WO2004016928A1 - Procede pour commander des injecteurs d'un systeme de dosage de carburant d'un moteur a combustion interne - Google Patents

Procede pour commander des injecteurs d'un systeme de dosage de carburant d'un moteur a combustion interne Download PDF

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Publication number
WO2004016928A1
WO2004016928A1 PCT/DE2003/002003 DE0302003W WO2004016928A1 WO 2004016928 A1 WO2004016928 A1 WO 2004016928A1 DE 0302003 W DE0302003 W DE 0302003W WO 2004016928 A1 WO2004016928 A1 WO 2004016928A1
Authority
WO
WIPO (PCT)
Prior art keywords
injection
injector
internal combustion
combustion engine
injectors
Prior art date
Application number
PCT/DE2003/002003
Other languages
German (de)
English (en)
Inventor
Patrick Mattes
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 WO2004016928A1 publication Critical patent/WO2004016928A1/fr

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
    • F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
    • F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
    • F02D41/2425—Particular ways of programming the data
    • F02D41/2429—Methods of calibrating or learning
    • F02D41/2451—Methods of calibrating or learning characterised by what is learned or calibrated
    • F02D41/2464—Characteristics of actuators
    • F02D41/2467—Characteristics of actuators for injectors
    • 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
    • F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
    • F02D41/2409—Addressing techniques specially adapted therefor
    • F02D41/2422—Selective use of one or more tables
    • 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
    • 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
    • F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
    • F02D41/401—Controlling injection timing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/12—Other methods of operation
    • F02B2075/125—Direct injection in the combustion chamber for spark ignition engines, i.e. not in pre-combustion chamber
    • 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
    • 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
    • F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
    • F02D41/2425—Particular ways of programming the data
    • F02D41/2429—Methods of calibrating or learning
    • F02D41/2441—Methods of calibrating or learning characterised by the learning conditions
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Definitions

