EP1278950B1 - Procede pour faire fonctionner un systeme d'alimentation en carburant d'un moteur a combustion interne, notamment dans un vehicule automobile - Google Patents

Procede pour faire fonctionner un systeme d'alimentation en carburant d'un moteur a combustion interne, notamment dans un vehicule automobile Download PDF

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Publication number
EP1278950B1
EP1278950B1 EP01935988A EP01935988A EP1278950B1 EP 1278950 B1 EP1278950 B1 EP 1278950B1 EP 01935988 A EP01935988 A EP 01935988A EP 01935988 A EP01935988 A EP 01935988A EP 1278950 B1 EP1278950 B1 EP 1278950B1
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EP
European Patent Office
Prior art keywords
pressure
control valve
internal combustion
combustion engine
pressure control
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.)
Expired - Lifetime
Application number
EP01935988A
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German (de)
English (en)
Other versions
EP1278950A1 (fr
Inventor
Walter Lorch
Gerhard Wiltschek
Harald Lang
Hansjoerg Bochum
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 EP1278950A1 publication Critical patent/EP1278950A1/fr
Application granted granted Critical
Publication of EP1278950B1 publication Critical patent/EP1278950B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F02D41/30—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
    • F02D41/30—Controlling fuel injection
    • F02D41/38—Controlling fuel injection of the high pressure type
    • 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
    • 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
    • F02D41/30—Controlling fuel injection
    • F02D41/38—Controlling fuel injection of the high pressure type
    • F02D2041/389—Controlling fuel injection of the high pressure type for injecting directly into the cylinder
    • 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
    • F02D2250/00—Engine control related to specific problems or objectives
    • F02D2250/31—Control of the 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
    • F02D41/12—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 for operating a Fuel supply system for an internal combustion engine in particular of a motor vehicle, wherein the fuel of a pump is pumped into a pressure accumulator, in which the pressure in the pressure accumulator is measured, and in the the pressure in the accumulator by the control of a Pressure control valve is changeable. Furthermore it concerns the invention a corresponding Fuel supply system for an internal combustion engine and a control device for such Fuel supply system.
  • the so-called Direct injection it is necessary that the fuel is injected under pressure into the combustion chamber.
  • a pressure accumulator provided in the Fuel pumped by a pump and under a high pressure is set. From there, the fuel will be via injection valves into the combustion chambers of the Internal combustion engine injected.
  • the object of the invention is in the Fuel supply system for a Internal combustion engine one slowly occurring error of the pressure control valve quickly and sure to recognize. This task will solved with the features of the independent claims.
  • This dynamic pressure can be intact Pressure control valve to be determined in advance.
  • the dynamic pressure is in particular parameters of the pressure control valve dependent, such as the flow cross-section thereof.
  • the inventive method can quickly and without a substantial additional effort. Of further can be reliably detected by the method, whether the pressure control valve is intact or not.
  • the inventive method can in the operation of the Internal combustion engine, but also as part of a review the same e.g. be done in a workshop.
  • the expected pressure depending on parameters of a intact pressure control valve and / or depending on determined current operating variables of the internal combustion engine.
  • the internal combustion engine in the push mode or in idle mode are operating states of the Internal combustion engine in which the inventive Procedure is particularly good.
  • FIG. 1 shows a fuel supply system 1 shown for use in a Internal combustion engine of a motor vehicle is provided.
  • a So-called common rail system in particular in a Internal combustion engine with direct injection for use comes.
  • Such common rail systems are of gasoline; as Also known from diesel internal combustion engines.
  • the fuel supply system 1 has a pressure accumulator 2, which with a pressure sensor 3 and a Pressure control valve 4 is provided.
  • the accumulator 2 is via a pressure line 5 with a high pressure pump. 6 connected.
  • the high pressure pump 6 is via a pressure line 8 connected to the pressure control valve 4.
