EP1856394B1 - Procede et dispositif pour surveiller un dispositif d'injection d'un moteur a combustion interne - Google Patents

Procede et dispositif pour surveiller un dispositif d'injection d'un moteur a combustion interne Download PDF

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Publication number
EP1856394B1
EP1856394B1 EP06708324A EP06708324A EP1856394B1 EP 1856394 B1 EP1856394 B1 EP 1856394B1 EP 06708324 A EP06708324 A EP 06708324A EP 06708324 A EP06708324 A EP 06708324A EP 1856394 B1 EP1856394 B1 EP 1856394B1
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EP
European Patent Office
Prior art keywords
injection device
malfunction
detected
electrical
internal combustion
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.)
Active
Application number
EP06708324A
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German (de)
English (en)
Other versions
EP1856394A1 (fr
Inventor
Jens Wolber
Oliver Wiemers
Winfried Langer
Andreas Baumann
Christian Koehler
Norbert Mueller
Hans-Juergen Baehr
Matthias Walz
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
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Robert Bosch GmbH
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Publication date
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Publication of EP1856394A1 publication Critical patent/EP1856394A1/fr
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    • 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
    • F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
    • F02D2200/1015—Engines misfires

Definitions

  • the invention firstly relates to a method for operating an injection device of an internal combustion engine, according to the preamble of the independent claim.
  • the invention further relates to a device and a computer program for carrying out the method according to the invention.
  • injection valves for a high-pressure as well as low-pressure fuel direct injection are basically known.
  • injector are also known in which the dosage of injected into the combustion chambers of the internal combustion engine fuel quantity is not only possible over the opening period of the valve, but also by varying the stroke of the nozzle needle of the injector.
  • the injection valves are typically designed as solenoid valves or piezo valves.
  • Injectors measure the fuel mass to be injected into the cylinder, which is needed for clean and efficient combustion in the engine.
  • the control of the injection valves is typically carried out via a power output stage, wherein the injection is preferably triggered by a so-called low-side switch of the power amplifier.
  • the power amplifier is monitored during operation so that short circuits can be detected and responded to battery voltage and ground of the power amp.
  • a method for operating an injection valve of an internal combustion engine is already known in which by monitoring a proper function of the internal combustion engine soiled injection valves are detected and suitable cleaning measures are initiated. To check the proper functioning of the pressure in a fuel tank and on the other hand, the cylinder is monitored for dropouts out. Furthermore, the torque behavior is controlled and checked by targeted enrichment and simultaneous monitoring of the lambda value, whether the injectors are working properly. When a detected contamination measures for cleaning the injector are initiated.
  • the method according to the invention for operating an injection device has the advantage that at least two malfunctions of an injection device are detected by evaluating signals of a misfire detection, so that suitable fault reactions can be initiated in an advantageous manner as a function of the detected malfunction.
  • This has the particular advantage that cleaning attempts on an injection valve can be omitted, for example, in the event of an electrical fault in the injection device.
  • a monitoring device of an injection device (5) of an internal combustion engine in which a detection means detects signals of a misfire detection, wherein the monitoring device recognizes at least two malfunctions of the injection device by evaluating the signals of the misfire detection, and in that the monitoring device has an error response as a function of the detected malfunction initiates.
  • an output stage (45) controlling the injection valves (40) is additionally checked for electrical errors. This advantageously makes it possible to further narrow down the cause of the electrical malfunction and to initiate specific fault reactions.
  • the internal combustion engine is operated in an emergency mode as a function of the malfunction as an error reaction.
  • the invention is based on the idea to check an injection device of an internal combustion engine with regard to both mechanical and electrical function and to initiate error-specific error response or auxiliary measures in the case of malfunctions of the injection device.
  • the invention is suitable for both low pressure and high pressure fuel injection systems, regardless of the embodiments in the embodiments.
  • FIG. 1 schematically a multi-cylinder internal combustion engine 1 is shown with an injection device 5, wherein four injectors 40 and one of the cylinder 110 are exemplified.
  • the injection device 5 comprises a first and second fuel pump 10, 20, a pressure accumulator 30, injectors 40, an output stage 45, a fuel tank 50 and a pressure sensor 60.
