EP0748930B1 - Method for detecting operating failures in a fuel injection apparatus for an internal combustion engine - Google Patents

Method for detecting operating failures in a fuel injection apparatus for an internal combustion engine Download PDF

Info

Publication number
EP0748930B1
EP0748930B1 EP96106869A EP96106869A EP0748930B1 EP 0748930 B1 EP0748930 B1 EP 0748930B1 EP 96106869 A EP96106869 A EP 96106869A EP 96106869 A EP96106869 A EP 96106869A EP 0748930 B1 EP0748930 B1 EP 0748930B1
Authority
EP
European Patent Office
Prior art keywords
pressure
internal combustion
combustion engine
fuel injection
detected
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
EP96106869A
Other languages
German (de)
French (fr)
Other versions
EP0748930A2 (en
EP0748930A3 (en
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
DaimlerChrysler 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 DaimlerChrysler AG filed Critical DaimlerChrysler AG
Publication of EP0748930A2 publication Critical patent/EP0748930A2/en
Publication of EP0748930A3 publication Critical patent/EP0748930A3/en
Application granted granted Critical
Publication of EP0748930B1 publication Critical patent/EP0748930B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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 recognizing Malfunctions in a fuel injection system Internal combustion engine according to the preamble of claim 1 specified features.
  • a method is known from EP 0 501 459 A2 in which a high pressure fuel pump under high pressure in a for common supply line provided for all nozzles (Common Rail) is promoted.
  • this injection system are means for Detection of operational malfunctions used, e.g. faulty working high pressure pumps can be determined.
  • JP-A-62 13051 describes a method for identifying malfunctions known in a fuel injection system, at that between two injection processes of at least two given At any time the pressure applied is recorded and at If a pressure difference occurs the leakage is determined.
  • the determination of the pressure curve can be difficult or even be faulty 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. Moreover the pressure control in the system would have small leaks want to compensate for this by increasing the delivery capacity of the pressure pump.
  • the invention is therefore based on the object, if present small fuel volumes between pressure pumps and injectors through special measures a safe control over occurring Leakage of components in the fuel injection system to enable.
  • a fuel injection system 1 is a multi-cylinder Internal combustion engine 2 shown, which consists essentially of a Demand-controlled high-pressure pump 3 and from an injection line system 4 with one for all solenoid valve controlled Nozzles or injectors 5,6,7,8 provided common High pressure supply line 9 exists.
  • a pressure sensor designated 10 measures the actual pressure in the High pressure supply line 9. Deviations from the target pressure in the respective operating area are identified by an electronic Control unit 11 compensated by a controlled adjusting member 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 for maintaining a certain pressure level, but is also used to determine leaks in the high-pressure-side line system.
  • the pressure sensor 10 detects the respective pressure at the predetermined times t 1 and t2 (FIG. 2).
  • 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 when a certain limit value is exceeded.

Description

Die Erfindung bezieht sich auf ein Verfahren zum Erkennen von Betriebsstörungen in einer Kraftstoffeinspritzanlage einer Brennkraftmaschine nach den im Oberbegriff des Patentanspruchs 1 angegebenen Merkmalen.The invention relates to a method for recognizing Malfunctions in a fuel injection system Internal combustion engine according to the preamble of claim 1 specified features.

Aus der EP 0 501 459 A2 ist ein Verfahren bekannt, bei dem von einer Hochdruckpumpe Kraftstoff unter hohem Druck in eine für alle Düsen vorgesehenen gemeinsamen Versorgungsleitung (Common Rail) gefördert wird. Bei diesem Einspritzsystem sind Mittel zum Aufspüren von Betriebsstörungen eingesetzt, durch die z.B. fehlerhaft arbeitende Hochdruckpumpen ermittelt werden können.A method is known from EP 0 501 459 A2 in which a high pressure fuel pump under high pressure in a for common supply line provided for all nozzles (Common Rail) is promoted. In this injection system are means for Detection of operational malfunctions used, e.g. faulty working high pressure pumps can be determined.

