Internal combustion engine control system

FIELD: engine devices and pumps.

SUBSTANCE: control system of the internal combustion engine performs the control of the normal operation mode including lean control for setting air-fuel ratio of exhaust gas coming into an exhaust gas purification catalyst, on lean air-fuel ratio, and rich control for setting air-fuel ratio of exhaust gas coming into the exhaust gas purification catalyst to the rich air-fuel ratio. The control of the normal operation mode includes control of the reference estimated decrease which reduces the estimated reference amount of accumulation in the lean control when during the period of execution of the lean control, the air-fuel ratio of the exhaust gas flowing from the exhaust gas purification catalyst becomes lean estimated air-fuel ratio or more. The control system estimates that the exhaust gas purification catalyst is defective when the estimated reference amount of accumulation becomes smaller than the estimated wear value.

EFFECT: creation of the internal combustion engine control system provided with the exhaust gas purification catalyst having an oxygen accumulation capacity that suppresses NOX release.

4 cl, 17 dwg

 



 

Same patents:

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

FIELD: engines and pumps.

SUBSTANCE: invention relates to injection control in engines with fuel spontaneous combustion. The invention essence consists in that the fuel injection pressure is regulated, and also the starting moment of its injection in response to the fuel-air mix combustion feedback. And the injection pressure is increased if the starting moment of injection is late.

EFFECT: decrease of toxicity of the exhaust gases at combustion of fuels with different cetane numbers.

10 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: engines and pumps.

SUBSTANCE: invention relates to ICE combustion feedback systems. ICE (10) comprises multicylinder engine (12), load (14) engaged with engine via crankshaft (16), torque magnetic torque (24) arranged between engine (12) and load (14) and control module (26). Said torque magnetic transducer (24) can measure engine (12) torque to generate its output signal (28). Control module (26) is connected with torque magnetic transducer (24) to interact therewith. Control module (26) comprises data collection module (30) to receive torque signal (28) and to generate one or more control signals (32, 34, 36, 38) corresponding to one or more combustion parameters on the basis of torque signal (28). Data collection module (30) incorporates HF filter to generate detonation output signal configured to receive torque signal and to generate detonation output signal corresponding to engine one cylinder. Control module (26) can control one or more engine (12) control parameters on the basis of one or more combustion parameters for control over combustion in every engine (12) cylinder. Invention discloses the system design version.

EFFECT: higher accuracy of control.

16 cl, 6 dwg

FIELD: engines and pumps.

SUBSTANCE: proposed method consists in defining the initial moment of combustion in every cylinder 3, comparing it with preset magnitude and varying the moment of fuel injection into cylinders 3 in case defined moment differs from preset magnitude. Note here that exhaust gas temperature of every cylinder is measured to vary duration of fuel injection into cylinders 3 on the basis of exhaust gas temperatures to equalise power produced by said cylinders. Invention covers also the system for diesel engine cylinders balancing.

EFFECT: equalised power produced by different cylinders.

22 cl, 1 dwg

FIELD: engines and pumps.

SUBSTANCE: diesel engine (2) includes piston (3) that is moved in cylinder (4) along sliding surface (5) between lower dead point (UT) and upper dead point (OT). Fuel is supplied to cylinder (4) of diesel engine (2) with a spraying nozzle. At the inlet zone of cylinder (4) there provided are blow-down slots (6) for supply of scavenging air (7). There is outlet valve (8) at cover plate (9) of a head of cylinder (4). When in working state, fresh air (11) is taken by turbosupercharger (12) and supplied through blow-down slots (6) to cylinder (4) as scavenging air (7). At least one first oxygen sensor (131) and one second oxygen sensor (132) are provided at sliding surface (5) of cylinder (4) to evaluate blow-down characteristics in cylinder (4). Method for optimisation of a process blow-down mode of a two-stroke diesel engine is described.

EFFECT: preventing damages to an engine.

15 cl, 3 dwg

FIELD: engines and pumps.

SUBSTANCE: invention refers to a diagnostics method of the state of a fuel feed system of internal combustion engine (1) with controlled ignition and with fuel spray, which contains electronic control device (6) using oxygen sensor (8) for control in a closed loop of the value of air/fuel ratio in the mixture supplied to combustion chambers of the above engine, according to which a signal supplied with the above oxygen sensor is analysed; at that, a) change of time of effective spray is derived from the above signal and saturation of exhaust gas at the engine outlet is controlled; b) CRITERE = ∫ (CRITERE1+CRITERE2+CRITERE3) is calculated; c) CRITERE is compared to the pre-determined threshold values, minimum SEUIL_MIN and maximum SEUIL_MAX; d) malfunction state is stated when CRITERE is beyond the interval concluded between SEUIL_MIN and SEUIL_MAX.

