EP1856394A1 - 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

Info

Publication number
EP1856394A1
EP1856394A1 EP06708324A EP06708324A EP1856394A1 EP 1856394 A1 EP1856394 A1 EP 1856394A1 EP 06708324 A EP06708324 A EP 06708324A EP 06708324 A EP06708324 A EP 06708324A EP 1856394 A1 EP1856394 A1 EP 1856394A1
Authority
EP
European Patent Office
Prior art keywords
injection device
detected
malfunction
injection
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.)
Granted
Application number
EP06708324A
Other languages
German (de)
English (en)
Other versions
EP1856394B1 (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
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 EP1856394A1 publication Critical patent/EP1856394A1/fr
Application granted granted Critical
Publication of EP1856394B1 publication Critical patent/EP1856394B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/22—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 initially relates to a method for operating an injection device of an internal combustion engine, according to the preamble of the independent claim.
  • the invention also relates to a device and a computer program for carrying out the method according to the invention.
  • Direct fuel injection basically known.
  • injection valves are also known in which the metering of the fuel quantity to be injected into the combustion chambers of the internal combustion engine is possible not only via the opening period of the valve but also by varying the stroke of the nozzle needle of the injection valve.
  • the injection valves are typically designed as solenoid valves or piezo valves.
  • Injectors measure the mass of fuel to be injected into the cylinder, which is required for clean and efficient combustion in the engine.
  • the injection valves are typically controlled via a power output stage, the injection preferably being triggered via a so-called low-side switch of the output stage.
  • the output stage is monitored during operation so that short circuits to battery voltage and to the mass of the output stage can be detected and reacted to. It is also known to monitor software and hardware errors, for example in a control unit.
  • a method for operating an injection valve of an internal combustion engine is already known from DE 103 05 178 A1, in which soiled injection valves are recognized by monitoring proper operation of the internal combustion engine and suitable cleaning measures are initiated.
  • the pressure in a fuel accumulator and the cylinder for misfires are monitored.
  • the torque behavior is also checked and, by means of targeted enrichment and simultaneous monitoring of the lambda value, it is checked whether the injection valves are functioning properly. If contamination is detected, measures for cleaning the injection valve 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 misfire detection, so that suitable error reactions can advantageously be initiated depending on the detected malfunction.
  • This has the particular advantage that, for example in the event of an electrical fault in the injection device, cleaning attempts on an injection valve can be omitted.
  • a monitoring device of an injection device (5) of an internal combustion engine in which a detection means detects signals of misfire detection, the monitoring device recognizing at least two malfunctions of the injection device by evaluating the signals of the misfire detection, and that the monitoring device detects an error response depending on the detected malfunction initiates.
  • a further embodiment provides that when misfires of cylinders which are assigned to a final stage bank of the injection device and a drop in the fuel pressure below a threshold value, an electrical malfunction of the injection device is detected. This has the advantage that measures can be initiated in a targeted manner that are suitable for eliminating electrical errors in the injection device.
  • an output stage (45) which drives the injection valves (40) is additionally checked for electrical faults. This advantageously makes it possible to further narrow down the cause of the electrical malfunction and to initiate targeted error reactions.
  • the internal combustion engine is operated in an emergency mode.
  • FIG. 1 schematically shows an internal combustion engine with an injection device
  • FIG. 2 shows schematically an output stage circuit for two injection valves
  • FIG. 3 shows schematically a flow diagram of a method according to the invention
  • FIG. 4 shows schematically a device according to the invention.
  • the invention is based on the consideration of checking an injection device of an internal combustion engine with regard to both mechanical and electrical function and initiating error-specific error reactions or auxiliary measures in the event 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 exemplary embodiments.
  • FIG. 1 schematically shows a multi-cylinder internal combustion engine 1 with an injection device 5, four injection valves 40 and one of the cylinders being exemplary
  • the injection device 5 comprises a first and second fuel pump 10, 20, a pressure accumulator 30, injection valves 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 first fuel pump 10 is suitable for generating a low pressure.
  • the second fuel pump 10 is suitable for generating a low pressure.
  • 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.
  • One of the four injection valves 40 is shown by way of example 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 Menrere um- un ⁇ / o ⁇ er / uisiassvenuie i:> u, io ⁇ be provided, in the oereicn ⁇ er um- und ⁇ exhaust valves 150, 160 an injection valve 40 and a spark plug 200 protrude into the combustion chamber 100.
  • the injection valves 40 enable fuel to be introduced directly into the combustion chamber 100 and are controlled by the output stage 45.
  • the fuel in the combustion chamber 100 can be ignited via the spark plug 200.
  • a suction pipe 155 preferably leads air to the inlet valve 150, and by opening the inlet valve 150 the air enters the combustion chamber 110.
  • exhaust gases are preferably passed on to an exhaust pipe 165.
  • FIG. 2 shows schematically, as part of an output stage 45, a circuit of an output stage bank for two injection valves EVI, 2 as actuators, which are symbolically represented as resistors in the present example.
  • actuators which are symbolically represented as resistors in the present example.
  • capacitive or inductive actuators can also be provided, which are designed, for example, as piezo or solenoid valves.
  • Both actuators EVI, 2 are each connected to a supply line by a connection on the so-called highside via a highside switching element HSL.
  • the connection of the first actuator EVI is connected to a first lowside switching element GLS1 and the connection of the second actuator EV2 to a second lowside switching element GLS2, the two switching elements GLS1, GLS2 the two actuators
  • Figure 3 shows schematically a flow diagram of a method according to the invention.
  • a first step 510 it is checked whether misfires have been detected. Are not
  • step “no error” 700 is ended.
  • step 520 determines whether the fuel pressure p has fallen below a threshold value. If the fuel pressure is above the threshold value, it can be assumed that, despite the misfire, no injection valve is permanently open and the further check is ended in step "no error" 700. is ⁇ er acnwenenwe ⁇ unierscnnuen, we ⁇ in an ⁇ nen un ⁇ vie ⁇ en acnrn ⁇ JJU, JHU checks whether misfires only occur on one cylinder or on all cylinders of a power amplifier bank.
  • step "mechanical error" 620 If misfires only occur on one cylinder, it can be assumed that the injection valve of the respective cylinder is permanently open due to a mechanical malfunction. The system branches to step "mechanical error" 620.
  • step "electrical error" 610 If misfires can be observed on all cylinders that are assigned to a power amplifier bank, it can be assumed that the injection valves of this cylinder bank are permanently open due to an electrical malfunction. The system branches to step "electrical error" 610.
  • the invention is based on the consideration that when the injection valve 40 is permanently open, a very large amount of fuel is injected from the fuel accumulator 30 into a combustion chamber of a cylinder of the internal combustion engine. This has the following effects:
  • the fuel mass flowing through a permanently open injection valve means that the fuel pump is no longer able to keep the pressure in the pressure accumulator constant.
  • the fuel pressure in the fuel accumulator drops.
  • misfires occur due to the too large injected fuel mass in the cylinder concerned, no more combustible mixture is generated, the combustion stops, so-called misfires occur. These dropouts are recognized by a dropout detection. Misfires are therefore a necessary feature when there is a permanently open injection valve. ain ⁇ sowoni / ⁇ usse ⁇ zer ais aucn urucKaoiaii zu oeooacnien, ⁇ avon be evacuated, ⁇ ass that the injection valve is permanently open. A distinction can also be made here as to whether there is a mechanical or electrical fault in the injection device.
  • Appropriate error responses can now be initiated based on the detected malfunction. If, for example, there is a mechanical malfunction, an attempt can be made to flush the injector with fuel or to loosen it mechanically by selectively actuating the injector.
  • an electrical malfunction it can be provided, for example, to further limit the electrical error in further test steps and, if necessary, to take further precautions depending on the electrical error.
  • it can be provided to initiate coordinated emergency operation measures in the event of a detected fault, for example by changing operating modes of the internal combustion engine or adapting injection parameters.
  • the faulty one can be provided when an electrical fault is detected
  • FIG. 4 shows an exemplary 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.
  • a fuel reservoir is shown schematically
  • the injection valve 40 projects into a cylinder 110 of the internal combustion engine.
  • a fuel pressure p in the fuel accumulator 30 is detected by means of a pressure sensor 320 using a pressure sensor 320.
  • a misfire detection 310 is also connected to the cylinder 110. Signals from pressure detection 320 and misfire detection 310 are forwarded to detection means 420.
  • the monitoring device 400 evaluates the detected signals and, if necessary, initiates suitable error reactions depending on the detected malfunction.
  • pressure detection 320 and misfire detection 310 can also be part of an engine control unit.
  • pressure detection 320 and misfire detection 310 can also be part of an engine control unit.
  • other combinations are also 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)