Das hierbei aus den Komponenten, wie Düse bzw. Injektor, gemeinsame Versorgungsleitung, Rückschlagventil und Einspritzleitungen zwischen Injektor und Versorgungsleitung bestehende Einspritzsystem wird ständig mit dem hohen Speicherdruck beaufschlagt. Betriebsstörungen, die z.B. aus Undichtigkeiten dieser Komponenten resultieren, würden einen hohen Kraftstoffverlust bedeuten. Der Speicherdruck in der Versorgungsleitung kann nicht mehr aufgebaut werden. Die Folge ist eine fehlerhafte Einspritzung und damit eine Betriebsstörung des Motors, die bei nicht frühzeitigem Erkennen zum Ausfall des Gesamtsystems führen kann.The common here from the components, such as nozzle or injector Supply line, check valve and injection lines existing injection system between injector and supply line is constantly subjected to the high storage pressure. Malfunctions, e.g. from leaks in these components would result in high fuel loss. The Storage pressure in the supply line can no longer build up become. The result is a faulty injection and thus a malfunction of the engine, which occurs if the Detection can lead to failure of the overall system.

Aus der JP-A-62 13051 ist ein Verfahren zum Erkennen von Betriebsstörungen in einer Kraftstoffeinspritzanlage bekannt, bei dem zwischen zwei Einspritzvorgängen der an mindestens zwei vorgegebenen Zeitpunkten jeweils anliegende Druck erfaßt und bei Auftreten einer Druckdifferenz die Leckage festgestellt wird. JP-A-62 13051 describes a method for identifying malfunctions known in a fuel injection system, at that between two injection processes of at least two given At any time the pressure applied is recorded and at If a pressure difference occurs the leakage is determined.

Die Ermittlung des Druckverlaufs kann aber erschwert oder gar fehlerhaft sein, wenn die Kraftstoffvolumina zwischen der Druckpumpe und den Düsen bzw. Injektoren klein sind. In diesem Fall wird der Systemdruck von Reflexionswellen stark beeinflußt. Außerdem würde die Druckregelung im System kleine Undichtigkeiten durch erhöhte Förderleistung der Druckpumpe ausgleichen wollen.The determination of the pressure curve can be difficult or even be faulty 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. Moreover the pressure control in the system would have small leaks want to compensate for this by increasing the delivery capacity of the pressure pump.

Der Erfindung liegt daher die Aufgabe zugrunde, bei Vorliegen kleiner Kraftstoffvolumina zwischen Druckpumpen und Injektoren durch besondere Maßnahmen eine sichere Kontrolle über auftretende Undichtigkeiten von Komponenten in der Kraftstoffeinspritzanlage zu ermöglichen.The invention is therefore based on the object, if present small fuel volumes between pressure pumps and injectors through special measures a safe control over occurring Leakage of components in the fuel injection system to enable.

Zur Lösung der Aufgabe dienen die im Kennzeichen des Patentanspruchs 1 angegebenen Merkmale.To solve the problem serve in the characterizing part of the claim 1 specified characteristics.

In dem Unteranspruch ist noch eine förderliche Weiterbildung der Erfindung angegeben.In the subclaim is a further training of the Invention specified.

Durch die erfindungsgemäßen Verfahrensschritte gemäß Anspruch 1, nämlich in dem einen Block zwischen dem Ende einer Einspritzung und dem Förderbeginn oder in dem anderen Block zwischen dem Ende der Förderung und dem Beginn der Einspritzung den Druck mindestens zweier Zeitpunkte des jeweilig zugeordneten Blocks erst frühestens ab der zweiten Umdrehung der Kurbelwelle nach dem Übergang in den Schubbetrieb der Brennkraftmaschine zu erfassen und die ermittelte Druckdifferenz bei Überschreiten eines definierten Grenzwertes anzuzeigen, können somit auf einfache Weise kleine Undichtigkeiten aufgespürt werden.By the method steps according to the invention according to claim 1, namely in the one block between the end of an injection and the start of funding or in the other block between the end the promotion and the beginning of the injection at least the pressure two times of the respective assigned block first at the earliest from the second revolution of the crankshaft after Transition to overrun to detect the internal combustion engine and the determined pressure difference when a defined one is exceeded Limit values can be displayed easily small leaks can be detected.

