EP2076667B1 - Procédé et dispositif pour surveiller un système d'injection de carburant - Google Patents

Procédé et dispositif pour surveiller un système d'injection de carburant Download PDF

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Publication number
EP2076667B1
EP2076667B1 EP07803190A EP07803190A EP2076667B1 EP 2076667 B1 EP2076667 B1 EP 2076667B1 EP 07803190 A EP07803190 A EP 07803190A EP 07803190 A EP07803190 A EP 07803190A EP 2076667 B1 EP2076667 B1 EP 2076667B1
Authority
EP
European Patent Office
Prior art keywords
measurement
value
variable
injection
internal combustion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP07803190A
Other languages
German (de)
English (en)
Other versions
EP2076667A1 (fr
Inventor
Dietrich Beckenbauer
Joachim Palmer
Rene Zieher
Peter Kappelmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2076667A1 publication Critical patent/EP2076667A1/fr
Application granted granted Critical
Publication of EP2076667B1 publication Critical patent/EP2076667B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • F02D41/221—Safety or indicating devices for abnormal conditions relating to the failure of actuators or electrically driven elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
    • F02D35/02—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
    • F02D35/023—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions by determining the cylinder pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
    • F02D35/02—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
    • F02D35/027—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions using knock sensors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • F02D2041/224—Diagnosis of the fuel system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
    • F02D41/26—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor
    • F02D41/28—Interface circuits
    • F02D2041/286—Interface circuits comprising means for signal processing
    • F02D2041/288—Interface circuits comprising means for signal processing for performing a transformation into the frequency domain, e.g. Fourier transformation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/06—Fuel or fuel supply system parameters
    • F02D2200/0602—Fuel pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
    • F02D2200/1012—Engine speed gradient
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2250/00—Engine control related to specific problems or objectives
    • F02D2250/14—Timing of measurement, e.g. synchronisation of measurements to the engine cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1497—With detection of the mechanical response of the engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • F02D41/38—Controlling fuel injection of the high pressure type
    • F02D41/3809—Common rail control systems