  • Over a Pressure line 9 and a filter is the pressure control valve. 4 and thus also the high pressure pump 6 with a preferably electric fuel pump 10 connected to it is suitable for fuel from a fuel tank 11th to suck.
  • the fuel supply system 2 has four Injection valves 13, which via pressure lines 14 with the Pressure accumulator 2 are connected.
  • the injection valves 13 are capable of delivering fuel into appropriate combustion chambers to inject the internal combustion engine.
  • the pressure sensor 3 By means of a signal line 15, the pressure sensor 3 with a control unit 16 connected to the one further Plurality of signal lines other than input lines are connected.
  • a signal line 17 is the Fuel pump 10 and a signal line 18 is the Pressure control valve 4 connected to the control unit 16.
  • the injection valves 13 by means Signal lines 19 connected to the control unit 16.
  • the fuel is from the fuel pump 10 from the Fuel tank 11 pumped to the high-pressure pump 6.
  • the high-pressure pump 6 is in the pressure accumulator 2 a Generates pressure, which is measured by the pressure sensor 3 and by a corresponding actuation of the pressure control valve 4 can be set to a desired value.
  • the injectors 13 will then be the fuel in the Combustion chamber of the internal combustion engine injected.
  • Fuel quantity or fuel mass is among others Pressure in the pressure accumulator 2 essential.
  • This pressure in the pressure accumulator 2 can from be set and adjusted the control unit 16.
  • control unit 16 controls the pressure control valve. 4 in its closed state, so that the high pressure pump 6 and the fuel pump 10 one more and more generate increasing pressure in the pressure accumulator 2. Conversely, the controller 16 controls the pressure control valve 4 in its open state, so that the fuel off the pressure accumulator 2 flows again and the pressure in the accumulator 2 again reduced.
  • a dynamic pressure builds up the pressure control valve 4.
  • This dynamic pressure is of the free flow cross-section of the pressure control valve 4 and depending on the amount of fuel flowing through.
  • the latter amount of fuel is again among other things depending on the speed of the internal combustion engine, the amount of the pumped fuel and the amount of in the Internal combustion engine of injected fuel.
  • the method of Figure 2 is a creeping Pollution of the pressure control valve 4 detected.
  • the method of Figure 2 is the control unit 16 carried out.
  • a block 21 is checked by the controller 16, whether the temperature of the internal combustion engine in one permissible range is located. This is required with it the method of Figure 2 are performed reliably can. If the temperature is not within the permissible range Range, the method of Figure 2 is aborted and restarted at a later date.
  • a subsequent block 22 checks whether the internal combustion engine is in the state of Thrust shutdown is located.
  • the Internal combustion engine driven "from the outside".
  • the Internal combustion engine rolling downhill Motor vehicle "pushed”. The condition is therefore too referred to as pushing operation (or overrun operation).
  • the pressure in the pressure accumulator 2 measured. This measurement is caused by the controller 16 and carried out. Due to the completely open Pressure control valve 4 is this measured Pressure around the back pressure on the pressure control valve. 4
  • the control unit 16 calculated a reference value for the dynamic pressure.
  • Comparison value is an expected pressure, which would have to adjust with intact pressure control valve 4.
  • the comparison value depends on the current one Operating state of the internal combustion engine, ie of the current operating variables thereof, such as e.g. their Speed, engine temperature, and the like. Furthermore is the comparison value depends on parameters of the Pressure control valve 4, which in a characteristic or a Map are stored in the controller 16. The mentioned parameters refer to an intact Pressure control valve 4 and can in particular in advance on a new pressure control valve 4 is determined and then in the Control unit 16 are stored.
  • Control unit 16 checks if the internal combustion engine is still in the state of fuel cutoff. Is this no longer the case, then the method of Figure 2 canceled and repeated at a later date.
  • Block 28 is the measured back pressure with the comparison value (MaxValue) compared. Is the measured dynamic pressure smaller? as the comparison value, it is from the control unit 16 in a block 29 on an intact pressure control valve. 4 closed.
  • the mentioned parameters of the intact pressure control valve 4 can be general for a particular Internal combustion engine type, but also individually for each Internal combustion engine can be determined and stored. at an exchange of the pressure control valve 4 can new Parameter determined and read into the control unit 16 become.