  • the invention relates to a method for controlling injectors of a fuel metering system of an internal combustion engine according to the preamble of claim 1.
  • a method for controlling an internal combustion engine in which the amount of fuel injected into the combustion chambers of the internal combustion engine and / or the start of delivery is determined by means of a pressure sensor, is disclosed, for example, in DE 44 15 640 AI.
  • a method for controlling a fuel metering system of an internal combustion engine in which a control duration of at least one electrically operated valve determines the amount of fuel to be injected, and in certain operating states the minimum control duration at which fuel is being injected is determined. Starting from a start value, the activation duration is increased or decreased, and the activation duration at which a change in a signal occurs is stored as the minimum activation duration.
  • Electrically operated injectors for fuel injection are used, for example, in so-called common rail systems. With the common rail accumulator injection, pressure generation and injection are decoupled. The injection pressure is generated independently of the engine speed and the injection quantity and is available for injection in the "rail". The injection timing and quantity are calculated in an electronic engine control unit and implemented by an injector on each cylinder of the internal combustion engine via a remote-controlled valve.
  • a quantity map is the relationship between the injection quantity, rail pressure and actuation time. As a result, despite the electrically defined control, each individual injector fills the combustion chamber with different amounts of fuel.
  • the injectors may only have very small tolerances with regard to the injection quantity during operation. These required small tolerances cannot be met due to the mechanical manufacturing tolerances.
  • the injectors are measured for their injection quantity at characteristic operating points after production and classified into classes.
  • the respective class must be known to the engine control unit during operation of the internal combustion engine, so that the control can be adapted to the special characteristics of the class in an injector-specific manner.
  • the class information is stored on the injector, for example by different coding, such as barcode, through resistors on the injector or through plain text on the injector.
  • control unit can read these values from the injector via an interface and use them in subsequent operation.
  • the injectors are now classified, for example, in such a way that the injectors are checked at several test points with regard to the injection quantity metering. This is preferably done in different operating states of the internal combustion engine.
  • the invention is therefore based on the problem of compensating for the quantity drift resulting over the running time of the injectors and thus minimizing the fuel consumption of the internal combustion engine over its running time.
  • Defective common rail injectors are also to be recognized in a simple manner.
  • This object is achieved in a generic method for controlling injectors of a fuel metering system of an internal combustion engine by the features of claim 1.
  • the method according to the invention thus creates a closed quantity control loop which is able to compensate for volume drifts occurring over the life of the common rail injectors.
  • the individual characteristic field of each injector is preferably changed on the basis of the stored correction values. In this way, the volume drifts of the injectors, which are dependent on the service life, are compensated for.
  • An advantageous embodiment provides that the correction is carried out at a predetermined number of operating points, preferably at a plurality of test points, in which an injector quantity comparison is carried out in a manner known per se.
  • the pressure can be detected, for example, by means of a rail pressure sensor. This has the advantage that a compensation of the quantity drifts is continuously possible during the operation of the vehicle. In another embodiment it is provided that the pressure in a pressure line of at least one injector is detected. It is advantageous here that a rail pressure sensor can be dispensed with. In this case, a quantity correction or a defective injector is replaced when the engine is being serviced.
  • Fig. 2 schematically shows the voltage applied to a common rail injector, the injection rate and the rail pressure recorded in a line of the common rail injector over time.
  • the arrangement comprises a high-pressure pump 10, which is connected to the high-pressure accumulator ("rail") 14 via a high-pressure line 12.
  • the high-pressure accumulator 14 is connected to injectors 18 via further high-pressure lines.
  • a high-pressure line 16 and an injector 18 are shown.
  • the injector 18 is installed in an internal combustion engine of a motor vehicle.
  • the system shown is controlled by an engine control unit 20.
  • the injector 18 is controlled by the engine control unit 20.
  • a device 22 for storing information which relates individually to the injector 18 is provided on the injector 18.
  • the information which is stored in the device 22 can be taken into account by the engine control unit 20, so that each injector 18 can be controlled individually.
  • the information is preferably correction values for the quantity map of the injector 18.
  • the device 22 for storing the information can be used, for example, as a data store or as one or more electrical resistors, as a barcode, by means of alphanumeric encryption or the like, or else by one Integrated semiconductor circuit arranged injector 18 can be realized.
  • the engine control unit 20 can also have an integrated semiconductor circuit for evaluating the information stored in the device 22.
  • the injection quantity metered by each injector 18 is determined as a function of the rail pressure in a map that is stored in the engine control unit 20, the map being determined on the basis of several test points that correspond to different operating states of the internal combustion engine. A quantity comparison is carried out in a manner known per se at these test points.
  • the injection quantity is now determined by the injection duration of the injector, that is the time that elapses between the start of injection and the end of injection. In order to enable fuel quantity to be measured in the entire operating range of the internal combustion engine and the injector, the adjustment values are interpolated between the support points defined by the test points.
  • the rail pressure is detected, for example by a pressure sensor 30 arranged in the high pressure line 16, the output signal of which is fed to the engine control unit and / or a modified rail pressure sensor, the output signal of which is also fed to the engine control unit 20.
  • FIG 2 schematically shows the voltage applied to the common rail injector 18, the injection rate and the pressure in the high pressure line 16 detected by the pressure sensor 30.
  • the injection process begins after a time t1 and ends again after a time t2 (see the injection rate versus time curve). Both the start of injection and the end of injection can be determined by measuring the line pressure.
  • An injection in fact triggers a pressure wave, as shown in FIG. 2 below, a significant increase in pressure being observed when the needle of the common rail injector is closed.
  • the opening of the needle of the common rail injector and its closing are therefore by measuring the pressure in the common rail high-pressure line, for example by a sensor 30 arranged therein, and / or also by measuring by a pressure sensor arranged in the high-pressure accumulator 14 32 detectable.
  • the detection takes place at predefinable operating points of the common rail injector, preferably at anyway Quantity comparison used test points (pre-injection, emission point, idling, full load).
  • the start of injection and the end of injection are compared with the start of injection signal and the end of injection signal output by the pressure sensor 30, and in the event of a deviation the start of injection and the duration of injection are varied such that the deviation of the start of injection and the end of injection from that stored injection start and the stored injection end disappears.
  • the individual characteristic map of the injector which is stored in the engine control unit 20, is preferably changed (corrected), so that it is ensured that the target injection quantity is injected into the combustion chamber of the internal combustion engine over the entire service life of the injector ,
  • the optional arrangement of the pressure sensor 30 in the high pressure line 16 has the advantage that a correction of the start of injection and the injection duration is possible during maintenance work. Defective injectors can also be found and replaced in this way.
  • the arrangement of the pressure sensor 30 permanently in the pressure line and / or the arrangement of the pressure sensor 32 in / on the high-pressure accumulator 14 has the advantage that a correction of the start of injection and the injection duration during operation of the vehicle is possible online, so that any quantity drift that may occur of the injector can be corrected continuously.

