Device for exhaust gases control

FIELD: machine engineering.

SUBSTANCE: device for ICE exhaust gases control comprises an urea addition valve (40) configured to add an aqueous urea solution to the exhaust gases discharged from the combustion chamber (17) into the exhaust passage (19). Units (41, 42) for selective catalytic neutralisation of reduction type are configured to reduce nitric oxide in the exhaust gases by selective catalytic neutralisation, in which ammonia produced from an aqueous urea solution is used as a reducing agent. An ammonia slip catalytic converter unit (43) contains an oxidation catalyst. In this case, the unit (43) is located downstream of the selective catalytic neutralisation units (41, 42) and is configured to oxidise the ammonia flowing out of the units (41, 42). The fuel additive unit is configured to add non-combustible fuel to the exhaust gas burned in the combustion chamber (17). The electronic control unit (56) is configured to control the fuel addition unit during the addition increase process when the volume of nitrogen oxide flowing out of the units (41, 42) is not restored in the required volume relative to the volume of nitrogen oxide entering the units (41, 42). Also, when the temperature of the catalyst bed in the unit (43) is in the temperature range where the nitrogen oxide in the exhaust gases can be reduced in the unit (43) by selective catalytic neutralisation, in which the hydrocarbon is used as a reducing agent so that the hydrocarbon volume in the exhaust gases, entering the unit (43), increases.

EFFECT: prevention of nitrogen oxide emissions into the atmosphere.

12 cl, 7 dwg

 



 

Same patents:

FIELD: engines and pumps.

SUBSTANCE: invention proposes a fuel system containing fuel pump 28, a fuel pressure amplifier and injection nozzle 1. In housing 2 of the pressure amplifier there located is spring-loaded piston-multiplier 3, opposite which disk 11 separating drain valve 12 located after it is installed. A cavity between disk 11 and piston-multiplier 3 is interconnected with fuel accumulator 18 is interconnected with the fuel accumulator through a discharge valve and contains spring-loaded plunger made in the form of a pipe located in head of cylinders 5. Fuel pump 28 is interconnected with the fuel accumulator through a discharge valve and contains spring-loaded plunger 29 having a drive from cam shaft 26 of the engine. Plunger 29 is located in a sleeve installed in a cartridge enveloping a return spring of the plunger, which is arranged about the sleeve.

EFFECT: reduction of pressure losses of fuel supplied to the injection nozzle to increase spray pressure of fuel to engine cylinders to improve a process of mixture formation, and therefore, fuel combustion.

2 cl, 2 dwg

FIELD: engines and pumps.

SUBSTANCE: this device comprises fuel pressure booster, body (1) provided with tubular section (2) fitted in the engine cylinder head (3). Sleeve is fitted on body section (2) and provided with threaded joint with cylinder head (3) to abut on crescent-shaped inserts (5). The latter are fitted in circular groove made in the body section (2). Tapered end of section 1 is fitted in funnel made in the case of atomiser (6).

EFFECT: decreased fuel pressure drop, higher fuel injection pressure, better combustion.

2 cl, 2 dwg

FIELD: engines and pumps.

SUBSTANCE: device to feed fuel to nozzle (1) comprises pressure booster with case (2) accommodating spring-loaded stepped piston-booster (3). Barrel-like case (2) houses disc (11) opposed to booster piston (3). Electromagnetically controlled drain valve (12) is arranged behind said disc. Said valve as-opened communicates chamber (14) with drain pipe via holes in disc (11) and in case (2). Booster piston houses return piston (15). Chamber between disc (11) and booster piston (3) communicates with fuel accumulator (18) arranged in cylinder head (5).

EFFECT: decreased fuel pressure losses, increased fuel injection pressure.

2 cl, 2 dwg

FIELD: engines and pumps.