EFFECT: improving operating efficiency of the internal combustion engine; reducing the quantity of pollutants at the outlet header outlet of the transport vehicle.

7 cl, 11 dwg

FIELD: engines and pumps.

SUBSTANCE: proposed method allows limiting power plant first output variable Msoll. Preset magnitude is set for second variable, preferably, rpm or speed. Actual magnitude of said second variable is defined. Preset magnitude is compared to actual magnitude. In case actual magnitude does not exceed preset one, first variable Msoll is limited by first magnitude Mzul. In case actual magnitude exceeds preset one, output variable Msoll is limited by second magnitude smaller than first Mzul. Invention covers also power plant control device.

EFFECT: ruled out emergent engine shutdown on exceeding preset rpm or speed.

10 cl, 4 dwg

FIELD: engines and pumps.

SUBSTANCE: in control device for internal combustion engine the module (10) of output of requirements outputs various requirements of internal combustion engine characteristics, which is expressed in terms of torque moment, efficiency or composition of air-fuel mixture; adjustment module (22) of torque moment gathers from many values of requirements, which are output from module (10) of requirement output, only the requirement values expressed in terms of torque moment, and adjusts values of requirement in torque moment to one; module (24) of adjustment of efficiency gathers the values of requirements, which are expressed in efficiency terms, and adjusts values of the requirement in efficiency to one; module (26) of adjustment of air-fuel mixture gathers values of requirements, which are expressed in terms of composition of air-fuel mixture, and adjusts the values of requirement included in air-fuel mixture to one; calculation module (30) of control variables calculates control variables of actuators (42), (44) and (46) on the basis of value of the requirement in torque moment, value of requirement in efficiency and value of requirement included in air-fuel mixture, which are output from adjustment modules (22), (24) and (26) accordingly.

EFFECT: providing accuracy of introduction of requirements connected to various characteristics of internal combustion engine to operation of actuators, and proper achievement of those requirements.

9 cl, 10 dwg

FIELD: engines and pumps.

SUBSTANCE: proposed method uses the value of at least one operating parametre selected to allow required braking moment. This method comprises determining required braking moment developed by the brake-decelerator and difference between required and developed braking moments. If said difference exceeds first tolerable value, brake-decelerator is controlled using the value of at least one second operating parametres. Second operating parametre is selected or adapted, or tuned to produce corrected developed braking torque. Developed braking moment is determined by actual or virtual braking moment transducer 3. First or second operating parametres are stored in memory in tabulated form. Operating parametres may be selected to the group of parametres including ICE exhaust system back pressure, supercharging pressure, pressure ahead or behind the turbine, turbine rpm or its variable geometry and position of vanes. In case difference between required and developed braking moment exceeds second tolerable value that exceeds first preset value, signal on fault is generated. Method of controlling is implemented by ICE brake-decelerator control system. Said control system comprises ICE control unit 12. Torque transducer 3 is mounted on ICE power transfer shaft 1a, 9, 10. ICE control unit 12 controls ICE operation and allows the control over brake-decelerator operation in compliance with selected control method. Said control unit 12 makes a part of transport facility control unit 14.

EFFECT: higher accuracy and reliability, optimum control.

11 cl, 2 dwg

FIELD: mechanical engineering; internal combustion engines.

SUBSTANCE: according to proposed method to control operation of internal combustion engine 1, mainly that used to power a vehicle, fuel is injected into combustion chamber 4 at operation of enriched fuel mixture and lean fuel mixture, and changing over between said operating conditions is provided, carrying out changing over from operation of enriched fuel mixture to operation on lean fuel mixture and vice versa. Moreover, accumulation of nitrogen oxides in catalytic converter 12 is done. Then quality function G is determined presenting efficiency of accumulation of nitrogen oxides in catalytic converter 12 depending on time interval DT at a laps of which operation on enriched fuel mixture is interrupted by catalytic converter 12. Quality function G is determined by several successive time intervals DT and, depending on said quality function G, action is made on process of changing over between above-indicated modes of operation.

EFFECT: provision of correct constant control over process of accumulation and release of nitrogen oxides and/or regulation of said process.

6 cl, 3 dwg

FIELD: engine engineering.

SUBSTANCE: method comprises supplying fuel to the combustion chamber and burning out fuel in the combustion chamber. The fuel is directly injected into the combustion chambers with the use of valve nozzles during suction or compression stroke depending on the regime of engine operation. The torques generated by cylinders are matched. The device for realization of the method is proposed.

EFFECT: enhanced reliability.

18 cl, 3 dwg

FIELD: mechanical engineering.

