EP0748930A2 - Méthode de détection de fautes de fonctionnement d'un dispositif d'injection de carburant pour moteur à combustion - Google Patents

Méthode de détection de fautes de fonctionnement d'un dispositif d'injection de carburant pour moteur à combustion Download PDF

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Publication number
EP0748930A2
EP0748930A2 EP96106869A EP96106869A EP0748930A2 EP 0748930 A2 EP0748930 A2 EP 0748930A2 EP 96106869 A EP96106869 A EP 96106869A EP 96106869 A EP96106869 A EP 96106869A EP 0748930 A2 EP0748930 A2 EP 0748930A2
Authority
EP
European Patent Office
Prior art keywords
pressure
injection
internal combustion
combustion engine
delivery
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
EP96106869A
Other languages
German (de)
English (en)
Other versions
EP0748930A3 (fr
EP0748930B1 (fr
Inventor
Ulrich Dr. Augustin
Volker Schwarz
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.)
Mercedes Benz Group AG
Original Assignee
Daimler Benz AG
Mercedes Benz AG
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 Daimler Benz AG, Mercedes Benz AG filed Critical Daimler Benz AG
Publication of EP0748930A2 publication Critical patent/EP0748930A2/fr
Publication of EP0748930A3 publication Critical patent/EP0748930A3/fr
Application granted granted Critical
Publication of EP0748930B1 publication Critical patent/EP0748930B1/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
    • F02D41/22—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
    • F02D41/30—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
    • F02D41/22—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
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • F02D2041/224—Diagnosis of the fuel system
    • F02D2041/225—Leakage detection
    • 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
    • F02D2250/00—Engine control related to specific problems or objectives
    • F02D2250/31—Control of the fuel pressure

Definitions

  • the invention relates to a method for identifying malfunctions in a fuel injection system of an internal combustion engine according to the features specified in the preamble of claim 1.
  • EP 0 501 459 A2 discloses a method in which fuel is pumped under high pressure into a common supply line (common rail) provided for all nozzles by a high-pressure pump.
  • This injection system uses means to detect malfunctions, e.g. faulty high-pressure pumps can be determined.
  • the injection system consisting of the components, such as nozzle or injector, common supply line, check valve and injection lines between injector and supply line, is constantly subjected to the high storage pressure. Malfunctions, e.g. leakage from these components would result in high fuel loss. The storage pressure in the supply line can no longer be built up. The result is faulty injection and thus an engine malfunction, which can lead to failure of the overall system if it is not recognized early.
  • the invention is therefore based on the object of making it possible, by means of special measures, to reliably control the leakage of components in the fuel injection system.
  • the pressure of at least two points in time of the respectively assigned block is to be detected and the pressure determined Large leaks can be easily determined by displaying the pressure difference only when a defined limit value is exceeded.
  • the detection of large leaks is particularly useful in an injection system as a common rail system.
  • the pressure in the high-pressure accumulator or in the common supply line intended for all solenoid valve-controlled nozzles is constantly changed by the various processes, such as delivery and injection, in normal, that is, trouble-free operation.
  • Each injection leads to a usual rapid drop in pressure, which, however, is compensated for in the subsequent delivery of the high-pressure pump.
  • An additional pressure drop as a result of a leak is thus recognized by the special process steps and displayed.
  • the determination of the pressure curve can, however, be made more difficult if the fuel volumes between the pressure pump and the nozzles or injectors are small. In this case, the system pressure is strongly influenced by reflection waves.
  • Leakages that occur can be detected in a simple manner by the method steps according to the invention.
  • a fuel injection system 1 of a multi-cylinder internal combustion engine 2 which essentially consists of a demand-controlled high-pressure pump 3 and an injection line system 4 with a common high-pressure supply line 9 provided for all solenoid valve-controlled nozzles or injectors 5, 6, 7, 8.
  • a pressure sensor denoted by 10 measures the actual pressure in the high-pressure supply line 9. Deviations from the target pressure in the respective operating range are compensated for by an electronic control unit 11 in that a controlled adjusting element 12 regulates the predetermined pressure on the high-pressure pump 3.
  • the pressure sensor 10 is not only used to regulate the high-pressure control circuit in order to maintain a certain pressure level, but is also used to determine leaks in the high-pressure-side line system, which is discussed in more detail below.
  • the pressure sensor 10 detects the respective pressure at the predetermined time t 1 and t 2 . Both times are chosen between the end of injection E E and the start of delivery F B. With trouble-free, that is, a dense line system results in a pressure curve shown with a solid line in FIG. 3. There is no significant pressure difference between the determined pressures at t 1 and t 2 and possibly t 3 .
  • this status is displayed as a fault.
  • This method which can be used to detect large leaks, is particularly suitable for piping systems with large fuel volumes between the high pressure pump and the injectors.
  • a method is provided in which, during normal operation of the internal combustion engine, at least one delivery and at least one injection are forcedly switched off at irregular intervals.
  • the rail pressure curve for an intact system and for a leaky system is similar to that according to FIG. 3.
  • the time t 1 can be selected after the transition to overrun at the earliest within the second revolution of the crankshaft for determining the rail pressure.
  • the first revolution of the crankshaft can be used to calm the pressure fluctuations in the system.
  • the rail pressure is measured at several points in time, for example within ten revolutions of the crankshaft, and the pressure drop rate is determined from the measurements, which is displayed as a fault if a certain limit value is exceeded.
  • the times for pressure detection can also be selected at a higher pressure level, namely between the end of delivery F E and the start of injection E B.
  • the times are denoted by t 1 'and t 2 ' and shown as an example in FIG.
  • the determination of the times t 1 'and t 2 ' applies equally to the other versions.

