Engine operation method (versions) and engine control system

FIELD: engine devices and pumps.

SUBSTANCE: operating method is for engine (10) comprising a central throttle (62), a plurality of throttles (83), an air flow sensor (122) and a controller (12) functionally connected therewith. The flow of air delivered to the engine (10) is measured by the air flow sensor (122). It is determined whether the difference of the flow distribution between a plurality of throttles (83) of an opening is larger than the threshold difference of the flow distribution. If the measured air flow of the engine is less than the threshold air flow through the controller (12), the opening value of at least one of the plurality of throttles (83) of the opening is increased when the opening value of the central throttle (62) is reduced in response to the determination. The method of the engine operation and the engine control system are disclosed.

EFFECT: reduced filling time of the engine intake manifold.

19 cl, 4 dwg

 



 

Same patents:

FIELD: transport.

SUBSTANCE: invention relates to automotive industry and can be used in automotive engine driven compressor system. Compressor system (10) of vehicle (12) comprises compressor (16) driven by vehicle (12) engine (14). Said system comprises intake air guide (18) to force air pre-compressed by drive engine (14) turbosupercharger (20) to compressor (16). Said intake air guide (18) incorporates means (22) to flow section to construct supercharge pressure of pre-compressed air fed to compressor (16). Supercharge pressure maximum magnitude is set at idling subject to at least one of the following terms, i.e. compressor (16) oil outburst or compressor (16) power loss. Besides, invention covers the method of compressor system operation.

EFFECT: decreased power loss at idling.

15 cl, 9 dwg

FIELD: engines and pumps.

SUBSTANCE: in an inlet pipeline, at a small distance to an inlet valve of a cylinder there is a blowdown valve installed driven from a common cam shaft. In the end of an inlet stroke, 40-50° to the top dead centre (TDC), the inlet valve is opened. Spent gases go through the open inlet valve and reach the closed blowdown valve. Near the TDC, with remaining 10°, the blowdown valve is opened, and the combustion chamber is blown with air from an inlet header, afterwards the cylinder filling starts. Such solution makes it possible to substantially expand the angle of valves closure, this increasing the filling phase.

EFFECT: higher specific capacity of the engine with preservation of low toxicity of spent gases.

4 cl, 5 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 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: internal combustion engine.

SUBSTANCE: invention considers spark ignition internal combustion engines. The internal combustion engine contains the variable compression mechanism (A) which allows changing the degree of mechanical compression, and the mechanism (B) of valve timing adjustment, which allows changing the induction valve timing (7). The volume of induced air supplied to the combustion chamber (5), is controlled by means of changing the induction valve timing (7). Degree of mechanical compression increases to the maximum degree of mechanical compression when the volume of induced air supplied to the combustion chamber decreases. In this case the volume of induced air supplied to the combustion chamber (5) decreases when the induction valve timing (7) is moved from the dead point of induction to the limit valve timing. When the induction valve timing (7) reaches the limit valve timing, the volume of induced air into the combustion chamber (5) becomes the limit controlled amount of induced air controlled by the valve timing adjustment mechanism. When the volume of induced air into the combustion chamber (5), decreases additionally due to the limit controlled volume of induced air, induction valve timing (7) is kept at the limit valve timing. During acceleration, when the volume of induced air into the combustion chamber (5) is less than limit controlled volume of induced air, if required acceleration degree is higher than predefined degree, movement of the induction valve timing (7) starts from the limit valve timing in the direction approaching to the lower dead point of induction when the volume of induced air to the combustion chamber is less in comparison with that when required acceleration degree is lower than predefined degree.

EFFECT: acceleration increase.

4 cl, 15 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: internal combustion engine (ICE) with spark ignition includes variable compression degree mechanism and mechanism for adjustment of gas distribution phases. Variable compression degree mechanism has the possibility of changing mechanical compression degree. Gas distribution phase control mechanism has the possibility of controlling the inlet valve closing moment. Mechanical compression degree in working range of low load, excluding idle operation, is more than during the operation at high load. Mechanical compression degree during idle operation becomes lower than for working range of low load. When engine operation is switched over to idle mode, mechanical compression degree can be decreased gradually.

EFFECT: reducing vibration and noise caused by the engine during idle operation.

9 cl, 13 dwg

FIELD: engines and pumps.

SUBSTANCE: internal combustion engine (ICE) with spark ignition includes compression degree control mechanism, gas distribution phase control mechanism and throttle valve. When load on ICE becomes lower, the closing moment of inlet valve is shifted aside from lower dead point of suction stroke, and mechanical compression degree increases to maximum. At engine operation in range of loads that are lower than engine load at which mechanical compression degree becomes maximum, mechanical compression degree is maintained as maximum load, and actual compression degree decreases. On engine operation side with high load the mechanical compression degree decreases gradually when the load increases. When engine load becomes lower, inlet valve is shifted from lower dead point of inlet stroke. When engine load decreases on engine operation side with low load, actual compression degree decreases; at that, throttle gate closes.

EFFECT: providing favourable conditions for fuel ignition and combustion and improving thermal effectiveness.

5 cl, 11 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. Regulated gas distribution phase mechanism has the possibility of regulating the setting of inlet valve closing moment. Variable compression degree mechanism has the possibility of changing mechanical compression degree. At negative pressure in ICE inlet valve, which is lower than the required negative pressure, throttle valve opening degree is set to lower value. At lower throttle valve opening degree in the inlet valve there shall be set the required negative pressure or bigger negative pressure. At setting of the required or bigger negative pressure in inlet valve the setting of closing moment of inlet valve shifts in the direction close to lower inlet dead-point. Volume of intake air, which corresponds to the engine load, is supplied to combustion chamber in compliance with throttle valve opening degree. At that, mechanical compression degree is set to lower value in order to reduce the pressure at the end of compression.

EFFECT: providing the possibility of creating big negative pressure in inlet engine channel during ICE operation at low loads.

10 cl, 13 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: this invention allows control over nitrogen oxides emission. System to this end proceeds from computation of error set by the difference between first measured value received from nitrogen oxide pickup (7) and second value obtained from evaluation of nitrogen oxides. Said pickup (7) can be used in adaptation circuit wherein exhaust gas recycling control system runs with or without feedback. Said system is tuned to make expected nitrogen oxide emissions from exhaust gas recycling controller comply with those measured by said pickups at stationary operating conditions.

EFFECT: higher rate and accuracy of adaptation of nitrogen oxides emissions.

5 cl, 3 dwg

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