Eine detaillierte Aussage über die Undichtigkeiten kann besonders dann getroffen werden, wenn die Druckerfassungen innerhalb von mehreren Umdrehungen der Kurbelwelle, insbesondere von zehn Umdrehungen, erfolgen. A detailed statement about the leaks can be special then be taken when the pressure detections are inside of several revolutions of the crankshaft, in particular ten Revolutions.

Die Erfindung wird in der Zeichnung dargestellt und im folgenden näher erläutert. Es zeigen:

Fig. 1
eine Kraftstoffeinspritzanlage mit einer Druckversorgungsleitung als gemeinsame Hochdruckversorgungsleitung für alle magnetventilgesteuerten Düsen bzw. Injektoren,
Fig. 2
in einem Diagramm den Druckverlauf bei undichtem System im Schubbetrieb, bei dem die Förderung und die Einspritzung abgeschaltet ist.
The invention is illustrated in the drawing and explained in more detail below. Show it:
Fig. 1
a fuel injection system with a pressure supply line as a common high-pressure supply line for all solenoid valve-controlled nozzles or injectors,
Fig. 2
the pressure curve in the case of a leaky system in overrun mode in which the delivery and injection are switched off in a diagram.

In Fig. 1 ist eine Kraftstoffeinspritzanlage 1 einer mehrzylindrigen Brennkraftmaschine 2 gezeigt, die im wesentlichen aus einer bedarfsgeregelten Hochdruckpumpe 3 sowie aus einem Einspritzleitungssystem 4 mit einer für alle magnetventilgesteuerten Düsen bzw. Injektoren 5,6,7,8 vorgesehenen gemeinsamen Hochdruckversorgungsleitung 9 besteht.In Fig. 1, a fuel injection system 1 is a multi-cylinder Internal combustion engine 2 shown, which consists essentially of a Demand-controlled high-pressure pump 3 and from an injection line system 4 with one for all solenoid valve controlled Nozzles or injectors 5,6,7,8 provided common High pressure supply line 9 exists.

Ein mit 10 bezeichneter Drucksensor mißt den Ist-Druck in der Hochdruckversorgungsleitung 9. Abweichungen vom Soll-Druck in dem jeweiligen Betriebsbereich werden durch eine elektronische Steuereinheit 11 ausgeglichen, indem ein angesteuertes Verstellorgan 12 an der Hochdruckpumpe 3 den vorgegebenen Druck einregelt.A pressure sensor designated 10 measures the actual pressure in the High pressure supply line 9. Deviations from the target pressure in the respective operating area are identified by an electronic Control unit 11 compensated by a controlled adjusting member 12 regulates the predetermined pressure on the high-pressure pump 3.

Der Drucksensor 10 dient nicht allein zur Regulierung des Hochdruckregelkreises für die Einhaltung eines bestimmten Druckniveaus, sondern wird auch zur Ermittlung von Undichtigkeiten im hochdruckseitigen Leitungssystem herangezogen. Der Drucksensor 10 erfaßt den jeweiligen Druck zum vorgegebenen Zeitpunkt t1 und t2 (Fig.2).The pressure sensor 10 is not only used to regulate the high-pressure control circuit for maintaining a certain pressure level, but is also used to determine leaks in the high-pressure-side line system. The pressure sensor 10 detects the respective pressure at the predetermined times t 1 and t2 (FIG. 2).