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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)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Fuel-Injection Apparatus (AREA)
EP96106869A 1995-06-15 1996-05-02 Méthode de détection de fautes de fonctionnement d'un dispositif d'injection de carburant pour moteur à combustion Expired - Lifetime EP0748930B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19521791A DE19521791A1 (de) 1995-06-15 1995-06-15 Verfahren zum Erkennen von Betriebsstörungen in einer Kraftstoffeinspritzanlage einer Brennkraftmaschine
DE19521791 1995-06-15

Publications (3)

Publication Number Publication Date
EP0748930A2 true EP0748930A2 (fr) 1996-12-18
EP0748930A3 EP0748930A3 (fr) 1998-01-14
EP0748930B1 EP0748930B1 (fr) 2000-08-09

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP96106869A Expired - Lifetime EP0748930B1 (fr) 1995-06-15 1996-05-02 Méthode de détection de fautes de fonctionnement d'un dispositif d'injection de carburant pour moteur à combustion

Country Status (3)

Country Link
US (1) US5708202A (fr)
EP (1) EP0748930B1 (fr)
DE (2) DE19521791A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0857867A1 (fr) * 1997-02-03 1998-08-12 Robert Bosch Gmbh Méthode et dispositif de détection de fuite
FR2766237A1 (fr) * 1997-07-19 1999-01-22 Bosch Gmbh Robert Systeme d'alimentation en carburant d'un moteur a combustion interne equipant notamment un vehicule automobile
EP0860600A3 (fr) * 1997-02-21 2000-03-29 Toyota Jidosha Kabushiki Kaisha Système d'injection de combustible pour moteur à combustion interne
EP0907015A3 (fr) * 1997-09-16 2002-02-06 DaimlerChrysler AG Procédé pour déterminer des grandeurs correspondant à l'injection dans un moteur à combustion interne dans un système d'injection avec rampe à carburant commune.
WO2009000647A2 (fr) * 2007-06-22 2008-12-31 Continental Automotive Gmbh Procédé et dispositif de diagnostic d'une soupape d'injection d'un moteur à combustion interne reliée à une ligne de répartition de carburant
WO2010038126A1 (fr) * 2008-09-30 2010-04-08 Eaton Corporation Système de détection de fuite
WO2012066044A1 (fr) * 2010-11-16 2012-05-24 Delphi Technologies Holding S.À.R.L. Procédé de détermination de paramètres d'injection pour un injecteur
WO2012156185A3 (fr) * 2011-05-16 2013-03-14 Robert Bosch Gmbh Procédé d'évaluation de la capacité de fonctionnement d'un système d'injection de carburant d'un moteur à combustion interne

