present threshold value, electronic control unit determines that the urea aqueous solution in the volume required to cool the injector cannot be supplied from the tank to the injector, and performs return control for returning the urea aqueous solution from the injector back to the tank. Method for feeding urea solution into exhaust gases is proposed.EFFECT: corrosion wear of the injector is reduced when using the invention.6 cl, 7 dwg

Injector cooling systems and methods for liquid injection systems in exhaust diesel engine systems // 2634983
FIELD: engine devices and pumps.SUBSTANCE: supply system of fluid for exhaust systems of diesel engines or of another reducing agent is provided to an atomizer for injection into the system for further purification of engine exhaust gases. The atomizer contains an injector assembly that thermally protects the fluid for the exhaust systems of diesel engines from exhaust gas temperatures. Also, methods of supplying liquid for exhaust systems of diesel engines for cooling the injector prior to operation of the atomizer are provided to reduce emissions.EFFECT: reduced toxicity of exhaust gases.26 cl, 11 dwg

System for heating urea injection systems (variants) // 2634980
FIELD: engines and pumps.SUBSTANCE: reducing agent supply system is designed to supply the reducing agent to the engine exhaust gas postprocessing system, heated during cold temperature conditions. The heat carrier medium flows through a heat exchange circuit, providing a flow path from the heat source to a doser, from the doser to the reducing agent storage tank and from the reducing storage tank to the heat source. The control valve controls the flow of the heat carrier medium in the heat exchange circuit so that at least one heat exchange cycle provides a circulation period, in which the temperature of the reducing agent in the doser and storage tank is exceeded and the termination period in which the circulation ceases until the lower limit of the temperature of the reducing agent in the doser.EFFECT: when using the invention, the system for maintaining the temperature of the reducing agent is improved.20 cl, 7 dwg

Exhaust gas cooling system for internal combustion engine // 2634646
FIELD: engine devices and pumps.SUBSTANCE: exhaust gas cooling system for internal combustion engine contains a catalytic converter (20) for cleaning exhaust gases installed in an exhaust channel (9) the internal combustion engine (1), a cooling module, a heat transfer portion, a curved section (9b), and a heat-suppressing portion (12a, 13a). The cooling module, which is an adapter (10), is arranged to cool the exhaust channel (9) before the catalytic converter (20). The heat-transmitting portion, which is a gasket 11, is designed so that transfer of heat between an outlet passage after the place cooled by the cooling module and the cooling module is prevented. The curved section (9b) is in the outlet channel (9) between the heat-transfer portion and the catalytic converter (20). The heat-suppressing portion is arranged in the curved section (9b) and arranged to suppress the radiation of heat transmitted from exhaust gases flowing in the curved section (9b) into the atmosphere around the curved section through the walls of the channel curved section forming the curved section. The curved section (9b) includes an inner curved section having a relatively small radius of curvature and an outer curved section having a relatively large radius of curvature in cross-section including a central axis in the longitudinal direction of the discharge channel. The heat-suppressing portion (12a, 13a) is formed on the inner curved section and on the outer curved section. The heat-suppressing portion (12a, 13a) is formed so that the heat radiation suppression capability of the heat-suppressing portion of the inner curved section is greater than the heat radiation suppression capability of the heat-suppressing portion of the outer curved section. The versions of the exhaust gas cooling system are disclosed.EFFECT: suppression of the exhaust gas temperature decrease in operation of the internal combustion engine in low-load region, when the temperature of the exhaust gas at the time of exhaust from the internal combustion engine is relatively low.21 cl, 21 dwg

Device for reduction of emissions in exhaust gases of internal combustion engine // 2634459
FIELD: engines and pumps.SUBSTANCE: device contains an electric field source connected to the on-board power source, high-voltage electrodes connected to the outputs of the electric field source. The device is located behind the exhaust manifold and is designed as a vortex ejector containing a vortex chamber with a tangential nozzle twist device and an electric discharge chamber with high-voltage electrodes. The electrodes are installed on the outer end wall of the slotted confuser. The vortex chamber is connected to a tangential nozzle twist apparatus and an outlet nozzle communicating with the atmosphere. The tangential jet nozzle contains two inlet branch pipes, one of which is connected to the exhaust manifold, and the other branch pipe is located on the end wall, in the axial zone, coaxially with the central axis of the vortex chamber, with an outlet that is smaller than the diameter of the vortex chamber and connected to electric discharge chamber of the vortex type with a tangential nozzle twisting device, made in the form of an axisymmetric slot confuser connected in the peripheral part with the atmosphere. In the axial part of the slit the confuser is interfaced with a branch pipe that opens into the vortex chamber.EFFECT: effective cleaning of exhaust gases by using their potential energy.3 cl, 3 dwg