SUBSTANCE: invention relates to methods of control of multicylinder internal combustion engines. Invention provides possibility of improvement of method of matching of torques developed by pistons in separate cylinders at small and at considerable duration of injection and at operation of engine both under first and second conditions. Proposed method of control of operation of multicylinder internal combustion engine, mainly, internal combustion engines with direct injection of fuel, comes to injection of fuel into combustion chamber of said engine through valve nozzle at compression stroke under first operating conditions and at intake stroke under second operating conditions. Change-over between said operating conditions is provided and torques developed by pistons in separate cylinders of internal combustion engine are relatively matched. Matching of torques developed by pistons in separate cylinders is provided under first operating conditions by means of governor. Values of correction factors (r_ik) required for correction of mismatching of torques (M_f_ik) developed by pistons in separate cylinders (i) are determined in several operating points (k) and preserved, and basing on these injection parameters correction factors (r_ik), values of static mismatch (q_stat) and dynamic mismatch (q_dyn) of fuel flow rate through valve nozzle are found. Basing on obtained mismatch values (q_stat, q_dyn) of fuel flow rate through valve nozzle, amount of fuel injected into combustion chamber is corrected. Control unit for internal combustion engine, first of all, for internal combustion engine with direct injection of fuel, has combustion chamber into which fuel can be injected through valve nozzle, and regulator providing at least under first operating conditions, matching of torque developed by pistons in separate cylinders. Control unit provides change-over of indicated operating conditions.

EFFECT: improved matching of torque developed by pistons in separate cylinders.

10 cl, 3 dwg

FIELD: mechanical engineering; engines.

SUBSTANCE: according to proposed method of control of vehicle engine unit depending on preset value of an output parameter of unit, at least one adjustable parameter of engine unit is regulated. Together with preset value, setting time is set during which output parameter should settle at this value. Setting time is preset irrespective of control section used for regulation of at least one adjustable parameter. Vehicle engine unit control device has control unit which regulates at least one adjustable parameter of engine unit depending of preset value of an output parameter of engine unit. Means for regulating adjustable parameter are provided to input of which preset value of output parameter and setting time are supplied as preset values during which output parameter should settle at this value. Setting time of engine unit is preset irrespective of control section used for regulation of at least one adjustable parameter.

EFFECT: provision of matching of different requests for changing any operating parameter of engine unit irrespective of control sections of engine.

11 cl, 10 dwg

FIELD: mechanical engineering; engines.

SUBSTANCE: according to proposed method of vehicle power unit control depending on preset or desired values at least one output parameter of power unit is regulated using for this purpose one of preset or desired values chosen from number of all preset or desired values supplied for processing. In addition to preset of desired values, quality parameters or parameters characterizing some properties defining character of setting for preset or desired values, and to control power unit at least one such quality parameter or parameter characterizing some property is chosen independent of preset or desired values. Vehicle power unit control device has control unit with at least one computing element or processor into which preset of desired values to control power unit are fed and which is furnished with means to choose one such preset or desired value from number of all preset or desired values delivered to control device and use the value to control power unit. Quality parameters or parameters characterizing some properties defining character of setting to such preset or desired values are supplied to computing element or processor apart from preset or desired values, computing element or processor selects at least one such quality parameter or parameter characterizing definite properties apart from preset or desired values. Invention provides measured which, apart from coordination of preset or desired values, make it possible to coordinate quality parameters or parameters characterizing some properties and/or taking then into account at conversion into control actions to control power unit.

EFFECT: improved reliability of control.

7 cl, 4 dwg

FIELD: mechanical engineering; internal combustion engines.

SUBSTANCE: invention relates to fuel mixture preparation systems of internal combustion engines. Method to control fuel mixture composition in internal combustion engines includes increase of concentration of oxygen in gas mixture to optimum ratio with fuel by enriching atmospheric air getting into air clearance of internal combustion engine with oxygen. When changing over from idle running to maximum speed running, amount of fuel delivered into engine increased at change of amount of oxygen fed into gas mixture. Engines speed at reaching maximum value is limited by decreasing delivery of fuel by signal from engine speed sensor supplied into fuel amount control system. Control signal is formed to change amount of oxygen delivered into air cleaner. Device to control composition of fuel mixture in internal combustion engine with increase of concentration of oxygen in gas mixture contains fuel amount control system, engine speed sensor connected to fuel amount control system, air cleaner, oxygen bottom with valve and its control system. Valve is connected to air cleaner by pipe. Valve control system is connected with fuel feed sensor and is made for changing amount of oxygen delivered into air cleaner. Fuel amount control system is made for limiting delivery of fuel at maximum speed of internal combustion engine.

EFFECT: increased amount of oxygen with possibility of changing the amount depending on delivery of fuel and maximum tolerable speed of engine shaft and decreased consumption of fuel under other equal conditions.

3 cl, 1 dwg

FIELD: power engineering, electronics.