  • the first fuel pump 10 pumps fuel from a fuel tank 50 in the direction of a second fuel pump 20. Die first fuel pump 10 is adapted to generate a low pressure.
  • the second fuel pump 20 delivers the fuel into a pressure accumulator 30 and increases the low pressure provided by the first fuel pump 10 to a high pressure.
  • the pressure accumulator 30, often referred to as fuel storage, rail or common rail is in turn connected to four injection valves 40. Via a pressure sensor 60, at least the pressure in the pressure accumulator 30 is monitored.
  • one of the four injection valves 40 is shown in connection with a cylinder 110 of the internal combustion engine 1.
  • a piston 120 is movably arranged in the cylinder 110.
  • the cylinder has a combustion chamber 100, which is delimited inter alia by the piston 120, an inlet valve 150, an outlet valve 160. It can too a plurality of inlet and / or outlet valves 150, 160 may be provided.
  • Ein - and Ein - In the area of Ein - and
  • Exhaust valves 150, 160 protrude into an injection valve 40 and a spark plug 200 into the combustion chamber 100.
  • the injection valves 40 allow a direct introduction of fuel into the combustion chamber 100 and are driven by the output stage 45. About the spark plug 200, the fuel in the combustion chamber 100 can be ignited.
  • a suction pipe 155 preferably supplies air to the intake valve 150 and, by opening the intake valve 150, the air enters the combustion chamber 110. By opening the exhaust valve 160, exhaust gases are preferably directed into an exhaust pipe 165.
  • FIG. 2 schematically shows as part of an output stage 45, a circuit of a power amplifier bank for two injectors EV1, 2 as actuators, which are shown symbolically in the present example as resistors.
  • a circuit of a power amplifier bank for two injectors EV1, 2 as actuators which are shown symbolically in the present example as resistors.
  • capacitive or inductive actuators may be provided, which are designed, for example.
  • a piezo or solenoid valve As a piezo or solenoid valve.
  • Both actuators EV1,2 are each connected to a connection on the so-called highside via a high-side switching element HSL with a supply line.
  • the connection of the first actuator EV1 is connected to a first lowside switching element GLS1 and the connection of the second actuator EV2 is connected to a second lowside switching element GLS2, wherein the two switching elements GLS1, GLS2 switch the two actuators EV1,2 to a common lowside supply line.
  • FIG. 3 schematically shows a flow chart of a method according to the invention.
  • a first step 510 it is checked whether dropouts have been recognized. If no dropouts are observed, it can be assumed that no injector is permanently open and the check in step "no error" 700 is ended.
  • step 520 If dropouts have been detected, it is checked in a second step 520 whether the fuel pressure p has fallen below a threshold value. If the fuel pressure is above the threshold value, it is to be assumed that, despite the misfire, no injection valve is permanently open and the further check is terminated in the step "no error" 700.
  • the threshold value is undershot, it is checked in a third and fourth step 530, 540, whether dropouts occur only on one cylinder or on all cylinders of a power amplifier bank.
  • the invention is based on the consideration that in a permanently open injection valve 40, a very large amount of fuel from the fuel reservoir 30 is injected into a combustion chamber of a cylinder of the internal combustion engine. This then has the following effects:
  • a fuel pressure threshold may now be set that is typically less than the fuel pressure for a permanently open injector. A falling below such a threshold value is thus to be regarded as a fault feature for a permanently open injection valve.
  • it may be provided to initiate emergency measures coordinated with a detected fault, for example by changing operating modes of the internal combustion engine or adjusting injection parameters.
  • it may be provided as an emergency measure to turn off the faulty power amplifier bank in the event of a detected electrical fault.
  • emergency measures are also conceivable.
  • FIG. 4 1 shows an embodiment of a monitoring device 400 according to the invention of an injection device 5.
  • a detection means 420 is part of the device 400 according to the invention in the example shown.
  • a fuel reservoir 30 which is in connection with an injection valve 40 is shown.
  • the injection valve 40 protrudes into a cylinder 110 of the internal combustion engine.
  • a pressure sensor 320 By means of a pressure sensor 320, a fuel pressure p in the fuel reservoir 30 is detected with the aid of a pressure sensor 60.
  • a misfire detection 310 is connected to the cylinder 110. Signals of the pressure detection 320 and the misfire detection 310 are forwarded to the detection means 420.
  • the monitoring device 400 evaluates the detected signals and, if appropriate, initiates suitable error responses as a function of the detected malfunction.
  • the monitoring device 400 can also be provided to construct the monitoring device 400 according to the invention as part of an engine control unit; in particular, the pressure detection 320 and the misfire detection 310 can also be part of an engine control unit.
  • the pressure detection 320 and the misfire detection 310 can also be part of an engine control unit.
  • other combinations are conceivable.