SUBSTANCE: fuel pressure booster is offered in a housing 1 of which a step hole 12 is provisioned, where a boosting piston 13 with a return spring 14 is located. In the piston 13 a spring-loaded check valve 16 locking fuel passing from the nozzle 6 towards the cover 8 of the housing is located. In front of the locking element of the valve 16 its seat 17 is installed which has a threaded connection with the piston 13. The seat 17 has a through axial hole 18 located opposite to the valve locking element 16 and the throttle lateral opening 19 interconnecting the hole 18 through the hole 21 in the piston 13 with the cavity 22 in the housing 1 where the spring 14 is located. The cavity 22 is interconnected through the throttle hole 24 with the controlled drain valve 25.

EFFECT: decrease by simple means of losses of pressure of the fuel supplied to a nozzle and by that increase of pressure of injection of fuel into engine cylinders for improvement of mix forming process.

2 dwg

FIELD: engines and pumps.

SUBSTANCE: device for supply of fuel to the engine nozzle 1 is offered which contains a fuel pressure booster inserted into a cylinder head of an engine and having a housing 2 designed as a barrel with collar. In the housing 2 the spring-loaded step boosting piston 3 is located. The bushing 23 with a threaded connection with the cylinder head is put on the housing near the collar. Between the housing 2 and the nozzle the fixing ring 6 having a threaded connection with the cylinder head, the washer 7 with the conic hollow located from the nozzle side, the tubular rod 8 with the conic ends located in the hollow made in the washer 7, and in the funnel made in the nozzle housing, are installed.

EFFECT: decrease of losses of pressure of the fuel supplied into a nozzle, increase of pressure of fuel injection into the engine cylinders and improvement of mix forming process without complication of the nozzle design.

3 cl, 2 dwg

FIELD: transport.

SUBSTANCE: invention relates to transport and can be used in processes of fuel combustion in internal combustion engines (ICE). In the method, both charge stratification and homogeneous air-fuel mixing is provided by means of changing at least one injection parameter. The method consists in adjustment of fuel injection depth by means of changing injection pressure. Injection depth is adjusted within total depth of combustion chamber, and injection pressure is changed either smoothly or in steps, in particular using mode selector. Mode selector provides at least two fixed charge stratification modes with possibility of their selection or switching between them. Herewith, within used modes the injection duration parameter can be set in proportional dependence or in one of types of nonlinear dependence on injection pressure: differential, integral, logarithmic or any other nonlinear dependence.

EFFECT: wider range of fuel depletion degrees which improves efficiency and cleanliness of exhaust ICEs.

8 cl, 1 dwg

FIELD: engines and pumps.

SUBSTANCE: proposed fuel feed corrector comprises high-pressure fuel pump with fuel feed proportioner, temperature gage arranged at high-pressure fuel pump inlet and electrically connected with actuator articulated with fuel feed corrector. Besides, it is equipped with the bar its length being varied by screw-nut gearing with one end connected with high-pressure pump proportioner and opposite end connected with actuator built around stepping motor control by electric control unit in response to signals generated by temperature gage.

EFFECT: higher accuracy of correction.

1 dwg

FIELD: engines and pumps.

SUBSTANCE: internal combustion engine (ICE) includes cylinders, fuel spray injectors (11-18) and at least two common high pressure fuel lines (R1, R2). Cylinders are grouped at least in two rows (B1, B2). Injectors (11-18) of one row (B1, B2) of cylinders are connected to different common high pressure fuel lines (R1, R2). Also, ICE version with cylinders grouped at least in two rows (B1, B2) in which each atomiser is connected to one of common fuel lines (R1, R2) is described. Each common fuel line (R1, R2) has its own high pressure pump and common fuel lines (R1, R2) are hydraulically connected to each other. Besides, there described is operation control method of ICE with several cylinders, the common fuel lines (R1, R2) of which are hydraulically connected to each other, at which fuel pressure in one common fuel line (R2) is controlled, and pressure is controlled in advance in the other common fuel line (R1).

EFFECT: reduction of pressure fluctuations in common high pressure fuel lines.