Bei störungsfreiem, also dichtem Leitungssystem ergibt sich gemäß Fig.2 ein mit durchgehender Linie dargestellter Druckverlauf. Es liegt keine nennenswerte Druckdifferenz zwischen den ermittelten Drücken bei t1 und t2. Bei undichtem System ergibt sich ein mit unterbrochener Linie dargestellter Druckverlauf bzw. Druckabfall.In the case of a fault-free, that is, dense line system, the pressure curve shown with a solid line results according to FIG. There is no significant pressure difference between the determined pressures at t 1 and t 2 . If the system is leaky, the pressure curve or pressure drop is shown with a broken line.

Für den Fall, daß im System zwischen der Hochdruckpumpe und den Injektoren kleine Undichtigkeiten auftreten, wird bei jedem Übergang vom normalen Betrieb in den Schubbetrieb - erkennbar am Signal eines Fahrpedalgebers - zusätzlich zu den in diesem Betriebszustand ohnehin abgeschalteten Injektoren auch die Hochdruckpumpe auf Nullförderung eingestellt.In the event that in the system between the high pressure pump and the Injectors will experience small leaks with everyone Transition from normal to push operation - recognizable by Signal from an accelerator pedal - in addition to those in this operating state the injectors, which were switched off anyway, also the high-pressure pump set to zero funding.

Der Zeitpunkt t1 kann nach dem Übergang in den Schubbetrieb frühestens innerhalb der zweiten Umdrehung der Kurbelwelle für die Ermittlung des Raildrucks ausgewählt werden. Die erste Umdrehung der Kurbelwelle kann dabei zur Beruhigung der Druckschwingungen im System benutzt werden. Der Raildruck wird an mehreren Zeitpunkten gemessen, z.B. innerhalb von zehn Umdrehungen der Kurbelwelle, und aus den Messungen die Druckabfallrate ermittelt, die bei Überschreiten eines bestimmten Grenzwertes als Störung angezeigt wird.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 when a certain limit value is exceeded.

Claims (2)

  1. A method of detecting operating faults in a fuel injection system, in which fuel is conveyed by a pressure pump to a pressure supply line and delivered to nozzles co-operating with cylinders of an internal combustion engine for injection,
    characterised in that
    when the internal combustion engine is in thrust mode, the nozzles (5-8) being shut down and the high-pressure pump (3) being at zero delivery, the prevailing pressure is detected at least at two respective predetermined points in time (t1; t2) and the detected pressure differential is not indicated as a fault until a defined threshold value is exceeded, and in that the times (t1; t2) at which the pressure is detected are fixed at the earliest as being with effect from the second rotation of the crankshaft following the switch to thrust mode.
  2. A method as claimed in claim 1,
    characterised in that
    the times (t1; t2) are detected at least within one rotation of the crankshaft, preferably within ten rotations.
EP96106869A 1995-06-15 1996-05-02 Method for detecting operating failures in a fuel injection apparatus for an internal combustion engine Expired - Lifetime EP0748930B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19521791 1995-06-15
DE19521791A DE19521791A1 (en) 1995-06-15 1995-06-15 Method for detecting malfunctions in a fuel injection system of an internal combustion engine

Publications (3)

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

Family

ID=7764443

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96106869A Expired - Lifetime EP0748930B1 (en) 1995-06-15 1996-05-02 Method for detecting operating failures in a fuel injection apparatus for an internal combustion engine

Country Status (3)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101644220B (en) * 2007-06-12 2012-09-19 通用汽车环球科技运作公司 Onboard fuel injector test