Definitions

  • the invention relates to an apparatus and a method for monitoring a fuel injection system.
  • the device according to the invention and the method according to the invention with the features of the independent claims has the advantage over the prior art that it provides reliable and simple fault detection in the area of fuel metering and is essentially independent of the injection components used. Ie.
  • the procedure can be used both in common-rail systems, as well as in pump-nozzle systems, and also in conventional distributor injection pumps or series pumps.
  • the method and the device in any injectors in common rail systems, ie in solenoid valve injectors and / or piezoelectric actuators can be used. It is particularly advantageous to monitor the control of the start of injection or of the injection position, since the prior art only provides insufficient monitoring devices for this purpose.
  • a monitoring of the start of injection is advantageous because the start of injection has both an influence on the performance of the internal combustion engine, as well as on the consumption of the internal combustion engine. Furthermore, errors or tolerances at the start of injection also affect the exhaust emissions.
  • the start of injection is usually controlled in order to inject fuel into the cylinders at desired times or desired piston positions of the diesel internal combustion engine. If there are errors or tolerances, so that too early or too late injected, so this is not recognized in conventional injection systems. Such defects may occur in the area of the control unit, the injection system, d. H. the injectors and / or the sensor elements that detect, for example, the start of injection and / or the position of the internal combustion engine occur. Such changes in the start of injection could, among other things, result in a change in the emission behavior, the driving behavior or the noise emission.
  • the error of the detection of the sensor signals, the determination of the manipulated variable in the control unit and / or the actuator, which performs the injection can be assigned.
  • the measured variable used is preferably the rotational speed or a variable which is the torque which is provided by the internal combustion engine.
  • the angular acceleration or another variable derived from the speed signal and / or an angle signal is used as the measured variable.
  • the measured variable is determined from a structure-borne noise signal or a combustion chamber pressure signal.
  • FIG. 1 the device according to the invention is shown as a block diagram.
  • an internal combustion engine is designated, which is associated with at least a first sensor 110 and a controller 120.
  • the sensor 110 acts on a control unit 130 with a signal N and the control unit 130 in turn also acts on the controller 120 with a drive signal A.
  • the control unit 130 processes the output signal of a second sensor 140.
  • the illustrated internal combustion engine 100 is preferably a self-igniting internal combustion engine.
  • the first sensor 110 detects a signal N which corresponds to the rotational speed of the internal combustion engine.
  • different variables can be determined on the basis of the speed signal.
  • filters such as a differentiation, a bandpass filter or a discrete Fourier transform, the angular acceleration or other derivatives of the speed signal.
  • this signal it is also possible to detect other signals which characterize the torque output by the internal combustion engine. For example, based on a structure-borne sound signal or a combustion chamber pressure signal, a variable can be determined and used as a signal that characterizes the torque output by the internal combustion engine.
  • further sensors may be provided, which may be provided with further sizes which characterize the operating state of the internal combustion engine.
  • sensors are, for example, temperature sensors and / or pressure sensors which detect the temperature of the internal combustion engine, the pressure of the fuel and / or other variables.
  • the actuator 120 is preferably an injector that includes a solenoid valve or a piezoactuator.
  • a controller instead of such a controller, other actuators that affect the fuel metering, can be used.
  • a pump-nozzle unit, a distributor pump or a series pump can be provided.
  • the actuator of the internal combustion engine measures a certain amount of fuel at a specific point in time or at a specific position of the crankshaft of the internal combustion engine. It is provided, for example, that the start of energization of the solenoid valve determines the beginning of the injection and the end of the energization determines the end of the injection.
  • the beginning of the energization determines the end and the end of the energizing the beginning of the metering.
  • the difference between the start of energization and the end of the energization essentially determines the energization duration or the duration of the metering and thus the injected fuel quantity.
  • the control unit 130 determines the drive signal based on the signals of the first sensor and the second sensor 140.
  • the second sensor 140 in particular detects variables which characterize the operating state of the vehicle or ambient conditions. In this case, in particular temperature and / or pressure variables are detected. Furthermore, it can be provided that the second sensor or the first sensor detects quantities that characterize the exhaust system of the internal combustion engine. This is it For example, the temperature or the pressure in the exhaust gas or in the intake fresh air.
  • the control unit 130 determines the drive signal A for the actuator 120. It may be provided that only one controller is provided, in which, based on the input variables, a manipulated variable is specified. Furthermore, a regulation can be provided which regulates, for example, the start of activation or another variable characterizing this, such as, for example, the start of injection, the start of combustion or other variables, ie. H. compares with a setpoint and depending on the deviation between the setpoint and actual value, the control signal changed accordingly until the setpoint and the actual value match.
  • the fuel metering has a significant influence on the exhaust emissions.
  • errors throughout the system i. H. in the actuator, in the internal combustion engine, in the sensors 110 or in the control unit 130 effects on the fuel metering. Ie. in case of an error, the desired amount of fuel is not metered at the desired time. This in turn has effects on the behavior of the internal combustion engine, d. H.
  • an increase in fuel consumption and / or increased exhaust emissions Both must be reliably detected and avoided.
  • measured values M are preferably determined from the speed increase.
  • an angular acceleration which is formed by differentiation of the speed signal can be used as the measured value.
  • the result of another filtering method on the speed signal such as bandpass filtering or discrete Fourier transform, may also be used.
  • A0 indicates the output value for the start of control. With this value, the actuator is usually controlled in the present operating conditions. Further, a first drive value A1 and a second value A2 entered for the control start, in which the output value A0 is reduced by a small value or increased by a small value.
  • the measured value change D1 corresponds to the quotient of the measured value M between the state with the start of control A0 and the start of control A1 on. Accordingly, the value D2 indicates the quotient of the measured values between the operating point with the drive value A0 and the drive start A2.
  • the value D0 assumes the value 1, since this indicates the quotient between the start of control A0 and the start of control A0.
  • step 300 the usual in the operating state control signal output with the control start A0 and the measured value M0 is detected.
  • step 310 the start of control is changed to the value A1 and the measured value M1 is detected.
  • step 320 the value for the start of control is set to the value A2 and the measured value M2 is determined.
  • the measured values used are preferably the rotational speed or variables derived from the rotational speed. As an alternative to the rotational speed, other variables that characterize the torque output by the internal combustion engine can also be evaluated.
  • the quotient D1, d. H. the quotient between the measured value M1 and the measured value M0 is determined.
  • the quotient D2, d. H. the quotient between the measured value M2 and M0 is calculated.
  • the difference V between the two quotients D1 and D2 is determined.
  • the subsequent query 360 checks whether the difference V is smaller than a first threshold S1. If so, the program ends in step 370 with a detection for errors. If the query 360 recognizes that the difference V is not smaller than the threshold value S1, then the query 380 follows. This checks whether the difference V is greater than or equal to the second threshold value S2. If so, then an error is also detected in step 370. If this is not the case, a fault-free state is detected in step 390.
  • Ie it is checked whether the difference of the quotients of measured values determined from the rotational speed lies in a specific measuring window, which is defined by the values S1 and S2, where S1 is smaller than S2. If this is the case, ie the measured values for the difference V are in this Window, is detected on a faultless and otherwise on a faulty operating state.
  • control start is changed by further smaller amounts or by an amount between A0 and A1 or between A0 and A2 and the corresponding differences are calculated and evaluated accordingly.
  • a plurality of ratios are formed and these are likewise compared with threshold values. Ie. It is checked whether a change in the start of control results in an expected change in the speed or another measured variable. It is particularly advantageous if, instead of the rotational speed, a variable is evaluated which characterizes the torque provided by the internal combustion engine.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Claims (3)