ethod of engine exhaust, system and method for engine // 2633329
FIELD: engine devices and pumps.SUBSTANCE: engine exhaust reduction method includes a step of adjusting the fuel injection output based on the partial oxidation state of the catalytic converter. In this case, the partial oxidation state is based on the reaction rates of a plurality of exhaust gas particles along the longitudinal axis of the catalytic converter and a set of axial averaged mass balance and energy balance equations for the fluid phase and the porous catalytic converter coating. Also, a method variation for reducing engine exhaust and a system for reducing engine exhaust are proposed.EFFECT: reduction of treatment resources for the catalytic converter model, improvement of emission control by maintaining the catalytic converter in the required partial oxidation state.20 cl, 7 dwg

Silencer for a vehicle // 2633274
FIELD: engine devices and pumps.SUBSTANCE: silencer for a vehicle with housing (15, 16.1, 16.2), which contains at least one inlet spigot (13.1, 13.2, 13.3, 13.4) and at least one outlet spigot (17.1, 17.2, 17.3, 17.4). Silencer is designed to separate in its interior into exhaust gas chambers. Pipe system (18.1, 18.2, 18.3, 18.4) can be installed in these chambers, which is connected to at least one inlet spigot (13.1, 13.2, 13.3, 13.4) and at least one outlet spigot (17.1, 17.2, 17.3, 17.4) of silencer, as well as the bases (14.1, 14.2, 14.3, 14.4), which can be connected to the pipe system (18.1, 18.2, 18.3, 18.4) as the constituent parts (18.1, 18.2, 18.3, 18.4) of the pipe system to establish the path of exhaust gas.EFFECT: providing rigid fixation of pipes, reducing the problems associated with different thermal expansion and different directions of thermal expansion.10 cl, 6 dwg
Device for catalytic cleaning of exhaust gases of internal combustion engine // 2633255
FIELD: engine devices and pumps.SUBSTANCE: device contains a catalytic converter consisting of a body with an inlet and an outlet cones, an inlet and an outlet branch pipes and a perforated unit of catalyst and a distributor of exhaust gas flow located inside the body. The exhaust gas flow distributor is made in form of a plate located at the outlet of catalyst unit for displacement along the axis of catalyst converter. The plate is kinematically connected with the outlet cone and/or outlet branch pipe of the body of the catalytic converter by means of a mechanism of movable fastening.EFFECT: increase efficiency of purification from toxic substances to levels complying with the perspective ecological regulations due to reduction of overall dimensions and extension of service life of devices for toxicity reduction.4 cl, 9 dwg

Trifunctional catalyst for use in vehicle exhaust gases and exhaust gas purification system // 2632877
FIELD: chemistry.SUBSTANCE: invention relates to a trifunctional catalyst for use in vehicle exhaust gases having a catalyst comprising a mixture of nickel and copper on a carrier, said carrier being inert to nickel and copper. The nickel mentioned is contained in said carrier in an amount of from about 4 to about 20 wt %, and wherein said copper is contained on said carrier in an amount of from about 0.04 to about 10 wt %, said catalyst not containing precious metals. The invention also relates to a vehicle exhaust gas purification system.EFFECT: increased effectiveness of the declared catalyst, reduced concentration of CO, HC and NOx emissions, and increased ability to accumulate oxygen and water gas convertion.17 cl, 13 dwg, 4 tbl, 4 ex