Families Citing this family (46)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19703891B4 (en) * 1997-02-03 2008-07-31 Robert Bosch Gmbh Method and device for detecting a leak
EP0860600B1 (en) * 1997-02-21 2003-09-17 Toyota Jidosha Kabushiki Kaisha A fuel injection system for an internal combustion engine
DE19720378C2 (en) * 1997-05-15 2002-03-14 Daimler Chrysler Ag Method for determining the opening time of an injection valve of a high-pressure accumulator injection system
DE19727794C1 (en) * 1997-06-30 1999-01-28 Siemens Ag Method of checking fuel line, esp. of common rail fuel injection systems for IC engines
DE19731102C2 (en) * 1997-07-19 2003-02-06 Bosch Gmbh Robert System for operating a fuel supply system for an internal combustion engine, in particular a motor vehicle
DE19740608C2 (en) * 1997-09-16 2003-02-13 Daimler Chrysler Ag Method for determining a fuel injection-related parameter for an internal combustion engine with high-pressure accumulator injection system
JP3709065B2 (en) * 1997-12-25 2005-10-19 株式会社日立製作所 Engine fuel supply device
JP4158272B2 (en) * 1999-03-26 2008-10-01 トヨタ自動車株式会社 Abnormality judgment method of high-pressure fuel injection system
DE10061855C2 (en) * 2000-12-12 2003-05-22 Bosch Gmbh Robert Method, computer program and control and / or regulating device for operating an internal combustion engine, and internal combustion engine
JP4184657B2 (en) * 2001-12-26 2008-11-19 セイコーインスツル株式会社 Pressure measuring device
DE10351893A1 (en) * 2003-11-06 2005-06-09 Robert Bosch Gmbh Method for operating an internal combustion engine
FI118054B (en) * 2004-04-16 2007-06-15 Waertsilae Finland Oy A method of operating a gas engine
DE102005004423B3 (en) * 2005-01-31 2006-06-14 Siemens Ag Fuel injection system`s operability monitoring method for use in internal combustion engine, involves identifying source of defect based on difference of measured temporal behavior of pressure and desired value characteristic
JP4438712B2 (en) * 2005-07-25 2010-03-24 トヨタ自動車株式会社 Control device for internal combustion engine
US7392792B2 (en) * 2006-08-21 2008-07-01 Caterpillar Inc. System for dynamically detecting fuel leakage
JP4355346B2 (en) * 2007-05-21 2009-10-28 三菱電機株式会社 Control device for internal combustion engine
GB2449706A (en) * 2007-06-01 2008-12-03 Scania Cv Ab Identifying a Malfunctioning Fuel Injector
US7650779B2 (en) * 2007-06-05 2010-01-26 Caterpillar Inc. Method and apparatus for determining correct installation for gear-driven fuel pump on a fuel injected IC engine
DE102007028900B4 (en) 2007-06-22 2013-06-27 Continental Automotive Gmbh Method and device for diagnosing an injection valve of an internal combustion engine that is in communication with a fuel rail
DE102007052451B4 (en) * 2007-11-02 2009-09-24 Continental Automotive Gmbh Method for determining the current continuous leakage quantity of a common-rail injection system and injection system for an internal combustion engine
DE102008016662A1 (en) * 2008-04-01 2009-10-15 Continental Automotive Gmbh Method for injecting fuel in vehicle engine, involves maintaining fuel pressure in high pressure storage tank, and injecting fuel into cylinder of vehicle engine by temporally controlled injector
US8332130B2 (en) * 2008-09-30 2012-12-11 Dale Arden Stretch Leak detection system
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 (en) * 2010-02-10 2011-08-25 Denso Corp Control device for fuel supply system
WO2011146894A1 (en) * 2010-05-20 2011-11-24 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 (en) * 2010-11-10 2013-09-27 Magneti Marelli Spa METHOD TO DETERMINE THE LAW OF INJECTION OF A FUEL INJECTOR
EP2453124A1 (en) * 2010-11-16 2012-05-16 Delphi Technologies Holding S.à.r.l. Method of determining injection parameters for an injector
DE102010054736A1 (en) 2010-12-16 2012-06-21 Daimler Ag Steam power plant for motor car, has device arranged in closed circuit such that device detects leakage of closed circuit in rest state of power plant, where device comprises pressure sensor and temperature sensor
DE102011075870A1 (en) * 2011-05-16 2012-11-22 Robert Bosch Gmbh Method for assessing the operability of a fuel injection system of an internal combustion engine
DE102011082459B4 (en) * 2011-09-09 2013-11-07 Continental Automotive Gmbh Method for analyzing the efficiency of the high pressure pump of a fuel injection system
JP5774521B2 (en) 2012-02-28 2015-09-09 株式会社デンソー Fuel leak detection device
DE102012203097B3 (en) * 2012-02-29 2013-04-11 Continental Automotive Gmbh Method for determining error of pressure measured by pressure sensor in pressure accumulator for storing fluid in automobile, involves determining two three-tuples of pressures and of time period
CA2794117C (en) * 2012-10-31 2013-11-12 Westport Power Inc. Method and system for detecting and diagnosing a gaseous fuel leak in a dual fuel internal combustion engine system
CN102996311B (en) * 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 Method and system for diagnosing oil return failure of electronic control common rail oil sprayer
CN103321809B (en) * 2013-07-08 2015-07-08 潍柴动力股份有限公司 Oil injector fault checking method and device
JP6381970B2 (en) * 2014-05-30 2018-08-29 日立オートモティブシステムズ株式会社 Drive device for fuel injection device
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 (en) * 2015-04-29 2017-05-11 Mtu Friedrichshafen Gmbh Method for detecting a continuous injection during operation of an internal combustion engine, injection system for an internal combustion engine and internal combustion engine
CN107120164A (en) * 2016-02-24 2017-09-01 罗伯特·博世有限公司 The method for diagnosing faults and device of the injector of vehicle SCR systems
CN110219759B (en) * 2019-08-02 2020-01-03 潍柴动力股份有限公司 Static leakage measuring method, device and system of oil sprayer
CN110657037B (en) * 2019-09-29 2021-12-17 潍柴西港新能源动力有限公司 Method for detecting leakage of gas supply system of natural gas engine
CN110714847A (en) * 2019-09-29 2020-01-21 潍柴西港新能源动力有限公司 Leakage detection method for gas supply system of natural gas engine
US11261766B1 (en) 2020-11-30 2022-03-01 Ford Global Technologies, Llc Oil dilution diagnostic test