  1. Procédé de surveillance d'un système d'injection de carburant, dans lequel une grandeur de réglage, qui influence le début de l'injection, est modifiée selon deux valeurs déterminées, et une première valeur de mesure (M0) d'une grandeur de mesure est détectée avant la modification et deux deuxièmes valeurs de mesure (M1, M2) sont détectées après les modifications respectives, deux quotients (D1, D2) entre les deux deuxièmes valeurs de mesure (M1, M2) et la première valeur de mesure (M0) étant déterminés, et une erreur étant reconnue lorsque la différence (V) entre les deux quotients (D1, D2) est en dehors d'une fenêtre de mesure.
  2. Procédé selon la revendication 1, caractérisé en ce que la grandeur de mesure est le régime ou une grandeur qui caractérise le couple qui est fourni par le moteur à combustion interne.
  3. Dispositif de surveillance d'un système d'injection de carburant, comprenant des moyens qui modifient, selon deux valeurs déterminées, une grandeur de réglage qui influence le début de l'injection, et qui détectent une première valeur de mesure (M0) d'une grandeur de mesure avant la modification et deux deuxièmes valeurs de mesure (M1, M2) après les modifications respectives, les moyens déterminant deux quotients (D1, D2) entre les deux deuxièmes valeurs de mesure (M1, M2) et la première valeur de mesure (M0), et reconnaissant une erreur lorsque la différence (V) entre les deux quotients (D1, D2) est en dehors d'une fenêtre de mesure.
EP07803190A 2006-10-02 2007-09-04 Procédé et dispositif pour surveiller un système d'injection de carburant Not-in-force EP2076667B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006046840A DE102006046840A1 (de) 2006-10-02 2006-10-02 Verfahren und Vorrichtung zur Überwachung eines Kraftstoffeinspritzsystems
PCT/EP2007/059212 WO2008040605A1 (fr) 2006-10-02 2007-09-04 Procédé et dispositif pour surveiller un système d'injection de carburant

Publications (2)

Publication Number Publication Date
EP2076667A1 EP2076667A1 (fr) 2009-07-08
EP2076667B1 true EP2076667B1 (fr) 2012-11-14