10 cl, 6 dwg

FIELD: engine engineering.

SUBSTANCE: invention relates to engine engineering, particularly to high pressure fuel supply systems equipped with systems controlling fuel injection pressure in locomotive diesel cylinders. Automatic fuel injection pressure control system depending on diesel operation modes is provided with pneumatic filling up injectors connected to the common locomotive air main-line through the by-pass pipeline and standard electro-pneumatic valve coupled with switching contacts of locomotive driver controller. The system is provided with three by-pass pipelines connected to the pneumatic filling-up injectors and common locomotive air main-line. Pneumatic gear boxes and electric pneumatic valves are installed in each by-pass pipeline. They are coupled with a plus side of power supply terminal through the reverse and direct auxiliary contacts of a standard electromagnetic contactor switch. Two pairs of additional contacts are also available in the by-pass pipelines, which control electro-pneumatic valves operation. The above mentioned electro-magnetic valves are cinematically connected with two additional edge cams being rigidly installed on a driven rod of locomotive driver controller.

EFFECT: wide range of injection pressure control and fuel injection pressure changing in not only idle mode, but also at partial diesel loads.

2 dwg

FIELD: engines and pumps.

SUBSTANCE: invention relates to engine production, in particular, to ICE control systems. The proposed ICE control device comprises a set of fuel injection mechanisms including one first fuel injection mechanism to inject fuel into the cylinder and one second mechanism to inject fuel into inlet manifold. Note that every cylinder is furnished with the aforesaid set of mechanisms. The proposed device incorporates also a controller to exercise control over the said first and second fuel injectors and to distribute the injected amount in compliance with the ICE specs, and the ICE temperature detector. The said controller computes the change in the amount of fuel to be injected by the aforesaid first and second fuel injection mechanisms with the idling engine and corrects the aforesaid amount allowing for computed change. There are several versions of the device embodiment described by the formulae enclosed.

EFFECT: ICE control device accurately defining amounts of fuel to be injected for cold and warmed up engine states.

18 cl, 10 dwg

FIELD: engines and pumps.

SUBSTANCE: invention can be used in internal combustion engines. This method comprises step whereat injection control device is used to evaluate if preset terms of fuel changeover logics are satisfied in engine running on several fuels. This is done to change fuel to drive by said fuel 1 to drive by said fuel 2.It includes the step whereat said logics is used to force the amount of fuel to engine cylinder 1 in every cycle in compliance with programmed pattern. This allows the fuel amount to be increased for involved atomiser. Note here that fuel amount injected by atomiser not involved in changeover. Note also that fuel amount is forced in other cylinders with sequential reiteration of said pattern. It comprises the step whereat patter portion is executed wherein total amount of fuel fed to said cylinder 1 is injected by atomiser involved in changeover. Fuel changeover is terminated when said patter portion is sequentially executed one time in all other cylinders. Invention discloses also the injection control device.

EFFECT: higher efficiency of engine operation.

6 cl, 5 dwg

FIELD: engines and pumps.

SUBSTANCE: invention can be used in ICE control and fuel feed systems. Proposed are system and methods of ICE adjustment on the basis of monitored conditions inside engine combustion chamber (pressure or light emission). In some cases, this system monitors the areas inside combustion chamber to identify or define satisfactory condition to apply ionising voltage to fuel injector so that combustion is initiated during said satisfactory condition. In some cases, this system monitors the conditions in said combustion chamber to define is monitored conditions indicates the need in adjustment of combustion parameter to regulate ionisation level in said combustion chamber.

EFFECT: simplified control, expanded range of used fuels, lower fuel consumption and level of harmful emission.

20 cl, 2 tbl, 9 dwg

FIELD: transport.