Landscapes

  • 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)

Claims (6)

  1. Procédé pour surveiller un dispositif d'injection (5) d'un moteur à combustion interne
    dans lequel, en analysant des signaux de reconnaissance de ratés, on peut reconnaître un mauvais fonctionnement mécanique et électrique d'un dispositif d'injection,
    et une correction d'erreur peut être introduite en fonction du mauvais fonctionnement reconnu,
    caractérisé en ce que
    dans le cas où l'on reconnait un raté dans seulement un cylindre et une réduction de la pression de carburant en dessous d'une valeur seuil, on reconnait un mauvais fonctionnement mécanique du dispositif d'injection, et
    en ce que dans le cas de ratés dans tous les cylindres (110), qui sont associés à un banc d'étage de sortie du dispositif d'injection (5), et dans le cas d'une réduction de la pression de carburant en dessous d'une valeur seuil (SW), on reconnait un mauvais fonctionnement électrique du dispositif d'injection (5).
  2. Procédé selon la revendication 1, caractérisé en ce que par analyse d'une pression de carburant, on vérifie si un mauvais fonctionnement du dispositif d'injection a lieu.
  3. Procédé selon la revendication 1, caractérisé en ce que dans le cas d'une erreur électrique reconnue, on vérifie en outre la possibilité d'erreurs électriques sur un étage de sortie (45) commandant les soupapes d'injection (40).
  4. Procédé selon au moins l'une quelconque des revendications précédentes, caractérisé en ce qu'en fonction du mauvais fonctionnement, le moteur à combustion interne est commuté en tant que correction d'erreur dans un mode de fonctionnement de secours.
  5. Dispositif pour surveiller un dispositif d'injection (5) d'un moteur à combustion interne, dans lequel un moyen de détection détecte des signaux d'une reconnaissance de ratés, le dispositif de surveillance reconnaissant, par analyse de signaux de la reconnaissance de ratés, un mauvais fonctionnement mécanique et électrique d'un dispositif d'injection,
    et le dispositif de surveillance introduisant une correction d'erreur en fonction du mauvais fonctionnement reconnu,
    caractérisé en ce que
    le dispositif de surveillance, en cas de reconnaissance de ratés dans seulement un cylindre, et d'une réduction de la pression de carburant en dessous d'une valeur seuil, reconnait un mauvais fonctionnement mécanique du dispositif d'injection et
    en ce que le dispositif de surveillance, dans le cas de ratés dans tous les cylindres (110), qui sont associés à un banc d'étage de sortie du dispositif d'injection (5), et d'une réduction de la pression de carburant en dessous d'une valeur seuil (SW), reconnait un mauvais fonctionnement électrique du dispositif d'injection (5).
  6. Produit de programme informatique avec code programme, qui est stocké sur un support lisible en machine, pour mettre en oeuvre le procédé selon l'une quelconque des revendications 1 à 4, lorsque le programme est exécuté sur un ordinateur ou un appareil de commande.
EP06708324A 2005-02-23 2006-02-16 Procede et dispositif pour surveiller un dispositif d'injection d'un moteur a combustion interne Active EP1856394B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005008180A DE102005008180A1 (de) 2005-02-23 2005-02-23 Verfahren und Vorrichtung zur Überwachung einer Einspritzvorrichtung einer Brennkraftmaschine
PCT/EP2006/060032 WO2006089858A1 (fr) 2005-02-23 2006-02-16 Procede et dispositif pour surveiller un dispositif d'injection d'un moteur a combustion interne

Publications (2)

Publication Number Publication Date
EP1856394A1 EP1856394A1 (fr) 2007-11-21
EP1856394B1 true EP1856394B1 (fr) 2009-12-09

Family

ID=36143276

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06708324A Active EP1856394B1 (fr) 2005-02-23 2006-02-16 Procede et dispositif pour surveiller un dispositif d'injection d'un moteur a combustion interne

Country Status (7)

