Exhaust gases recirculation system diagnostic technique (versions) and exhaust gases recirculation system

FIELD: engines.

SUBSTANCE: invention can be used in internal combustion engines equipped with exhaust gas recirculation systems. Exhaust gases recirculation system (EGR system) diagnostic technique involves, that engine (10) is provided with possibility to operate during time exceeding threshold value of time, when EGR system bypass valve (84) is in first state. Notified on EGR system cooler (82) performance deterioration in response to issuing command to switch EGR system bypass valve (84) to second state based on difference of actual gas temperature in EGR system and expected gas temperature in EGR system before changing bypass valve (84) state. Disclosed is invention version of exhaust gases recirculation system diagnostic technique and exhaust gases recirculation system.

EFFECT: technical result consists in simplification of diagnostics process.

20 cl, 4 dwg

 



 

Same patents:

FIELD: engines and pumps.

SUBSTANCE: diesel injector spray nozzle for biofuel includes housing (1) and needle (2). Needle (2) is located in housing (1). Annular groove (3) is made on inner surface of housing (1). There is well (6) and fuel spray holes (5) in lower part of housing (1). Inner part of holes (5) is provided with fuel flow shapers. The latter contribute to carbon formation reduction. Each shaper can be made in the form of insert (7) with screw channels, which is then continued to conical chamber (8) and to nozzle holes (5). Insert (7) is made in the form of a screw with double-threaded winding and turns of rectangular section.

EFFECT: possibility of achieving finer biofuel spray is provided.

5 cl, 4 dwg

FIELD: engines and pumps.

SUBSTANCE: liquefied gas supply system includes tank (T) 2 with liquefied gas fuel, fuel pump 3 with supply pipeline (SP) 4 and injectors (I) hydraulically connected to it. Injectors are combined into two groups 5-8 and 9 and connected to electronic control unit 10. Each I group is provided with a drain pipeline connected to the tank. SP of each I group is provided with a controlled valve having a possibility of SP shutting-off. The system includes gaseous fuel temperature 16 and pressure 17 sensors and an ice formation control sensor. In each I group, at least one of the injectors is provided with a temperature sensor. The tank is provided with a heating element.

EFFECT: improving operating reliability of a liquefied gas supply system.

7 cl, 1 dwg

FIELD: engines and pumps.

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

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

11 cl, 4 dwg

FIELD: engines and pumps.

SUBSTANCE: diagnostics method of failures of an exhaust gas pressure control provided in an exhaust gas system connected to an internal combustion engine with supercharging includes the following stages. Engine braking specified and back pressure is measured in the exhaust gas system by means of a back pressure sensor when the engine braking is being specified. Supercharging pressures are measured by means of a supercharging pressure sensor when the engine braking is being specified and measured back pressure and measured supercharging pressure are compared with stored values of back pressure and supercharging pressure to determine a failure of the pressure control or the back pressure sensor. A diagnostics device of failures of the exhaust gas pressure control, which is provided in the exhaust gas system, as well as a transport vehicle using the proposed method or the proposed device is described.

EFFECT: improving diagnostics reliability and accuracy.

14 cl, 1 dwg

FIELD: engines and pumps.

SUBSTANCE: object of this invention is 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 (1), according to which a signal supplied with the above oxygen sensor (8) is analysed; at that, a) spray time correction factor ALPHACL_MOYEN is derived from the above signal, by means of which saturation of exhaust gas at engine (1) outlet is controlled, b) ALPHACL_MOYEN is compared to the pre-determined threshold values: minimum SEUIL_MIN and maximum SEUIL_MAX; c) malfunction state is stated when ALPHACL_MOYEN 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, 8 dwg

FIELD: transport.

SUBSTANCE: proposed method consists in that one and the same control program is executed with redundancy in several actuator units 2A, 2B in comparison mode (VM). Said program represents program of control over ICE developed torque. To identify failure, signals generated by said actuator units are compared in executing said control program. After its execution, system is changed over into higher efficiency mode (PM) whereat said units execute different programs. Note also that programs executed in higher efficiency mode (PM) control ICE.

EFFECT: higher accuracy and reliability.

8 cl, 5 dwg

FIELD: engines and pumps.