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DE19720378C2 (de) * 1997-05-15 2002-03-14 Daimler Chrysler Ag Verfahren zur Bestimmung der Öffnungszeit eines Einspritzventiles einer Hochdruckspeicher-Einspritzanlage
DE19727794C1 (de) * 1997-06-30 1999-01-28 Siemens Ag Verfahren zum Überprüfen einer Kraftstoffversorgung
JP3709065B2 (ja) * 1997-12-25 2005-10-19 株式会社日立製作所 エンジン燃料供給装置
JP4158272B2 (ja) * 1999-03-26 2008-10-01 トヨタ自動車株式会社 高圧燃料噴射系の異常判定方法
DE10061855C2 (de) * 2000-12-12 2003-05-22 Bosch Gmbh Robert Verfahren, Computerprogramm und Steuer- und/oder Regelgerät zum Betreiben einer Brennkraftmaschine, sowie Brennkraftmaschine
JP4184657B2 (ja) * 2001-12-26 2008-11-19 セイコーインスツル株式会社 圧力測定装置
DE10351893A1 (de) * 2003-11-06 2005-06-09 Robert Bosch Gmbh Verfahren zum Betreiben einer Brennkraftmaschine
FI118054B (fi) * 2004-04-16 2007-06-15 Waertsilae Finland Oy Menetelmä kaasumoottorin käyttämiseksi
DE102005004423B3 (de) * 2005-01-31 2006-06-14 Siemens Ag Verfahren zum Überwachen der Funktionsfähigkeit eines Kraftstoffeinspritzsystems
JP4438712B2 (ja) * 2005-07-25 2010-03-24 トヨタ自動車株式会社 内燃機関の制御装置
US7392792B2 (en) 2006-08-21 2008-07-01 Caterpillar Inc. System for dynamically detecting fuel leakage
JP4355346B2 (ja) * 2007-05-21 2009-10-28 三菱電機株式会社 内燃機関の制御装置
GB2449706A (en) * 2007-06-01 2008-12-03 Scania Cv Ab Identifying a Malfunctioning Fuel Injector
US7650778B2 (en) * 2007-06-05 2010-01-26 Caterpillar Inc. Method and apparatus for testing a gear-driven fuel pump on a fuel injected IC engine
US7543485B2 (en) * 2007-06-12 2009-06-09 Gm Global Technology Operations, Inc. Onboard fuel injector test
DE102007052451B4 (de) * 2007-11-02 2009-09-24 Continental Automotive Gmbh Verfahren zum Bestimmen der aktuellen Dauerleckagemenge einer Common-Rail-Einspritzanlage und Einspritzanlage für eine Brennkraftmaschine
DE102008016662A1 (de) * 2008-04-01 2009-10-15 Continental Automotive Gmbh Verfahren und Einrichtung zum Einspritzen von Kraftstoff in einen Kraftfahrzeugmotor
US7980120B2 (en) * 2008-12-12 2011-07-19 GM Global Technology Operations LLC Fuel injector diagnostic system and method for direct injection engine
US7938101B2 (en) * 2009-02-11 2011-05-10 GM Global Technology Operations LLC Adaptive control of fuel delivery in direct injection engines
JP2011163220A (ja) * 2010-02-10 2011-08-25 Denso Corp 燃料供給システムの制御装置
US8554454B2 (en) * 2010-05-20 2013-10-08 Cummins Inc. Service bay high pressure common rail injector performance test
US8511275B2 (en) 2010-10-01 2013-08-20 General Electric Company Method and system for a common rail fuel system
IT1402820B1 (it) * 2010-11-10 2013-09-27 Magneti Marelli Spa Metodo per determinare la legge di iniezione di un iniettore di carburante
DE102010054736A1 (de) 2010-12-16 2012-06-21 Daimler Ag Dampfkraftanlage für ein Kraftfahrzeug
DE102011082459B4 (de) 2011-09-09 2013-11-07 Continental Automotive Gmbh Verfahren zur Analyse des Wirkungsgrades der Hochdruckpumpe eines Kraftstoffeinspritzsystems
JP5774521B2 (ja) 2012-02-28 2015-09-09 株式会社デンソー 燃料漏れ検出装置
DE102012203097B3 (de) * 2012-02-29 2013-04-11 Continental Automotive Gmbh Verfahren und Vorrichtung zum Bestimmen eines Fehlers einer Druckmessung in einem Druckbehälter
CA2794117C (fr) * 2012-10-31 2013-11-12 Westport Power Inc. Methode et systeme de detection et de diagnostic de fuite de carburant gazeux dans un systeme de moteur a combustion interne bimode
CN102996311B (zh) * 2012-12-04 2014-09-24 中国第一汽车股份有限公司无锡油泵油嘴研究所 电控共轨喷油器回油故障诊断方法及系统
CN103321809B (zh) * 2013-07-08 2015-07-08 潍柴动力股份有限公司 喷油器故障检查方法及装置
JP6381970B2 (ja) * 2014-05-30 2018-08-29 日立オートモティブシステムズ株式会社 燃料噴射装置の駆動装置
US9657653B2 (en) 2014-06-09 2017-05-23 Caterpillar Inc. Gas pressure high and low detection
US9663096B2 (en) 2015-02-20 2017-05-30 Ford Global Technologies, Llc Methods and systems for mitigating fuel injector leak
DE102015207961B4 (de) * 2015-04-29 2017-05-11 Mtu Friedrichshafen Gmbh Verfahren zum Erkennen einer Dauereinspritzung im Betrieb einer Brennkraftmaschine, Einspritzsystem für eine Brennkraftmaschine und Brennkraftmaschine
CN107120164A (zh) * 2016-02-24 2017-09-01 罗伯特·博世有限公司 车辆scr系统的喷射器的故障诊断方法和装置
CN110219759B (zh) * 2019-08-02 2020-01-03 潍柴动力股份有限公司 一种喷油器的静态泄漏测量方法、装置及系统
CN110714847A (zh) * 2019-09-29 2020-01-21 潍柴西港新能源动力有限公司 一种天然气发动机供气系统的泄漏检测方法
CN110657037B (zh) * 2019-09-29 2021-12-17 潍柴西港新能源动力有限公司 检测天然气发动机供气系统泄漏的方法
US11261766B1 (en) 2020-11-30 2022-03-01 Ford Global Technologies, Llc Oil dilution diagnostic test