SUBSTANCE: proposed method and device exploit modulation algorithm. Proposed device incorporates preliminary control signal computation device to rise power plant output signal to designed value, device to divide aforesaid preliminary signal into multiple components, modulator to modulate at least one of aforesaid components and adder to sum modulated component with other components to generate input control signal. This allows minimising input signal pulsations caused by modulation, compensating nonlinearity of power plant characteristics, e.g. friction and hysteresis brought about by traditional modulation algorithm, and eliminating input signal variations.

EFFECT: compensation of nonlinear characteristic of power plant, higher stability of power plant with high pulsation of control variables.

12 cl, 10 dwg

FIELD: engines and pumps.

SUBSTANCE: invention relates to engine production, particularly to fuel feed adjustment and control in locomotive diesel engine. Proposed method pertains to fuel feed in large-size medium-rpm multi-cylinder diesel engine with fuel injection that incorporates turbo compressor and is used to drive railway locomotive. It allows engine rpm and fuel combustion efficient control and reducing engine harmful exhaust. In compliance with this method, fuel feed control is used to control engine rpm via first control feedback loop and generate engine fuel demand function proceeding from engine operating performances, and to forecast expected engine functions to optimise fuel feed via second, forecasting control loop. Proposed system controls fuel feed in large-size medium-rpm multi-cylinder diesel engine with fuel injection, that incorporates turbo compressor, and is used to drive railway locomotive. It comprises first control loop that adjusts engine rpm proceeding from preset engine rpm and representing a feedback control loop and second control loop that generates engine fuel demand function proceeding from engine operating performances, and to forecast expected engine functions to optimise fuel feed via second, forecasting control loop. Method to control fuel feed to diesel engine controls fuel feed in large-size medium-rpm multi-cylinder diesel engine with fuel injection that incorporates turbo compressor and is used to drive railway locomotive. It allows engine rpm and fuel combustion efficient control and reducing engine harmful exhaust. In compliance with this method, fuel feed control is used to control engine rpm via first control feedback loop and generate engine fuel demand function proceeding from engine operating performances, and to forecast expected engine functions to optimise fuel feed via second, forecasting control loop. Said second, forecasting, control loop exploits Taylor series to generate engine fuel demand correction signal, compute Taylor series proceeding from engine operating performances and converts said series into function of operating conditions range, thus allowing the system to adapt to engine it is incorporated with.

EFFECT: optimised fuel feed, efficient fuel combustion, higher power output and efficiency with reduced harmful effects on environments.

36 cl, 4 dwg

FIELD: engines and pumps.

SUBSTANCE: invention relates to engine production, particularly to adaptive control of ICE. Proposed system comprises fuel-air mix regulator, designed to regulate at least one of air or fuel portions fed to engine, transducer to measure engine output and controller connected with aforesaid pickup and regulator to feed signal to aforesaid regulator to regulate at least one of air or fuel portions fed to engine in designed operating range, depending upon multiple engine control settings for engine and fuel parametre control in said range. Said fuel parametre indicates fuel composition. Fuel parametre regulation is effected in the function of engine measured and expected outputs. Proposed method comprises regulating fuel-air mix fed to engine in various operating conditions depending upon multiple engine control settings for engine and fuel parametre control in said range, said fuel parametre defining fuel composition. It comprises also receiving signals describing engine output and adjusting fuel parametres in the function of engine measured and expected outputs. Proposed system represents instruction computer-readable medium designed to perform one or more automated operations, i.e. determining regulator control signal in engine operating range with respect to multiple engine control settings and controlling fuel parametre in aforesaid operating range. Regulator control signal serves to signal the regulator on adjustment of fuel-air mix fed to engine, while fuel parametre defines fuel composition fed to engine. Said system also receives signal defining engine output and fuel parametre in the function of engine measured and expected outputs.

EFFECT: improved fuel compensation.

35 cl, 7 dwg

FIELD: engines and pumps.

SUBSTANCE: internal combustion engine air-to-fuel ratio control device intended for smoothing variation in air-to-fuel ratio in multiple ICE cylinders comprises transducer to measure ICE output signal, device to calculate correlation function for every cylinder allowing for mutual correlation of magnitudes measured by aforesaid transducer and reference signal for every cylinder, device to calculate smoothing target value common for all cylinders and cylinders controllers to generate input control signal for appropriate cylinders providing for convergence to smoothing target value. Method of smoothing variation in air-to-fuel ratio comprises the following stages: measuring ICE output signal, calculating the function of correlation for every cylinder allowing for mutual correlation of magnitudes measured by aforesaid transducer and reference signal for every cylinder, calculating smoothing target value common for all cylinders and generating input control signal for appropriate cylinders providing for convergence to smoothing target value.

EFFECT: higher engine efficiency.

20 cl, 11 dwg

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