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

Abstract

L'invention concerne le système d'alimentation en carburant (1) d'un moteur à combustion interne, notamment d'un véhicule automobile. Dans un système d'alimentation en carburant (1), le carburant est pompé par une pompe (6, 10) qui l'achemine dans un accumulateur de pression (2). La pression dans l'accumulateur de pression (2) est mesurée et peut être modifiée par l'actionnement d'une soupape de régulation de pression (4). L'invention est caractérisée en ce qu'un appareil de commande (16) peut provoquer l'ouverture complète de la soupape de régulation de pression (4) et comparer la pression mesurée dans l'accumulateur de pression (2) avec une valeur de pression souhaitée.

Claims (10)

  1. Procédé de fonctionnement d'un système d'alimentation en carburant (1) pour un moteur à combustion interne, en particulier d'un véhicule automobile, avec une pompe (6, 10) qui refoule du carburant dans un accumulateur de pression (2), selon lequel on mesure la pression (prist) régnant dans l'accumulateur de pression (2) et qui peut être modifiée en commandant une soupape de commande de pression (4),
    caractérisé en ce qu'
    on ouvre complètement la soupape de commande de pression (4), et lorsque la soupape de commande de pression (4) est entièrement ouverte la pression mesurée est la pression dynamique au niveau de la soupape de commande de pression (4), on compare la pression mesurée dans l'accumulateur de pression (2) à une pression escomptée, qui est une valeur comparative pour la pression dynamique, et on détermine l'aptitude au fonctionnement de la soupape de commande de pression (4) sur la base de la comparaison.
  2. Procédé selon la revendication 1,
    caractérisé en ce que
    la pression régnant dans l'accumulateur de pression (2) est mesurée seulement après écoulement d'un temps d'attente après l'ouverture de la soupape de commande de pression (4).
  3. Procédé selon une des revendications 1 ou 2,
    caractérisé en ce que
    la pression escomptée est déterminée en fonction de paramètres d'une soupape de commande de pression (4) intacte.
  4. Procédé selon une des revendications 1 à 3,
    caractérisé en ce que
    la pression escomptée est déterminée en fonction de grandeurs de fonctionnement actuelles du moteur à combustion interne.
  5. Procédé selon une des revendications 1 à 4,
    caractérisé en ce que
    la soupape de commande de pression est classée comme encrassée lorsque la pression mesurée est plus élevée que la pression escomptée.
  6. Procédé selon une des revendications précédentes,
    caractérisé en ce que
    le moteur à combustion interne se trouve en poussée ou au ralenti.
  7. Procédé selon une des revendications précédentes,
    caractérisé en ce que
    la température et/ou la vitesse de rotation du moteur à combustion interne se trouvent dans une plage admissible.
  8. Elément de commande électrique, en particulier mémoire flash ou mémoire morte, pour un appareil de commande (16) d'un moteur à combustion interne, en particulier d'un véhicule automobile, sur lequel est enregistré un programme qui peut être exécuté sur un calculateur, en particulier sur un microprocesseur et qui est approprié pour la mise en oeuvre d'un procédé selon une des revendications 1 à 7.
  9. Appareil de commande (16) pour un système d'alimentation en carburant (1) d'un moteur à combustion interne, en particulier d'un véhicule automobile, avec dans le système d'alimentation en carburant (1), une pompe (6, 10) qui refoule du carburant dans un accumulateur de pression (2), et qui mesure la pression (prist) régnant dans l'accumulateur de pression (2) qui peut être modifiée commandant une soupape de commande de pression (4),
    caractérisé en ce qu'
    l'appareil de commande (16), ouvre complètement la soupape de commande de pression (4) et du fait que la soupape de commande de pression (4) est entièrement ouverte, la pression mesurée est la pression dynamique au niveau de la soupape de commande de pression (4), l'appareil de commande (16) compare la pression mesurée dans l'accumulateur de pression (2) à une pression escomptée, qui est une valeur comparative pour la pression dynamique, et on détermine l'aptitude au fonctionnement de la soupape de commande de pression (4) sur la base de la comparaison.
  10. Système d'alimentation en carburant (1) pour un moteur à combustion interne, en particulier d'un véhicule automobile, qui refoule du carburant avec une pompe (6, 10) qui refoule du carburant dans un accumulateur de pression (2), dans lequel la pression (prist) régnant dans l'accumulateur de pression (2) peut être mesurée et modifiée en commandant une soupape de commande de pression (4), et comprenant aussi un appareil de commande (16),
    caractérisé en ce que
    l'appareil de commande (16), ouvre complètement la soupape de commande de pression (4) et du fait que la soupape de commande de pression (4) est entièrement ouverte, la pression mesurée est la pression dynamique au niveau de la soupape de commande de pression (4), l'appareil de commande (16) compare la pression mesurée dans l'accumulateur de pression (2) à une pression escomptée, qui est une valeur comparative pour la pression dynamique, et on détermine l'aptitude au fonctionnement de la soupape de commande de pression (4) sur la base de la comparaison.
EP01935988A 2000-04-27 2001-04-24 Procede pour faire fonctionner un systeme d'alimentation en carburant d'un moteur a combustion interne, notamment dans un vehicule automobile Expired - Lifetime EP1278950B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10020629 2000-04-27
DE10020629A DE10020629A1 (de) 2000-04-27 2000-04-27 Verfahren zum Betreiben eines Kraftstoffversorgungssystems für eine Brennkraftmaschine insbesondere eines Kraftfahrzeugs
PCT/DE2001/001556 WO2001081747A1 (fr) 2000-04-27 2001-04-24 Procede pour faire fonctionner un systeme d'alimentation en carburant d'un moteur a combustion interne, notamment dans un vehicule automobile