Family

ID=38692032

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07803190A Not-in-force EP2076667B1 (fr) 2006-10-02 2007-09-04 Procédé et dispositif pour surveiller un système d'injection de carburant

Country Status (5)

Country Link
US (1) US8166806B2 (fr)
EP (1) EP2076667B1 (fr)
CN (1) CN101523037B (fr)
DE (1) DE102006046840A1 (fr)
WO (1) WO2008040605A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010029840B4 (de) * 2010-06-09 2023-03-23 Robert Bosch Gmbh Verfahren zum Betreiben einer Brennkraftmaschine
US9657653B2 (en) 2014-06-09 2017-05-23 Caterpillar Inc. Gas pressure high and low detection
DE102016219577B4 (de) * 2016-10-10 2018-09-27 Continental Automotive Gmbh Verfahren und Vorrichtung zum Betreiben einer Brennkraftmaschine
DE102016219572B3 (de) 2016-10-10 2017-11-30 Continental Automotive Gmbh Verfahren und Vorrichtung zum Betreiben einer Brennkraftmaschine
DE102016219575B3 (de) * 2016-10-10 2017-11-30 Continental Automotive Gmbh Verfahren und Vorrichtung zum Betreiben einer Brennkraftmaschine

Family Cites Families (15)

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Publication number Priority date Publication date Assignee Title
JPS60142035A (ja) * 1983-12-29 1985-07-27 Mazda Motor Corp エンジンの燃料供給装置
DE19520300A1 (de) 1995-06-02 1996-12-05 Bosch Gmbh Robert Einrichtung zur Erkennung eines Lecks in einem Kraftstoffversorgungssystem
JPH0968086A (ja) * 1995-08-31 1997-03-11 Nissan Motor Co Ltd 燃料ポンプ
US5945596A (en) * 1995-09-28 1999-08-31 Robert Bosch Gmbh Method and device for monitoring a fuel-metering system
DE19548279B4 (de) 1995-09-28 2006-12-14 Robert Bosch Gmbh Verfahren und Vorrichtung zur Überwachung eines Kraftstoffzumeßsystems
US6311674B1 (en) * 1998-04-15 2001-11-06 Denso Corporation Fuel injection system for internal combustion engine
JP2001098989A (ja) * 1999-09-29 2001-04-10 Mazda Motor Corp エンジンの制御装置及びエンジンの制御装置の異常診断装置
IT1319633B1 (it) * 2000-01-18 2003-10-20 Fiat Ricerche Metodo di valutazione della funzionalita' di un impianto di iniezionea collettore comune di un motore a combustione interna.
US6557530B1 (en) * 2000-05-04 2003-05-06 Cummins, Inc. Fuel control system including adaptive injected fuel quantity estimation
IT1321068B1 (it) * 2000-11-14 2003-12-30 Fiat Ricerche Metodo di diagnosi di perdite in un impianto di iniezione a collettore comune di un motore a combustione interna.
JP3894088B2 (ja) * 2002-10-07 2007-03-14 株式会社日立製作所 燃料供給装置
JP3972881B2 (ja) * 2003-09-30 2007-09-05 トヨタ自動車株式会社 内燃機関の燃料噴射制御装置
JP4438553B2 (ja) * 2004-07-30 2010-03-24 トヨタ自動車株式会社 内燃機関の高圧燃料系統の制御装置
DE102007021594B4 (de) * 2007-05-08 2016-06-02 Continental Automotive Gmbh Verfahren zur Diagnose der Undichtigkeit eines Injektors sowie zugehöriges Steuergerät
DE102008044050A1 (de) * 2007-12-19 2009-06-25 Robert Bosch Gmbh Verfahren zum Betreiben eines Kraftstoffsystems

Also Published As

Publication number Publication date
US8166806B2 (en) 2012-05-01
CN101523037A (zh) 2009-09-02
EP2076667A1 (fr) 2009-07-08
WO2008040605A1 (fr) 2008-04-10
CN101523037B (zh) 2013-03-27
DE102006046840A1 (de) 2008-04-03
US20100050755A1 (en) 2010-03-04

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