Country Link
US (1) US7779678B2 (fr)
EP (1) EP1856394B1 (fr)
JP (1) JP2008531911A (fr)
CN (1) CN101128665B (fr)
DE (2) DE102005008180A1 (fr)
ES (1) ES2336698T3 (fr)
WO (1) WO2006089858A1 (fr)

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DE102006029992A1 (de) * 2006-06-29 2008-01-03 Robert Bosch Gmbh Verfahren zur Diagnose einer elektrischen Schaltung
DE102008042605B4 (de) 2008-10-06 2019-12-05 Robert Bosch Gmbh Verfahren zum Überprüfen der Funktionstüchtigkeit mindestens eines Einspritzventils
US8229655B2 (en) * 2009-05-19 2012-07-24 GM Global Technology Operations LLC Fuel injection and combustion fault diagnostics using cylinder pressure sensor
JP5343877B2 (ja) * 2010-01-28 2013-11-13 トヨタ自動車株式会社 噴射異常検出装置
JP5346407B2 (ja) 2010-02-23 2013-11-20 アルテミス インテリジェント パワー リミティド 流体作動機および流体作動機の動作方法
GB2477997B (en) 2010-02-23 2015-01-14 Artemis Intelligent Power Ltd Fluid working machine and method for operating fluid working machine
DE102010054997B4 (de) * 2010-12-17 2012-09-13 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Verfahren zur Erkennung von irregulären Verbrennungsvorgängen bei einer Verbrennungskraftmaschine
FR2983530A1 (fr) * 2011-12-06 2013-06-07 Renault Sa Methode de diagnostic d'une derive d'au moins un injecteur d'un systeme d'injection de carburant a rampe commune.
US9243573B2 (en) * 2013-05-31 2016-01-26 Ford Global Technologies, Llc Methods and systems for cylinder bank misfire detection and reactivation
KR101469669B1 (ko) * 2013-08-29 2014-12-05 주식회사 현대케피코 복합 분사 엔진의 오감지 방지 장치 및 방법
DE102015207172A1 (de) * 2015-04-21 2016-10-27 Robert Bosch Gmbh Verfahren zum Erkennen eines Fehlers bei einer Kraftstoffzuführung einer Brennkraftmaschine
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
KR101846693B1 (ko) * 2016-08-11 2018-04-06 현대자동차주식회사 엔진의 듀얼 포트 인젝터 제어방법
DE102016219479A1 (de) * 2016-10-07 2018-04-12 Robert Bosch Gmbh Verfahren und Vorrichtung zum Ermitteln eines Schädigungszustands einer Komponente eines Fahrzeugs
DE102019212104A1 (de) * 2019-08-13 2021-02-18 Robert Bosch Gmbh Verfahren zur Steuerung einer Brennkraftmaschine

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US4841765A (en) * 1988-01-21 1989-06-27 Blanke John D Method of locating a partially plugged port fuel injector using misfire monitor
DE4118580A1 (de) 1991-06-06 1992-12-10 Bosch Gmbh Robert System zum erkennen von aussetzern in einem verbrennungsmotor
JPH0821289A (ja) 1994-07-07 1996-01-23 Toyota Motor Corp 筒内噴射式火花点火機関
DE69711250T2 (de) * 1996-01-19 2002-10-31 Fiat Ricerche Verfahren und Einheit zur Dichtigkeitsdiagnose eines Hochdruckeinspritzsystems einer Brennstoffmaschine
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JP3706335B2 (ja) * 2001-12-12 2005-10-12 本田技研工業株式会社 内燃機関の故障判定装置
DE10305178A1 (de) 2003-02-08 2004-08-19 Robert Bosch Gmbh Verfahren zum Betreiben eines Einspritzventils einer Brennkraftmaschine
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JP2005163696A (ja) * 2003-12-04 2005-06-23 Denso Corp 内燃機関の失火検出装置

Also Published As

Publication number Publication date
DE102005008180A1 (de) 2006-08-31
CN101128665B (zh) 2010-05-19
CN101128665A (zh) 2008-02-20
JP2008531911A (ja) 2008-08-14
ES2336698T3 (es) 2010-04-15
EP1856394A1 (fr) 2007-11-21
US20080249699A1 (en) 2008-10-09
US7779678B2 (en) 2010-08-24
DE502006005579D1 (de) 2010-01-21
WO2006089858A1 (fr) 2006-08-31

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