SUBSTANCE: method comprises stages: a) said electric signal called ''unprocessed signal'' (SBTE) is measured; b) said unprocessed signal is filtered to get ''filtered signal'' (SFTE); c) unprocessed signal-to-filtered signal ratio is computed in constant time interval, that is, absolute magnitude of difference between unprocessed signal and filtered signal; d) said absolute magnitude is compared with preset threshold of maximum deviation (SVM); e) if said absolute magnitude exceeds said threshold state of short shutdown presence is confirmed; f) otherwise, previous steps are repeated.

EFFECT: higher accuracy and reliability.

11 cl, 3 dwg

FIELD: engines and pumps.

SUBSTANCE: invention relates to automotive industry, particularly, to operation of automotive ICE. In said carb ICE, fuel, gasoline or ethanol (E85) is injected by at least one injector directly combustion chamber. Note here that said carb engine may be operated on has, particularly, on CNG (Compressed Natural Gas) and LPG (Liquefied Petroleum Gas). Note also that I operation on fuel for carb engines, index of fuel adaptation is continuously defined. Current index of adaptation in operation of fuel for carb ICE is entered into memory while on termination of preset period of running on gas, current index of adaptation of mix in operation on fuel for carb engine is compared with said entered index of mix adaptation. In case the difference between current and memorised indices of mix adaption exceeds preset value, fuel injectors are blown.

EFFECT: higher reliability due to observing carbonisation.

6 cl, 1 dwg

FIELD: electricity.

SUBSTANCE: electric starting system of automobile engine includes storage battery (1), start and ignition switch (2), thrust relay (3) including winding and closing contact, starter (4), starter interlocking circuit including power transistor (5), control transistor (6) and resistors (7) and (8), isolation diode (9) and sensor (10) of engine operation beginning. Emergency oil pressure sensor consisting of indicating lamp and closing contacts is used as sensor (10) of engine operation beginning.

EFFECT: simpler system and improved operating conditions of storage battery.

1 dwg

FIELD: physics; control.

SUBSTANCE: invention relates to functional module control systems. The method of operating a control system (V) which controls a set of first functional modules (f1-f4) and second functional modules (g1-g2) is disclosed. A blocking module (I) assigns first control states (s1-s4) a value of which characterises the corresponding functional modules as blocked if an event detector (E) detects corresponding events (e1-e4), after which the control system (V) no longer allows execution of corresponding first functional modules (f1-f4). The blocking module (I) assigns second control states (r1-r2) a value of which characterises the corresponding functional modules as executed if an event detector (E) detects corresponding events (e1-e4), after which the control system (V) allows execution of corresponding second functional modules (g1-f2).

EFFECT: invention improves quality of controlling functional modules.

10 cl, 5 dwg

Ice control device // 2350776

FIELD: engines and pumps.

SUBSTANCE: engine electronic control unit executes program allowing computation of following magnitudes, i.e. fuel injection ratios of the injector fitted in the cylinder (S100), ignition advance with the help of the first card used when the injector fitted inside the cylinder features the fuel injection ratio equals 1. Note here that the first card ensures ignition the (S220), ignition advance with the help of the second card used for the fuel injection ratio that equals zero. Note that the second card ensures ignition time with the minimum advance (S230) and ignition advance with the help of the third card used for fuel injection ratio exceeding zero but smaller than unity. Note that the third card ensures ignition time with higher ignition advance for larger value of ratio (S240).

EFFECT: control device for ICE comprising first and second fuel injection mechanisms participating together in injecting fuel into cylinder and intake manifold and allowing accurate computation of ignition time.

5 cl, 5 dwg

FIELD: mechanical engineering; internal combustion engines.

SUBSTANCE: according to proposed method of control of internal combustion engine, basing on first value characterizing amount of injected fuel and second value characterizing angular position in which metering out of fuel for injection is carried out, third value characterizing torque developed by internal combustion engine is found. Basing on fourth value characterizing control action set by driver, fifth value is found characterizing torque set by driver, and third and fifth values are subjected to processing and analyzing for revealing troubles. First value corresponds to duration of control action or signal to output stage, first of all, to electromagnetic valve or electromagnetic valve nozzle, or to piezoelectric drive. Second value corresponds to angular position of crankshaft at which injection takes place. Fourth value corresponds to position of member or element of control. Trouble is revealed if mismatching of third and fifth values exceeds preset threshold value. Trouble check should be carried out only under definite operating conditions. Control device of internal combustion engine makes it possible to implement the method.