Abstract

L'invention concerne un procédé servant à commander des injecteurs d'un système de dosage de carburant d'un moteur à combustion interne, selon lequel le début et la fin de l'injection, et donc la durée d'injection qui constitue une mesure de la quantité de carburant injectée, sont déterminés au moyen d'un capteur de pression. Le procédé selon l'invention est caractérisé par les étapes suivantes : le début et la fin de l'injection sont comparés, au niveau d'au moins un point de fonctionnement du moteur à combustion interne, à des valeurs de début et de fin d'injection de ce point de fonctionnement, sauvegardées de préférence dans un champ caractéristique individuel de l'injecteur ; en cas de divergence, le début ou la durée de l'injection sont corrigés de façon à faire disparaître la divergence ; les valeurs de correction sont ensuite sauvegardées.
PCT/DE2003/002003 2002-07-17 2003-06-17 Procede pour commander des injecteurs d'un systeme de dosage de carburant d'un moteur a combustion interne WO2004016928A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10232356A DE10232356A1 (de) 2002-07-17 2002-07-17 Verfahren zur Steuerung von Injektoren eines Kraftstoffzumesssystems einer Brennkraftmaschine
US10232356.9 2002-07-17

Publications (1)

Publication Number Publication Date
WO2004016928A1 true WO2004016928A1 (fr) 2004-02-26

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PCT/DE2003/002003 WO2004016928A1 (fr) 2002-07-17 2003-06-17 Procede pour commander des injecteurs d'un systeme de dosage de carburant d'un moteur a combustion interne

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DE (1) DE10232356A1 (fr)
WO (1) WO2004016928A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7628146B2 (en) * 2004-11-04 2009-12-08 Robert Bosch Gmbh Device and method for correcting the injection behavior of an injector
DE102008000587B4 (de) * 2007-03-26 2015-04-09 Denso Corporation Kraftstoffeinspritzsteuerungssystem und Kraftstoffeinspritzsystem

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10309720B4 (de) * 2003-03-06 2014-04-24 Robert Bosch Gmbh Verfahren und Vorrichtung zur mengendriftkompensierenden Steuerung von Injektoren eines Kraftstoffzumesssystems einer Brennkraftmaschine
DE10317654B4 (de) 2003-04-17 2018-05-30 Robert Bosch Gmbh Verfahren und Vorrichtung zur driftkompensierenden Steuerung von Injektoren eines Kraftstoffzumesssystems einer Brennkraftmaschine
DE102004006896A1 (de) * 2004-02-12 2005-09-15 Mtu Friedrichshafen Gmbh Verfahren zur Steuerung und Regelung einer Brennkraftmaschine
DE102004007048A1 (de) * 2004-02-13 2005-09-01 Robert Bosch Gmbh Verfahren und Vorrichtung zur Steuerung einer Brennkraftmaschine
JP4321342B2 (ja) * 2004-04-22 2009-08-26 株式会社デンソー コモンレール式燃料噴射装置
DE102004050761A1 (de) * 2004-10-16 2006-04-20 Robert Bosch Gmbh Verfahren zum Korrigieren des Einspritzventils wenigstens eines Injektors
FR2901848B1 (fr) * 2006-05-30 2008-09-19 Peugeot Citroen Automobiles Sa Procede et dispositif de correction du debit de l'injection de carburant dit pilote dans un moteur diesel a injection directe du type a rampe commune, et moteur comprenant un tel dispositif
DE102006042098B3 (de) * 2006-09-07 2008-05-21 Siemens Ag Verfahren zur Ermittlung einer Korrektur einer Teileinspritzmenge einer Brennkraftmaschine
DE102007060768A1 (de) 2007-12-17 2009-06-18 Robert Bosch Gmbh Verfahren zur Drifterkennung und Driftkompensation von Injektoren
DE102007062279B4 (de) * 2007-12-21 2017-04-13 Robert Bosch Gmbh Verfahren zum Betreiben einer Brennkraftmaschine
DE102008024546B3 (de) 2008-05-21 2010-01-07 Continental Automotive Gmbh Verfahren zur injektorindividuellen Anpassung der Einspritzzeit von Kraftfahrzeugen
JP5003796B2 (ja) 2010-06-18 2012-08-15 株式会社デンソー 燃料噴射状態検出装置
DE102011007642B3 (de) 2011-04-19 2012-07-26 Continental Automotive Gmbh Verfahren zum Betreiben einer Brennkraftmaschine und Brennkraftmaschine
DE102011085926A1 (de) * 2011-11-08 2013-05-08 Robert Bosch Gmbh Verfahren zum Betreiben einer Brennkraftmaschine
DE102012011484A1 (de) * 2012-06-09 2013-12-12 Volkswagen Aktiengesellschaft Überwachen eines Einspritzvorgangs in einen Verbrennungsmotor
DE102013211731A1 (de) * 2013-06-20 2014-12-24 Mtu Friedrichshafen Gmbh Verfahren zur Korrektur der Einspritzdauer von Injektoren einer Brennkraftmaschine und Steuerungseinrichtung
DE102013211728A1 (de) * 2013-06-20 2014-12-24 Mtu Friedrichshafen Gmbh Verfahren zur Korrektur des Spritzbeginns von Injektoren einer Brennkraftmaschine und Steuerungseinrichtung für eine Brennkraftmaschine
DE102013224706A1 (de) 2013-12-03 2015-06-03 Robert Bosch Gmbh Verfahren zur Berechnung des Einspritzratenverlaufs
DE102014208992A1 (de) 2014-05-13 2015-11-19 Robert Bosch Gmbh Verfahren zur Kalibrierung von Nacheinspritzungen in einem Kraftstoff-Einspritzsystem einer Brennkraftmaschine insbesondere eines Kraftfahrzeugs
DE102021211842A1 (de) 2020-10-30 2022-05-05 Bosch Limited Verfahren zum Identifizieren eines driftenden Injektors in einem Kraftstoffeinspritzsystem
DE102021211924A1 (de) 2020-10-31 2022-05-05 Bosch Limited Verfahren zum Identifizieren eines driftenden Injektors in einem Kraftstoffein-spritzsystem