Sound absorber // 2632562
FIELD: physics.SUBSTANCE: sound absorber contains a frame made in the form of perforated walls, between which layers of sound-absorbing material are placed. The frame is made in the form of two outer perforated walls and an inner, a middle wall, made in the form of a membrane resonant plate, between which layers of sound-absorbing material are placed. The frame is made symmetrical with respect to the middle wall, which divides it into two congruent parts, each of which has three layers of sound-absorbing material, more rigid, the first layers are made solid, profiled and fixed respectively on the outer perforated walls, the second layers, softer than the first, are made discontinuous and are located with a gap in the focus of the sound-reflecting surfaces of the first layers, the second ones are made in the form of rotation bodies in the form of cones connected by bases, and the first layers are made of a material with a sound reflection coefficient greater than its sound absorption coefficient in the form of profiles of conical surfaces which focus the reflected sound on the second layers, the third sound-absorbing layers are made of foam sound-absorbing material in the form of a construction sealing foam and are located in the gaps and cavities formed between the first and second layers. Each of the outer perforated walls is rigidly connected to the corresponding second layer by means of vertical fastening elements perpendicular to it, made in the form of plates, one end of which is rigidly fixed to the outer perforated wall, and the second end is made in the form of clamps covering the rods and compression screws, respectively, wherein the rods are parallel to the perforated walls, and the middle wall, made in the form of a membrane resonant plate, is rigidly connected to the frame by the construction sealing foam located in the gaps and cavities of the frame.EFFECT: increased efficiency of noise absorption at low and medium frequencies.4 cl, 2 dwg

Gas flow control device for cleaning particulate filter // 2632071
FIELD: machine engineering.SUBSTANCE: gas flow control device (50) for cleaning the particulate filter (18) can be connected to one side of the filter (18) for the through gas flow, used to clean the filter (18). The controller (50) is the stand-alone device, configured to removable mounting in case of cleaning purposes. The controller (50) contains the housing (52), forming the gas flow passage and the control element (51), disposed within the housing (52). The control element (51) contains the passing through part, comprising at least one hole (55, 55a) for the through gas flow, and the locking part, that can overlap the part of the passing through filter section (18), so as to allow the gas flow at least through one hole (55, 55a). The control element (51) is movable at least between two different positions, and the indicated at least one opening (55, 55a) covers the various parts of the passing through section in various positions of the control element (51).EFFECT: whole filter piece by piece effective cleaning.29 cl, 10 dwg

ethod for engine (versions) and engine system // 2632068
FIELD: engines and pumps.SUBSTANCE: method includes stages of adjusting the fuel-air ratio of the upstream exhaust gases to maintain the first device (70) of exhaust gases emission reduction at or below the threshold temperature, and when the fuel-air ratio of the upstream exhaust gases is below the threshold value, the air in injected into the exhaust passage (35) between the first device (70) of exhaust gases emission reduction and the second device (72) of exhaust gases emission reduction to maintain the downstream exhaust gases on a different, higher fuel-air ratio. The engine system and method for the engine are disclosed.EFFECT: providing the possibility of converting exhaust gases in a downstream device of exhaust gases emission reduction without exposing the upstream device of exhaust gases emission reduction to high temperatures.20 cl, 9 dwg

Exhaust gas cleaning device for internal combustion engines // 2631853
FIELD: engine devices and pumps.SUBSTANCE: device includes an additive supply valve (230) that injects an aqueous urea solution onto a diffusion plate (60) located in the exhaust passage (26). The valve (260) is connected to the urea aqueous solution supply pipe (240). The device also comprises a catalyst (41) and a controller (80). The catalyst (41) removes NOx from the exhaust gas using ammonia as the reducing agent, and the controller (80) is configured to set the injection timing of the aqueous urea solution according to a predetermined cycle. The controller (80) further includes units of calculating temperature, memory, producing the first injection pressure, calculating the second injection pressure, and calculating the third injection pressure. The temperature unit is configured to calculate the temperature of the plate (60), the memory unit is configured to store information on the urea solution injection pressure, the pressure producing unit is configured to obtain the first injection pressure during the previous injection of the urea solution from the memory unit. The second injection pressure corresponds to the injection pressure obtained when the urea solution is injected at the first time corresponding to the injection cycle elapsed after the previous injection. The third injection pressure is the injection pressure at the second time moment. The controller (80) is also configured to increase the pressure drop when the temperature of the diffusion plate is less than a predetermined temperature threshold. The first pressure drop, which is the absolute value of the difference between the first injection pressure and the second injection pressure, is less than the differential pressure drop threshold. And urea injection at the second time moment will cause the second pressure drop that is the absolute value of the difference between the third injection pressure and the first injection pressure, and which is larger than the first pressure drop. During the differential pressure increase process, the controller (80) sets, as the urea injection point, the second time point at which the second pressure drop exceeds the first pressure drop.EFFECT: increase in the pressure drop of the urea injection in order to prevent the continuous pressure of the urea jet at the same point of the plate.13 cl, 13 dwg