EFFECT: possibility of reliable and accurate revealing of troubles in fuel metering system and/or recording of control action preset by driver.

3 cl, 3 dwg

FIELD: mechanical engineering; internal combustion engines.

SUBSTANCE: according to proposed method of detecting trouble basing on diagnosing provided by detonation combustion sensor duly related to cylinders of multiple cylinder internal combustion engine and output signal of which depends on level of recorded noise, troubles are detected with account of cylinder or cylinders creating noise of highest level or with due account of cylinder(s) noise from which is recorded by detonation combustion sensor as highest. Detonation combustion sensor is considered defective if some actual value depending on noise level exceeds at least one preset upper threshold value or comes out of the limits of at least one preset lower threshold value. In proposed trouble detecting device basing on diagnosing provided by detonation combustion sensor which is duly related to cylinders of multiple cylinder internal combustion engine and output signal of which depends on level of recorded noise, means are provided to determine maximum value which make it possible to transmit for subsequent processing only signals related to cylinder where noise level is highest or only the signals related to cylinder in which noise detected by detonation combustion sensor is highest.

EFFECT: reduced threshold value of engine shaft rotation frequency starting from which diagnosing of detonation combustion sensor can be done without affecting trouble detection process.

10 cl, 3 dwg

FIELD: technology and equipment for controlling sensor, preferably, sensor for measuring value, characterizing pressure of air fed into internal combustion engine.

SUBSTANCE: sensor error is detected on basis of absence of changes of its output value in response to appropriate change of certain work parameter, for example, amount of injected fuel. Sensor control can be performed, for example, only if some certain operation modes are present. In case of sensor breakdown, equivalent value is used for controlling engine. Such an equivalent value can be generated on basis of values, characterizing operation mode of internal combustion engine, for example, can be calculated on basis of rotation frequency and/or amount of injected fuel. Also as aforementioned equivalent value, value, received and saved previously, prior to sensor breakdown, can be utilized.

EFFECT: possible reliable correction of errors and breakdowns in operation of sensor, including those during operation of internal combustion engine in dynamic mode.

2 cl, 3 dwg

FIELD: mechanical engineering.

SUBSTANCE: invention relates to methods of detecting and correcting errors when checking operating parameters of internal combustion engine. Proposed method is effected by checking parameters for authenticity in processing device storing multi-or single-parameter characteristics. Deviation of from authenticity is considered as presence of error which is corrected at observation of preset conditions. According to proposed method, multi- or single-parameter characteristics is divided at least into two ranges, and errors are revealed in each range of multi- or single-parameter characteristic with correction of errors only in range where error has been preliminarily detected. Device for detecting and correcting of errors at checking of operating parameters of internal combustion engine is furnished with at least one computing device.

EFFECT: provision of possibility of reliability and effective detection of errors and reliable correction of errors.

6 cl, 3 dwg

FIELD: test equipment.

SUBSTANCE: signal processing device intends for identification of detonation knocks at operation of internal combustion engine. Signals, produced by detonation burning signals, are subject to digital processing. Operations for detecting malfunctions are performed. For the purpose two different functions of inspection are provided. When first one is in action, test pulse is sent to specific area of circuit. When second function is in action, supply of detectors' signals is stopped. In any case reaction of analog and digital parts of circuit is controlled due to comparison of signal at output of digital part with corresponding threshold value. Ability of inspection of serviceability of digital and analog parts of circuit is provided for the whole device and especially of signal processing integral circuit.

EFFECT: ability of detection of malfunctions at signal digital processing.

9 cl, 1 dwg

FIELD: mechanical engineering; diesel engine automatic control systems.