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DE19733897A1 (de) * 1996-08-05 1998-02-12 Nippon Soken System zur Steuerung eines Kraftstoffeinspritzzeitpunkts für einen Verbrennungsmotor
EP0894965A1 (fr) * 1997-02-07 1999-02-03 Isuzu Motors Limited Procede et dispositif d'injection de carburant d'un moteur
EP0905359A2 (fr) * 1997-09-26 1999-03-31 Isuzu Motors Limited Méthode et dispositif d'injection de carburant pour moteurs à combustion interne
FR2772836A1 (fr) * 1997-12-22 1999-06-25 Siemens Ag Dispositif de determination du debut d'injection dans un moteur a combustion interne a injection directe
EP1236880A1 (fr) * 2001-02-21 2002-09-04 Delphi Technologies, Inc. Méthode de controle de le point d'injection dans un moteur à combustion interne
WO2002086302A1 (fr) * 2001-04-20 2002-10-31 Wolff Controls Corporation Systeme et appareil comprenant un dispositif de diagnostic integre et procedes permettant d'ameliorer l'efficacite en fonctionnement et la durabilite des moteurs a combustion par compression

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19733897A1 (de) * 1996-08-05 1998-02-12 Nippon Soken System zur Steuerung eines Kraftstoffeinspritzzeitpunkts für einen Verbrennungsmotor
EP0894965A1 (fr) * 1997-02-07 1999-02-03 Isuzu Motors Limited Procede et dispositif d'injection de carburant d'un moteur
EP0905359A2 (fr) * 1997-09-26 1999-03-31 Isuzu Motors Limited Méthode et dispositif d'injection de carburant pour moteurs à combustion interne
FR2772836A1 (fr) * 1997-12-22 1999-06-25 Siemens Ag Dispositif de determination du debut d'injection dans un moteur a combustion interne a injection directe
EP1236880A1 (fr) * 2001-02-21 2002-09-04 Delphi Technologies, Inc. Méthode de controle de le point d'injection dans un moteur à combustion interne
WO2002086302A1 (fr) * 2001-04-20 2002-10-31 Wolff Controls Corporation Systeme et appareil comprenant un dispositif de diagnostic integre et procedes permettant d'ameliorer l'efficacite en fonctionnement et la durabilite des moteurs a combustion par compression

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7628146B2 (en) * 2004-11-04 2009-12-08 Robert Bosch Gmbh Device and method for correcting the injection behavior of an injector
DE102008000587B4 (de) * 2007-03-26 2015-04-09 Denso Corporation Kraftstoffeinspritzsteuerungssystem und Kraftstoffeinspritzsystem

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