SUBSTANCE: invention relates to method for vehicle performance improvement. Method to improve performance of vehicle (100; 110) which has engine (230) and exhaust system with catalyst (260). The method includes phase of determination (s440) weather preset operational state of vehicle (100; 110) has been achieved or not, which relates to situation where risk of deposits build-up in exhaust system is increasing. The method also includes phase of taking (s460), if operational state is achieved, at least one measure to counteract deposits build-up. The invention also relates to device improving performance of vehicle (100; 110) which has engine (230) exhaust system with catalyst (260) and to vehicle equipped with such device.

EFFECT: higher efficiency of vehicle operation/ as well as decreased amount of maintenance.

17 cl, 5 dwg

FIELD: automotive industry.

SUBSTANCE: in the method, the device, the medium, and the vehicle of correction of combustion parameter the value of the parameter Pi is set (104) by interpolation between two pre-determined values Piref1 and Piref2 depending on the CO value of the engine mode and on the temperature of the engine coolant, and the values Piref1 and Piref2 are optimal for reducing polluting emissions when the control fuel is fed to the engine respectively to high volatility and low volatility.

EFFECT: limitation of polluting emissions during the blowdown of the vehicle engine.

8 cl, 5 dwg

FIELD: engines and pumps.

SUBSTANCE: proposed system uses catalyst arranged in engine exhaust channel to cause reaction of NOX contained in offgas and reformed hydrocarbon. Besides, catalyst base on noble metals is applied on offgas cleaning catalyst surface in contact with offgas flow. Note here that basic offgas flow surface is formed around catalyst based on noble metals. Offgas cleaning catalyst can reduce NOX contained in exhaust gas in initiating vibrations of offgas hydrocarbon concentration in preset amplitude range and preset period range. Besides, offgas cleaning catalyst increases amount of NOx contained in exhaust gas on increasing period of vibrations of hydrocarbon concentration beyond preset range. Note here that in engine operation, conversation of hydrocarbons in offgas cleaning catalyst is forced to vary in said preset amplitude range and preset period range to reduce NOx in offgas cleaning catalyst.

EFFECT: higher rate of NOx cleaning.

24 cl, 36 dwg

FIELD: engines and pumps.

SUBSTANCE: control device of exit gas recirculation (EGR) for control of diesel engine includes EGR valve by means of which the engine EGR flow is controlled, suction air throttle valve by means of which the engine suction air flow is controlled, and the mechanism in which EGR valve opening is enabled in conjunction with the opening of air throttle valve. Each of the determining opening lines (characteristic curves) and with regard to opening of EGR valve and air throttle valve has dead zone section, where the flow rate remains unchanged, even when the valve opening increases above some opening limit. EGR control device is equipped with dead zone evaluation device that estimates excess air design factor λ considering the oxygen residue in EGR gas. The conclusion is made that at least one of EGR valves and air throttle valve is engaged in dead zone, on the basis of the rate of change of the estimated design factor λ of excess air when the rate of change of excess air design factor λ is less than the preset level. EGR control device is equipped with dead zone compensation device that makes the corrections concerning command signals of opening in relation to EGR valve and suction air throttle valve so that dead zones do not interfere with the mechanism concerning joint opening operation when evaluation device of dead zone makes a conclusion that at least one of EGR valves and air throttle valve is engaged in dead zone and the engine is in the condition of transient process.

EFFECT: simpler control of the valve opening.

7 cl, 12 dwg

FIELD: internal combustion engine.

SUBSTANCE: invention considers the operation and control of the internal combustion engine installed in vehicle. Control unit of internal combustion engine controls the rotating frequency of internal combustion engine idle run and contains the control block. Control is carried out by regulating rotation frequency of internal combustion engine according to the target rotation frequency of internal combustion engine. Target frequency is set according to working condition of the internal combustion engine and decreased when speed of a vehicle is equal or below the set value. If rotation frequency of internal combustion engine is equal or lower than threshold rotation frequency of internal combustion engine, which is lower than target frequency, rapid increase in rotation frequency of internal combustion engine is carried out. Rapid increase in rotation frequency of the internal combustion engine is made to prevent reduction of rotation frequency of the internal combustion engine. The control block defines vehicle movement on a road surface with low friction factor. During movement on a road surface with low friction factor, in case of switching the internal combustion engine to idle run, the control block reduces target rotation frequency of the internal combustion engine. Reduction of the threshold frequency is made to prevent the reduction of rotation frequency of the internal combustion engine. Also the invention describes the rotation frequency control method of the internal combustion engine in idle run.