ixing device for further processing of waste gases // 2631591
FIELD: engines and pumps.SUBSTANCE: mixing device (1) comprises a housing (4) having an inlet section (3) and located inside the housing (4), extending substantially parallel to the main injection direction (5) of the dosing device (6) and intended for supplying liquid and/or mixtures of liquid - gas in the inner tube (7), provided in the inner space (8) of the inner tube (7) with a premix (10) area. The body (4) has a spiral-shaped portion (13) of the body and a dosing device (6), arranged on the end face (11) of the body (4). The main waste gas flow (12) is directed between the body (4) and the outer side surface (14) of the inner tube (7) and is supplied to the main mixing area (16), and the partial waste gas stream (17) is fed to the pre-mixing area (10), located near the dosing device. A partial waste gas stream (17) through the pre-mixing area (10) enters the main mixing area (16) and the main waste gas stream (12) contains a large portion of the waste gas volume, than the partial waste gas stream (17).EFFECT: increase the efficiency and reliability of waste gas cleaning with simultaneous disposal of its heat and captured components.14 cl, 6 dwg
Noise suppressor for axial fan by kochetov // 2630809
FIELD: machine engineering.SUBSTANCE: noise suppressor includes a body coaxial to the inlet and outlet branch pipes and a resonance insert mounted coaxially to the body, the body and the resonant insert are coaxially arranged and have equidistant polygonal profile in the cross-section with the resonant insert along the edges provided with a diffuser and a confuser with rigidly fixed perforated discs, a rib in the form of solid partition separating the resonant insert into two chambers is installed in the middle of the resonance insert, and the resonant insert is fixed in the body by means of fastening elements made in the form of at least one partition with holes, at that the body is inside, and the resonant insert is lined outside with sound-absorbing element. The sound-absorbing element is made in the form of the ring enclosing the resonance insert.EFFECT: improved efficiency of noise suppression.3 dwg
Noise suppressor of pneumatic valves outlet // 2630808
FIELD: machine engineering.SUBSTANCE: muffler comprises an inlet branch pipe and an outlet branch pipe formed by at least two transversal partitions located perpendicular to opening axis of the inlet branch pipe, one of which is rigidly fixed to the inlet pipe and the other is made blind and installed with respect to the first one with formation of an end gap, the partitions are fixed along their peripheral part by at least three screws with calibrated washers, a solid screen is rigidly attached to the last partition, in the form of a cup, fastening is performed by means of a bottom coaxial with the partitions, and the side surfaces of the screen form an annular gap with the peripheral part of the partitions. The screen is made of a porous sound absorber. The side surface of the cup is made acoustically lined in the form of rigid and perforated walls, between which there are two layers: a sound-reflecting layer adjacent to the rigid wall, and a sound-absorbing layer adjacent to the perforated wall, at that the layer of the sound-reflecting material is made of composite profile consisting of uniformly distributed hollow tetrahedrons which allow to reflect sound waves incident in all directions. Mineral wool on basalt base is used as a sound-absorbing material.EFFECT: improved efficiency of noise suppression.2 dwg
Noise silencer of ejector-type by kochetov // 2630807
FIELD: machine engineering.SUBSTANCE: silencer has a body, a nozzle and an intake chamber, the nozzle is made conical with a cut of diameter D and is rigidly connected by means of acoustically transparent rigid element to the housing with formation of gap Z, wherein the housing is lined inside with sound-absorbing material coated with acoustically transparent film, wherein the housing is made of structural materials with a layer of soft vibration damping material applied on its surface on one or both sides. A sound-absorbing element of annular type is used as sound-absorbing material and made in the form of rigid and perforated walls, between which two layers are arranged: a sound-reflecting layer adjacent to the rigid wall, and a sound-absorbing layer adjacent to the perforated wall, wherein the layer of the sound-reflecting material is made of a complex profile consisting of uniformly distributed hollow tetrahedrons which allow to reflect sound waves incident in all directions.EFFECT: improved efficiency of noise suppression.3 dwg
 
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