Abstract

L'invention concerne un procédé et un dispositif pour faire fonctionner un dispositif d'injection (5) d'un moteur à combustion interne, ledit dispositif d'injection (5) présentant des soupapes d'injection (40), par l'intermédiaire desquelles le carburant est injecté directement dans les chambres de combustion (100) du moteur à combustion interne, et des organes permettant de reconnaître des irrégularités (310), ainsi que des organes permettant de déterminer une pression de carburant (320). Une défaillance mécanique d'une soupape d'injection (40) est détectée, lorsque l'irrégularité se situe sur un cylindre et entraîne une diminution de la pression de carburant dans une valeur seuil (SW). Une défaillance électrique du dispositif d'injection (5) est reconnue, lorsque les irrégularités des cylindres (110), qui sont associées à l'étage final du dispositif d'injection (5), sont constatées et que la pression de carburant est située sous une valeur seuil (SW). En fonction des défaillances reconnues, différentes réactions de défaillances sont introduites.
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 true EP1856394A1 (fr) 2007-11-21
EP1856394B1 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
GB2477997B (en) 2010-02-23 2015-01-14 Artemis Intelligent Power Ltd Fluid working machine and method for operating fluid working machine
DK2386027T3 (en) 2010-02-23 2019-04-08 Artemis Intelligent Power Ltd WORKING MACHINE WITH FLUIDUM AND PROCEDURE FOR OPERATING A WORKING MACHINE WITH FLUIDUM
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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Also Published As

Publication number Publication date
DE502006005579D1 (de) 2010-01-21
US7779678B2 (en) 2010-08-24
CN101128665A (zh) 2008-02-20
WO2006089858A1 (fr) 2006-08-31
CN101128665B (zh) 2010-05-19
DE102005008180A1 (de) 2006-08-31
ES2336698T3 (es) 2010-04-15
US20080249699A1 (en) 2008-10-09
JP2008531911A (ja) 2008-08-14
EP1856394B1 (fr) 2009-12-09

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