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06213051A (en) * 1993-01-19 1994-08-02 Nippondenso Co Ltd Accumulating fuel injection system

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8403749D0 (en) * 1984-02-13 1984-03-14 Hartridge Ltd Leslie Volumetric metering equipment
DE3612808A1 (en) * 1986-04-16 1987-10-22 Bosch Gmbh Robert ARRANGEMENT FOR DETECTING THE START OF SPRAYING IN A DIESEL INTERNAL COMBUSTION ENGINE
GB8823693D0 (en) * 1988-10-08 1988-11-16 Hartopp R Injector cleaning apparatus
US5020362A (en) * 1990-06-15 1991-06-04 Hickok Electrical Instrument Company Fuel injection system tester
JP3033214B2 (en) * 1991-02-27 2000-04-17 株式会社デンソー Accumulation type fuel supply method and apparatus by a plurality of fuel pumping means, and abnormality determination apparatus in equipment having a plurality of fluid pumping means
JPH04350358A (en) * 1991-05-29 1992-12-04 Mitsubishi Electric Corp Fuel leak self-diagnostic device for electronically controlled fuel injection type internal combustion engine
JPH0699176B2 (en) * 1991-06-25 1994-12-07 東洋道路株式会社 Semi-flexible paving material
US5445019A (en) * 1993-04-19 1995-08-29 Ford Motor Company Internal combustion engine with on-board diagnostic system for detecting impaired fuel injectors
IT1261575B (en) * 1993-09-03 1996-05-23 Fiat Ricerche METHOD OF DIAGNOSIS OF MALFUNCTIONS OF THE HIGH PRESSURE CIRCUIT OF HIGH PRESSURE INJECTION SYSTEMS FOR INTERNAL COMBUSTION ENGINES
US5492099A (en) * 1995-01-06 1996-02-20 Caterpillar Inc. Cylinder fault detection using rail pressure signal