EFFECT: ability to stop the vehicle within a short time.

10 cl, 22 dwg

FIELD: internal combustion engine.

SUBSTANCE: invention considers spark ignition internal combustion engines. The internal combustion engine includes variable compression mechanism, the mechanism of valve timing adjustment, and throttle gate and catalyst and temperature predicative tool of the catalyst. Catalyst is placed in the outlet port of the engine. When engine load becomes lower, the mechanical compression degree increases to the maximum mechanical compression value and induction valve timing is shifted from the lowest dead point of induction given that the catalyst is active. If it is predicted that in case of load lowering the catalyst temperature will fall below activation temperature, then reduction of mechanical compression degree, shift value of induction valve timing in a direction to lower dead point of induction and reduction in degree of throttle gate opening becomes larger to lower the degree of actual expansion simultaneously with supporting or increasing the actual compression degree.

EFFECT: ensuring catalyst temperature increase at the same time maintaining good conditions for combustion initiation.

3 cl, 25 dwg

FIELD: engines and pumps.

SUBSTANCE: proposed engine comprises variable compression ratio mechanism, variable phase distribution setter, and restrictor. With engine load decreasing, compression ratio increases to its maximum kept thereat in load zone lower than that of engine. Note here that intake valve closing setting displaces from BDC to maximum closing setting. With closing setting reaching maximum values, engine load is lower that load at which compression ratio reaches its maximum. Simultaneously, actual compression ratio downs gradually compared with engine high-load operation time. With intake valve closing setting reaches its maximum, amount of air intake is controlled by restrictor in the range of loads lower than that of engine whereat intake valve closing setting reaches its maximum. At loads lower the engine load when intake valves closing setting reaches its maximum, restrictor may be retained in completely open position.

EFFECT: permanent stable ignition.

3 cl, 12 dwg

FIELD: engines and pumps.

SUBSTANCE: internal combustion engine (ICE) with spark ignition includes regulated gas distribution phase mechanism, variable compression degree mechanism and throttle valve. Throttle valve is arranged in inlet ICE channel. When ICE load decreases from high to low, the closing moment of inlet valve is moved in the direction from lower dead inlet point. At low load operation of the engine the mechanical compression degree is kept maximum. At high load operation of the engine, the mechanical compression degree increases when the engine load becomes lower; at that, actual compression degree remains constant. Pre-determined load is set within the range of load where mechanical compression degree is kept maximum. Throttle valve is retained in fully opened state in the area between high and pre-determined (L2) loads. When engine load becomes lower, the opening degree of throttle valve becomes lower and opening moment of inlet valve moves in the direction from upper dead inlet point. In the load area, where mechanical compression degree is kept maximum, actual compression degree becomes lower when the engine load decreases.

EFFECT: improving combustion process allowing to obtain high thermal efficiency.

2 cl, 11 dwg

FIELD: engines and pumps.

SUBSTANCE: invention relates to operation of reducer feeder. Method of operation of feeder (1) of reducer from tank (2) to device (3) intended for cleaning of exhaust gas of engine (4) in car (5). Note here that in ICE (4) operation, intermittent withdrawal of air (22) from said feeder (1) occurs. In compliance with this invention, first, air removal process (22) is registered. Then, time relay (6) is activated with preset time interval (16) and/or preset mass flow adder (25) is activated. Preset time interval (16) and/or preset mass flow (26) are reached, air removal process (22) is activated.

EFFECT: precise dispensing of reducer.

10 cl, 4 dwg

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