EP0811116A1 - Procede et dispositif de controle du systeme de dosage de carburant d'un moteur a combustion interne - Google Patents

Procede et dispositif de controle du systeme de dosage de carburant d'un moteur a combustion interne

Info

Publication number
EP0811116A1
EP0811116A1 EP96926997A EP96926997A EP0811116A1 EP 0811116 A1 EP0811116 A1 EP 0811116A1 EP 96926997 A EP96926997 A EP 96926997A EP 96926997 A EP96926997 A EP 96926997A EP 0811116 A1 EP0811116 A1 EP 0811116A1
Authority
EP
European Patent Office
Prior art keywords
pressure
internal combustion
combustion engine
expected value
pressure signal
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.)
Granted
Application number
EP96926997A
Other languages
German (de)
English (en)
Other versions
EP0811116B1 (fr
Inventor
Detlev Straub
Jürgen Biester
Martin Grosser
Claus Hinrichsen
Wilhelm Eyberg
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 EP0811116A1 publication Critical patent/EP0811116A1/fr
Application granted granted Critical
Publication of EP0811116B1 publication Critical patent/EP0811116B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • F02D41/30—Controlling fuel injection
    • F02D41/38—Controlling fuel injection of the high pressure type
    • F02D41/3809—Common rail control systems
    • F02D41/3836—Controlling the fuel pressure
    • F02D41/3863—Controlling the fuel pressure by controlling the flow out of the common rail, e.g. using pressure relief valves
    • 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
    • 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
    • F02D41/222—Safety or indicating devices for abnormal conditions relating to the failure of sensors or parameter detection devices
    • 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
    • F02D41/222—Safety or indicating devices for abnormal conditions relating to the failure of sensors or parameter detection devices
    • F02D2041/223—Diagnosis of fuel pressure sensors
    • 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
    • F02D2200/06—Fuel or fuel supply system parameters
    • F02D2200/0602—Fuel pressure
    • F02D2200/0604—Estimation of fuel pressure
    • 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
    • F02D41/04—Introducing corrections for particular operating conditions
    • F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
    • F02D41/062—Introducing corrections for particular operating conditions for engine starting or warming up for starting
    • 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
    • F02D41/04—Introducing corrections for particular operating conditions
    • F02D41/12—Introducing corrections for particular operating conditions for deceleration
    • F02D41/123—Introducing corrections for particular operating conditions for deceleration the fuel injection being cut-off