Publications (2)

Publication Number Publication Date
EP1278950A1 EP1278950A1 (fr) 2003-01-29
EP1278950B1 true EP1278950B1 (fr) 2005-11-02

Family

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EP01935988A Expired - Lifetime EP1278950B1 (fr) 2000-04-27 2001-04-24 Procede pour faire fonctionner un systeme d'alimentation en carburant d'un moteur a combustion interne, notamment dans un vehicule automobile

Country Status (6)

Country Link
EP (1) EP1278950B1 (fr)
JP (1) JP4546691B2 (fr)
KR (1) KR20020089534A (fr)
DE (2) DE10020629A1 (fr)
ES (1) ES2250409T3 (fr)
WO (1) WO2001081747A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103328796A (zh) * 2011-01-31 2013-09-25 罗伯特·博世有限公司 用于确定喷射器的控制量的方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10131506A1 (de) * 2001-07-02 2003-01-23 Bosch Gmbh Robert Verfahren zum Betreiben einer Brennkraftmaschine insbesondere eines Kraftfahrzeugs
DE102006032466B3 (de) * 2006-07-13 2007-09-13 Siemens Ag Verfahren und System zur Kennlinienadaption eines Mengensteuerventils
DE102010029933B4 (de) * 2010-06-10 2020-02-06 Robert Bosch Gmbh Verfahren und Vorrichtung zum Betreiben eines Kraftstoffeinspritzsystems
SE540146C2 (en) * 2016-06-21 2018-04-10 Scania Cv Ab Method for determining the proper operation of a valve in a gas tank system
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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DE19513158A1 (de) * 1995-04-07 1996-10-10 Bosch Gmbh Robert Einrichtung zur Erkennung eines Lecks in einem Kraftstoffversorgungssystem
DE19622757B4 (de) * 1995-11-09 2007-05-10 Robert Bosch Gmbh Verfahren und Vorrichtung zur Erkennung einer Leckage in einem Kraftstoffversorgungssystem einer Brennkraftmaschine mit Hochdruckeinspritzung
DE19548280A1 (de) * 1995-12-22 1997-06-26 Bosch Gmbh Robert Verfahren und Vorrichtung zur Steuerung einer Brennkraftmaschine
DE19604552B4 (de) * 1996-02-08 2007-10-31 Robert Bosch Gmbh Verfahren und Vorrichtung zur Steuerung einer Brennkraftmaschine
DE19626689C1 (de) * 1996-07-03 1997-11-20 Bosch Gmbh Robert Verfahren und Vorrichtung zur Überwachung eines Einspritzsystems
DE19721176C2 (de) * 1997-05-21 2000-01-13 Bosch Gmbh Robert System zur Überprüfung eines Drucksensors eines Kraftstoffversorgungssystems für eine Brennkraftmaschine insbesondere eines Kraftfahrzeugs
DE19757594C2 (de) * 1997-12-23 2002-11-28 Siemens Ag Verfahren und Vorrichtung zur Funktionsüberwachung eines Druckreglers
DE19833086B4 (de) * 1998-07-23 2013-08-01 Robert Bosch Gmbh MaximalwertVerfahren und Vorrichtung zur Erkennung einer Leckage in einem Kraftstoffversorgungssystem einer Brennkraftmaschine
DE19856203C2 (de) * 1998-12-05 2001-12-06 Bosch Gmbh Robert Kraftstoffversorgungssystem für eine Brennkraftmaschine insbesondere eines Kraftfahrzeugs

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103328796A (zh) * 2011-01-31 2013-09-25 罗伯特·博世有限公司 用于确定喷射器的控制量的方法
CN103328796B (zh) * 2011-01-31 2017-02-08 罗伯特·博世有限公司 用于确定喷射器的控制量的方法

Also Published As

Publication number Publication date
ES2250409T3 (es) 2006-04-16
JP4546691B2 (ja) 2010-09-15
DE50107911D1 (de) 2005-12-08
KR20020089534A (ko) 2002-11-29
DE10020629A1 (de) 2001-11-08
WO2001081747A1 (fr) 2001-11-01
JP2003531999A (ja) 2003-10-28
EP1278950A1 (fr) 2003-01-29

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