SUBSTANCE: proposed automatic control system of diesel engine running idle and in emergency situations has internal combustion engine with high-pressure fuel pump furnished with fuel feed control, crankshaft speed centrifugal governor and speed setter. System contains also speed setter position pickup, crankshaft speed pickup, electronic unit to control fuel supply at idling containing logic unit, first and second electronic switches, first and second comparators, speed upper and lower limit setters, stabilized supply unit, electric circuit idling switch and first electromagnetic actuator equipped with travel stop. System includes additionally unit to protect internal combustion engine from emergency oil pressure drop in lubricating system containing emergency pressure warning device and third electronic switch electrically connected with first electromagnetic actuator, and unit to protect internal combustion engine from emergency crankshaft speed rise containing shift recorder, setter and multivibrator of emergency speed level, fourth electronic switch and electromagnetic shutoff valve installed at fuel input in high pressure fuel pump, and switch of unit protecting internal combustion engine from emergency oil pressure drop in lubrication system.

EFFECT: enlarged functional capabilities of system and increased reliability.

FIELD: engines and pumps.

SUBSTANCE: device to control the internal combustion engine incorporating the fuel injection first mechanism to inject fuel into cylinder, the second fuel injection mechanism to inject fuel into the inlet manifold, the first fuel feed mechanism to feed fuel into the first fuel injection mechanism and the second fuel feed mechanism to feed fuel into the first and the second fuel injection mechanism. The control device incorporates a control unit to effect control over the first and second fuel injection mechanisms so that the both said mechanisms participate together in injection, the said control including the termination of injection by either the first or the second injection mechanism. The first fault detection unit is designed to pinpoint the fault in the first fuel injection mechanism, while the second fault detection mechanism is designed to pinpoint the fault in the said first fuel injection mechanism. The aforesaid control unit is designed so that to effect the control over fuel injection in the following way, i.e. fuel is injected by, at least, the first injection mechanism using the second fuel feed mechanism when the first fault detection unit pinpoints the fault in the first fuel feed mechanism, and the second fault detection mechanism does not reveal any faults in the first fuel injection mechanism. The device second, third and fourth versions are revealed in cl. 10, 19, 28 of the invention.

EFFECT: higher fail safety.

36 cl, 10 dwg

Ice control device // 2350776

FIELD: engines and pumps.

SUBSTANCE: engine electronic control unit executes program allowing computation of following magnitudes, i.e. fuel injection ratios of the injector fitted in the cylinder (S100), ignition advance with the help of the first card used when the injector fitted inside the cylinder features the fuel injection ratio equals 1. Note here that the first card ensures ignition the (S220), ignition advance with the help of the second card used for the fuel injection ratio that equals zero. Note that the second card ensures ignition time with the minimum advance (S230) and ignition advance with the help of the third card used for fuel injection ratio exceeding zero but smaller than unity. Note that the third card ensures ignition time with higher ignition advance for larger value of ratio (S240).

EFFECT: control device for ICE comprising first and second fuel injection mechanisms participating together in injecting fuel into cylinder and intake manifold and allowing accurate computation of ignition time.

5 cl, 5 dwg

FIELD: physics; control.

SUBSTANCE: invention relates to functional module control systems. The method of operating a control system (V) which controls a set of first functional modules (f1-f4) and second functional modules (g1-g2) is disclosed. A blocking module (I) assigns first control states (s1-s4) a value of which characterises the corresponding functional modules as blocked if an event detector (E) detects corresponding events (e1-e4), after which the control system (V) no longer allows execution of corresponding first functional modules (f1-f4). The blocking module (I) assigns second control states (r1-r2) a value of which characterises the corresponding functional modules as executed if an event detector (E) detects corresponding events (e1-e4), after which the control system (V) allows execution of corresponding second functional modules (g1-f2).

EFFECT: invention improves quality of controlling functional modules.

10 cl, 5 dwg

FIELD: electricity.

SUBSTANCE: electric starting system of automobile engine includes storage battery (1), start and ignition switch (2), thrust relay (3) including winding and closing contact, starter (4), starter interlocking circuit including power transistor (5), control transistor (6) and resistors (7) and (8), isolation diode (9) and sensor (10) of engine operation beginning. Emergency oil pressure sensor consisting of indicating lamp and closing contacts is used as sensor (10) of engine operation beginning.

EFFECT: simpler system and improved operating conditions of storage battery.

1 dwg

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