Definitions

  • the invention relates to a method and a device for monitoring a fuel metering system of an internal combustion engine according to the preambles of the independent claims.
  • Preliminary pump fuel from a low pressure area m a high pressure area. From there, the fuel is metered to the individual combustion chambers of the internal combustion engine by means of controllable injectors.
  • the injectors are controlled depending on the operating state of the internal combustion engine.
  • a sensor detects the pressure in the high-pressure range, which is taken into account in the control.A precise fuel metering is only possible if the exact value of the Pressure in the high pressure range is known.
  • the pressure In common rail systems, the pressure is in the range between a few 100 to approx. 2000 bar Range, the pressure sensor must reliably provide a signal. A failure of the pressure sensor or a faulty signal from the pressure sensor leads to an inaccurate fuel metering.
  • the invention has for its object to improve the accuracy of the fuel metering in a method and a device of the type mentioned. This object is achieved by the features characterized in the independent claims.
  • DE-OS 43 35 700 discloses a device and a method in which a drift of the output signal of a position sensor is reliably detected.
  • the measured variable is recorded in certain operating states in which the position of an actuator is approximately known and compared with the expected value. Based on this comparison, a drift or an error of the position sensor can be recognized.
  • FIG. 1 shows a block diagram of a common rail system
  • FIG. 2 shows a flow diagram of the method according to the invention
  • a controller is designated by 100.
  • a pressure controller 101 which controls em switching means 102 and is acted upon by the output signals of a current measuring means 103.
  • Current control 101 also processes the output signal of a pressure sensor 110 and the output signals of further sensors 105.
  • the first input of switching means 102 is connected to battery voltage via current measuring means 103.
  • the second connection of the switching means 102 is in contact with a coil 115, the second input of which is connected to ground.
  • the further sensors 105 are sensors which detect various operating states of the internal combustion engine and of the vehicle driven by the internal combustion engine. These are, for example, the engine speed N and the accelerator pedal position, which characterize the driver's request.
  • the pressure sensor 110 detects the pressure in a rail 112, which is assigned to the high-pressure region of the fuel metering system.
  • the Rail 112 is in contact with various injectors 111 m.
  • the rail 112 is connected to a high-pressure pump 125 via a high-pressure line 122.
  • the high-pressure line 122 is also connected to a via a pressure control valve 120 Return line 121 in contact.
  • the high-pressure pump 125 is connected to a prefeed pump 127 and a filter 129 to a tank.
  • the return line 121 is also connected to the tank.
  • the prefeed pump 127 conveys the fuel via the filter 129 from the tank to the high-pressure pump 125. This area is referred to as the low-pressure area.
  • the high-pressure pump 125 delivers the fuel under high pressure via the
  • the pressure in the rail 112 and thus in the high-pressure area is detected by means of the pressure sensor 110 and fed to the controller 100.
  • the controller 100 applies control signals to the injectors 111, which control the fuel metering.
  • High-pressure line 122 and thus in rail 112 are set to predeterminable values.
  • the pressure control valve 120 is designed in such a way that it releases the connection to the return line 121 at a predeterminable pressure in the high-pressure region and thus the pressure is reduced until it drops below the predeterminable pressure value.
  • the pressure value at which the pressure control valve 120 enables the connection can be set by means of the coil 115. Depending on the current I flowing through the coil 115, different pressure values are set in the high pressure range.
  • a step 200 it is checked whether there is a defined operating state. If this is the case, m
  • Step 210 detects the actual pressure PI from the pressure sensor 110.
  • an expected value PS for the pressure is determined on the basis of various quantities, which are detected by sensors 225.
  • the value PS is preferably dependent on suitable sizes from one
  • Map memory read out.
  • the two pressure values PI and PS are checked for plausibility.
  • step 200 If the measured pressure value PI is plausible, the program continues with step 200. If query 230 recognizes that the values are not plausible, the measured values PI are corrected in step 250 or an error is recognized.
  • errors are recognized in the case of implausible pressure values. This is displayed in step 250. This can be done using a
  • drift is recognized and corrected.
  • the difference between the expected value PS and the measured value PI is determined in step 250.
  • a correction value for the measured value PI can then be determined on the basis of this difference.
  • the measured value is continuously corrected with this correction value.
  • it is checked in step 200 whether there is overrun operation. No fuel is usually injected in overrun mode. If the overrun mode is recognized, the pressure control valve 120 is activated such that it remains in its open position. The pressure value PS which now arises has only a relatively small scatter. According to the invention, the value PS expected for this operating state is stored as a function of the speed N in a map. If the measured pressure PI deviates from the speed-dependent value PS by more than a predefinable threshold value, an error is recognized in step 250.
  • the check is carried out before the internal combustion engine starts or after the internal combustion engine is switched off.
  • the pressure control valve 120 is usually controlled so that the pressure is reduced.
  • the pressure usually decreases to atmospheric pressure or decreases to a predetermined value. This predetermined value depends on the design of the pressure control valve. According to the invention, it is therefore checked in query 200 whether the internal combustion engine is switched off, that is to say whether it is before the start or in the wake.
  • the program is automatically processed from step 210 before the start or after the shutdown.
  • the pressure PI is detected and with a predetermined value which depends on the pressure control valve 120 used. Is the pressure control valve designed so that it reduces the pressure to atmospheric pressure enables, an output signal of an atmospheric pressure sensor can be used as a comparison value PS.
  • the expected value PS and the measured value PI differ from one another by more than a permissible difference value, an error or drift is recognized. If an error is detected, the start of the internal combustion engine can be prevented.
  • the detected value PI of the pressure is compared with a value PS which depends on the current I which flows through the pressure control valve 115.
  • a value PS which depends on the current I which flows through the pressure control valve 115.
  • a setpoint PS is specified in step 220 for the setpoint value of the pressure.
  • the expected pressure value is preferably stored as a function of the current in a characteristic diagram. This procedure enables the correct functioning of the pressure sensor to be checked without the use of further sensors.

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)
  • Fuel-Injection Apparatus (AREA)

Abstract

L'invention concerne un procédé et un dispositif de contrôle du système de dosage de carburant d'un moteur à combustion interne. Le carburant est refoulé par une pompe d'une zone de basse pression à une zone de haute pression, d'où il est amené aux chambres de combustion du moteur à combustion interne par des injecteurs réglables en fonction des caractéristiques de fonctionnement du moteur. Un capteur génère un signal de pression qui caractérise la pression dans la zone de haute pression. Dans des états de fonctionnement prédéterminés, le signal de pression est comparé à une valeur attendue, ce qui permet de reconnaître un signal de pression non conforme.
EP96926997A 1995-12-20 1996-07-18 Procede et dispositif de controle du systeme de dosage de carburant d'un moteur a combustion interne Expired - Lifetime EP0811116B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19547647 1995-12-20
DE19547647A DE19547647A1 (de) 1995-12-20 1995-12-20 Verfahren und Vorrichtung zur Überwachung eines Kraftstoffzumeßsystems einer Brennkraftmaschine
PCT/DE1996/001349 WO1997022791A1 (fr) 1995-12-20 1996-07-18 Procede et dispositif de controle du systeme de dosage de carburant d'un moteur a combustion interne