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06213051A (en) * 1993-01-19 1994-08-02 Nippondenso Co Ltd Accumulating fuel injection system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101644220B (en) * 2007-06-12 2012-09-19 通用汽车环球科技运作公司 Onboard fuel injector test

Also Published As

Publication number Publication date
EP0748930A2 (en) 1996-12-18
DE59605704D1 (en) 2000-09-14
US5708202A (en) 1998-01-13
DE19521791A1 (en) 1996-12-19
EP0748930A3 (en) 1998-01-14

Similar Documents

Publication Publication Date Title
EP0748930B1 (en) Method for detecting operating failures in a fuel injection apparatus for an internal combustion engine
EP1226355B1 (en) Method and device for the diagnosis of a fuel supply system
DE60109966T2 (en) Method for establishing the operation of the injection system with manifold for an internal combustion engine
DE69818119T2 (en) Fuel injection system for an internal combustion engine
DE19626689C1 (en) Common-rail fuel injection system monitoring method
DE19941329B4 (en) Control arrangement for an internal combustion engine with a malfunction detection function
DE19622757B4 (en) Method and device for detecting a leak in a fuel supply system of a high-pressure injection internal combustion engine
DE102010013602B4 (en) A method for detecting a malfunction of an electronically controlled fuel injection system of an internal combustion engine
DE19613184C2 (en) Method for detecting malfunctions in a fuel injection system
DE19604552B4 (en) Method and device for controlling an internal combustion engine
EP2142785B1 (en) Method and device for controlling injection in an internal combustion engine
DE19937962A1 (en) IC engine common-rail fuel injection system control method monitors valve inserted between high pressure and low pressure regions for indicating fault
WO2013034479A1 (en) Method for analyzing the efficiency of the high-pressure pump of a fuel injection system
EP0764777B1 (en) Method and apparatus for controlling an internal combustion engine
DE19620038B4 (en) Method and device for monitoring a fuel metering system
DE10061855C2 (en) Method, computer program and control and / or regulating device for operating an internal combustion engine, and internal combustion engine
DE19833086A1 (en) Method and device for detecting a leak in a fuel supply system of an internal combustion engine
DE19614884A1 (en) Control method and device for fuel-injected IC engine
DE102006053950B4 (en) Method for functional testing of a pressure detection unit of an injection system of an internal combustion engine
DE102004003316A1 (en) Pressure accumulation type fuel injection system has abnormality detector mounted on controller, to detect abnormality of detected fuel pressure in pumping
WO2021018840A1 (en) Method for monitoring a fuel supply system of an internal combustion engine and internal combustion engine for carrying out such a method
EP0644323B1 (en) Device for detecting an operation condition of an injection pump
AT515056B1 (en) Engine control unit
EP1450028A2 (en) Method and apparatus for monitoring a piezoelectric actuator
EP1325222B1 (en) Method for diagnosing a valve in a fuel supply system of an internal combustion engine

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE FR GB IT

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: DAIMLER-BENZ AKTIENGESELLSCHAFT

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE FR GB IT

17P Request for examination filed

Effective date: 19971220

17Q First examination report despatched

Effective date: 19990222

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: DAIMLERCHRYSLER AG

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

ITF It: translation for a ep patent filed

Owner name: BARZANO' E ZANARDO ROMA S.P.A.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20000822

REF Corresponds to:

Ref document number: 59605704

Country of ref document: DE

Date of ref document: 20000914

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20090527

Year of fee payment: 14

Ref country code: FR

Payment date: 20090513

Year of fee payment: 14

Ref country code: DE

Payment date: 20090525

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20090522

Year of fee payment: 14

REG Reference to a national code

Ref country code: FR

Ref legal event code: CD

Ref country code: FR

Ref legal event code: CA

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20100502

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20110131

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100502

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20101201

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100502