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EP0501459A2 (fr) * 1991-02-27 1992-09-02 Nippondenso Co., Ltd. Système d'injection avec rampe à carburant commune et méthode à cet effet
JPH06213051A (ja) * 1993-01-19 1994-08-02 Nippondenso Co Ltd 蓄圧式燃料噴射装置
WO1995006814A1 (fr) * 1993-09-03 1995-03-09 Robert Bosch Gmbh Methode de diagnostic de defaillances d'un circuit a haute pression d'un systeme d'injection a haute pression d'un moteur a combustion interne

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0857867A1 (fr) * 1997-02-03 1998-08-12 Robert Bosch Gmbh Méthode et dispositif de détection de fuite
EP0860600A3 (fr) * 1997-02-21 2000-03-29 Toyota Jidosha Kabushiki Kaisha Système d'injection de combustible pour moteur à combustion interne
FR2766237A1 (fr) * 1997-07-19 1999-01-22 Bosch Gmbh Robert Systeme d'alimentation en carburant d'un moteur a combustion interne equipant notamment un vehicule automobile
EP0907015A3 (fr) * 1997-09-16 2002-02-06 DaimlerChrysler AG Procédé pour déterminer des grandeurs correspondant à l'injection dans un moteur à combustion interne dans un système d'injection avec rampe à carburant commune.
WO2009000647A2 (fr) * 2007-06-22 2008-12-31 Continental Automotive Gmbh Procédé et dispositif de diagnostic d'une soupape d'injection d'un moteur à combustion interne reliée à une ligne de répartition de carburant
WO2009000647A3 (fr) * 2007-06-22 2009-02-19 Continental Automotive Gmbh Procédé et dispositif de diagnostic d'une soupape d'injection d'un moteur à combustion interne reliée à une ligne de répartition de carburant
US8333109B2 (en) 2007-06-22 2012-12-18 Continental Automotive Gmbh Method and device for diagnosing an injection valve, connected to a fuel rail, of an internal combustion engine
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
WO2010038126A1 (fr) * 2008-09-30 2010-04-08 Eaton Corporation Système de détection de fuite
JP2012504206A (ja) * 2008-09-30 2012-02-16 イートン コーポレーション リーク検出システム
WO2012066044A1 (fr) * 2010-11-16 2012-05-24 Delphi Technologies Holding S.À.R.L. Procédé de détermination de paramètres d'injection pour un injecteur
WO2012156185A3 (fr) * 2011-05-16 2013-03-14 Robert Bosch Gmbh Procédé d'évaluation de la capacité de fonctionnement d'un système d'injection de carburant d'un moteur à combustion interne

Also Published As

Publication number Publication date
EP0748930A3 (fr) 1998-01-14
US5708202A (en) 1998-01-13
DE19521791A1 (de) 1996-12-19
EP0748930B1 (fr) 2000-08-09
DE59605704D1 (de) 2000-09-14

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