Publications (2)

Publication Number Publication Date
EP0811116A1 true EP0811116A1 (fr) 1997-12-10
EP0811116B1 EP0811116B1 (fr) 2000-04-26

Family

ID=7780699

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96926997A Expired - Lifetime EP0811116B1 (fr) 1995-12-20 1996-07-18 Procede et dispositif de controle du systeme de dosage de carburant d'un moteur a combustion interne

Country Status (5)

Country Link
EP (1) EP0811116B1 (fr)
JP (1) JP4073485B2 (fr)
KR (1) KR100413305B1 (fr)
DE (2) DE19547647A1 (fr)
WO (1) WO1997022791A1 (fr)

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DE19757594C2 (de) * 1997-12-23 2002-11-28 Siemens Ag Verfahren und Vorrichtung zur Funktionsüberwachung eines Druckreglers
US6076504A (en) * 1998-03-02 2000-06-20 Cummins Engine Company, Inc. Apparatus for diagnosing failures and fault conditions in a fuel system of an internal combustion engine
DE19827557B4 (de) * 1998-06-20 2004-07-08 Robert Bosch Gmbh Verfahren zum Erkennen eines Fahrzeug-Crashes
DE19834660A1 (de) 1998-07-31 2000-02-03 Bosch Gmbh Robert Verfahren und Vorrichtung zur Überwachung eines Kraftstoffzumeßsystems
CA2298305A1 (fr) * 1999-07-07 2001-01-07 Jason Edward Yost Systeme de detection du reglage de l'injection de carburant
DE10003906A1 (de) * 2000-01-29 2001-08-09 Bosch Gmbh Robert Verfahren und Vorrichtung zum Kalibrieren eines Drucksensors
DE10030935A1 (de) * 2000-06-24 2002-01-03 Bosch Gmbh Robert Verfahren und Vorrichtung zum Kalibrieren eines Drucksensors in einem Kraftstoffzumesssystem
DE60121113T2 (de) * 2000-11-06 2006-11-09 Honda Giken Kogyo K.K. Vorrichtung zur Fehlerbestimmung eines Feuchtigkeitssensors und Vorrichtung zur Steuerung eines Umschaltventils im Abgassystem
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WO2003064839A1 (fr) * 2002-01-29 2003-08-07 Yamaha Hatsudoki Kabushiki Kaisha Unite d'affichage d'auto-diagnostic
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JP4407611B2 (ja) * 2005-10-06 2010-02-03 株式会社デンソー 燃料噴射制御装置
DE102007028900B4 (de) 2007-06-22 2013-06-27 Continental Automotive Gmbh Verfahren und Vorrichtung zur Diagnose eines mit einer Kraftstoffverteilerleiste in Verbindung stehenden Einspritzventils einer Brennkraftmaschine
DE102008024955B3 (de) 2008-05-23 2009-12-24 Continental Automotive Gmbh Verfahren zur Erkennung einer Fehlfunktion eines Raildrucksensors bei einem Common Rail-Einspritzsystem
JPWO2011007772A1 (ja) * 2009-07-15 2012-12-27 ボッシュ株式会社 圧力センサ故障診断方法及びコモンレール式燃料噴射制御装置
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DE102009051023B4 (de) * 2009-10-28 2015-01-15 Audi Ag Verfahren zum Betreiben eines Antriebsaggregats sowie Antriebsaggregat
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DE102011101825A1 (de) * 2011-05-17 2012-11-22 Daimler Ag Kraftfahrzeugmotorsteuervorrichtung
KR101601460B1 (ko) * 2014-08-04 2016-03-09 현대자동차주식회사 압력센서 오프셋 보정 시스템 및 방법
DE102016220123B4 (de) * 2016-10-14 2018-05-09 Continental Automotive Gmbh Verfahren und Vorrichtung zur Plausibilierung der Funktionsfähigkeit eines Hochdrucksensors eines Kraftstoffeinspritzsystems eines Kraftfahrzeugs
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Also Published As

Publication number Publication date
EP0811116B1 (fr) 2000-04-26
JPH11506813A (ja) 1999-06-15
WO1997022791A1 (fr) 1997-06-26
DE19547647A1 (de) 1997-06-26
KR100413305B1 (ko) 2004-05-10
KR19980702318A (ko) 1998-07-15
JP4073485B2 (ja) 2008-04-09
DE59605057D1 (de) 2000-05-31

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