WO2007141097A1 - Procédé pour le contrôle de la fonction d'un composant d'un système d'injection de carburant - Google Patents

Procédé pour le contrôle de la fonction d'un composant d'un système d'injection de carburant Download PDF

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Publication number
WO2007141097A1
WO2007141097A1 PCT/EP2007/054334 EP2007054334W WO2007141097A1 WO 2007141097 A1 WO2007141097 A1 WO 2007141097A1 EP 2007054334 W EP2007054334 W EP 2007054334W WO 2007141097 A1 WO2007141097 A1 WO 2007141097A1
Authority
WO
WIPO (PCT)
Prior art keywords
values
injection system
fuel injection
pressure
component
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.)
Ceased
Application number
PCT/EP2007/054334
Other languages
German (de)
English (en)
Inventor
Thomas Dingler
Stefan Keller
Johannes Zeidler
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
Priority to EP07728787.8A priority Critical patent/EP2029875B1/fr
Priority to JP2009513625A priority patent/JP2009540178A/ja
Priority to CN2007800208351A priority patent/CN101466934B/zh
Publication of WO2007141097A1 publication Critical patent/WO2007141097A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1493—Details
    • F02D41/1495—Detection of abnormalities in the air/fuel ratio feedback system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • 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
    • F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
    • F02D41/26—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • F02D41/38—Controlling fuel injection of the high pressure type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • F02D41/38—Controlling fuel injection of the high pressure type
    • F02D41/3809—Common rail control systems
    • F02D41/3836—Controlling the fuel pressure
    • 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
    • F02D41/222—Safety or indicating devices for abnormal conditions relating to the failure of sensors or parameter detection devices
    • F02D2041/223—Diagnosis of fuel pressure sensors
    • 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

Definitions

  • the present invention relates to a method, a computer program and a device for checking a component of a fuel injection system contained in a motor vehicle according to the preambles of the independent claims.
  • Modern internal combustion engines are provided with a common rail fuel injection system, with which fuel is supplied by means of a pump in a common rail (pressure accumulator) and pressurized. The fuel is then injected from the common rail via controllable injectors into the combustion chambers of the internal combustion engine.
  • the common rail is provided with a rail pressure sensor with which the pressure in the common rail is measured, wherein a pressure valve and / or the pump of the fuel injection system is controlled and / or regulated in dependence on the measured pressure.
  • the above-mentioned requirements, which are made on the internal combustion engine can not be met in an inaccurate measurement of the pressure, which may be caused by a drift or defect of the rail pressure sensor, or by a malfunctioning of the other components of the fuel injection system. Therefore, for the reasons mentioned above, it is necessary to perform an accurate, non-time consuming and reliable inspection of the components of a fuel injection system contained in a motor vehicle in order to eliminate any changes and errors.
  • the injectors of the injection system are supplied with drive signals which control the fuel metering.
  • further plausibility checks of the measured values of the rail pressure sensor can be carried out over the activation duration of the injectors.
  • this is only possible in service.
  • An object of the present invention is therefore to provide a method, a computer program and a device for checking the function of at least one component of a fuel injection system contained in a vehicle, by which an identification of the component causing the error is made possible with an increased reliability of the test.
  • This problem is solved by a method for checking a component of a fuel injection system contained in a vehicle, wherein the check is carried out during operation of an internal combustion engine, and in the case of deviations from the values permissible for the component to be tested, activates a further test in a further method step is used to confirm and / or narrow down the error.
  • This solution according to the invention ensures that the testing of the component of a fuel injection system can be carried out continuously and not only when the engine is stopped or in service.
  • the method according to the invention in which two tests are carried out in succession, if the first test has an abnormality, it is further ensured that an error memory entry is only set if an error from both the first and the subsequent second Verification detected and thus confirmed.
  • a preferred embodiment of the method according to the invention provides as a first method step the determination of an amount of fuel injected into a combustion chamber of the internal combustion engine.
  • the determination may be made by direct or indirect measurement, e.g. via the opening time of an injection valve of the injector, the energization time of a piezoelectric actuator of the injector, the rail pressure or the like take place.
  • it is automatically switched, for example by a control unit, to a pressure regulation via a pressure regulating valve or a pump, whereby if the output values of the pressure regulating valve or the pump deviate from the values given values to one
  • a further preferred embodiment of the method according to the invention provides, as a first method step, for the determination and checking of a control duration of injectors contained in the fuel injection system, via which the fuel metering is controlled.
  • this is automatically canceled, e.g. switched by the controller to pressure control via a pressure control valve or a pump, wherein in case of a deviation of the output values of the pressure regulating valve or the pump of the predetermined values automatically e.g. is detected by the control unit to a malfunction of one of the rail pressure sensors.
  • the inventive method is performed constantly idling the internal combustion engine.
  • the problem mentioned at the outset is also solved by a device for checking a component of a fuel injection system contained in a vehicle, wherein the check can be carried out in the operating state of an internal combustion engine, and if deviations from the values permissible for the component to be tested, a further test in a further method step is activated to confirm the error and / or limit.
  • the input mentioned problem is further solved by a computer program with program code for carrying out the method according to the invention, when the program is executed in a computer.
  • Fig. 1 is a schematic diagram of a common rail fuel injection system
  • FIG. 2 shows a flow chart of the method according to the invention for checking a rail pressure sensor of a fuel injection system.
  • FIG. 1 is a sketch of a schematic representation of a common rail
  • the injection system has a reservoir, which is also referred to as rail 110, injectors 111, a controller 100 and a rail pressure sensor 112.
  • the rail 110 is in contact with the injector 111.
  • the rail is connected via a high-pressure line 122 to a high-pressure pump 123, which in turn is connected to a prefeed pump 124 for conveying the fuel via a filter 125 from the tank.
  • the high-pressure line 122 is also in contact via a pressure regulating valve 120 with a return line 121.
  • the high-pressure pump 123 conveys the fuel under high pressure via the high-pressure line 122 into the rail 110, which stores the high-pressure fuel.
  • the pressure regulating valve 120 is connected to a coil 115, wherein depending on the current I, which flows through the coil 115 and / or voltage applied to the coil, the pressure value is set at which the pressure regulating valve 120 releases the connection to the return line 121.
  • the coil 115 is connected via switching means 102 with a pressure control 101, which controls the switching means 102 and with output signals of a current measuring means 103 aufschlagt.
  • the pressure can also be controlled and / or regulated by influencing the high-pressure pump 123.
  • the fuel pressure in the rail 110 is detected by the rail pressure sensor 112 and supplied to the controller 100.
  • the Rail pressure sensor 112 In response to a pressure signal P, the Rail pressure sensor 112 provides, as well as the output signals from other sensors 102, the controller 100, the injector 111 with drive signals that control the fuel metering. The injector 111 then injects the fuel stored in the rail 110.
  • FIG. 2 shows one of the possible embodiments of the method according to the invention.
  • This flowchart shows a method of checking a rail pressure sensor RDS. The test is performed in steady state operation of the engine - step 101 - with the engine idling. When the engine is in the
  • the injection quantity is checked in a next step 102 and an actual value q q determined .
  • a further step 103 it is checked whether the determined actual injection quantity q is in a predetermined range, ie whether it corresponds to a desired injection quantity q ED c.
  • an engine-specific permissible bandwidth is determined, which is corrected by the generator load.
  • the potential cause of this difference may be a metering problem caused by a faulty injector or by a faulty rail pressure sensor.
  • another cause can also be a wrong implementation of the injected fuel quantity, in the event that the increased torque is caused by the engine mechanics.
  • pressure control valve step 104.
  • step 106 If the output of the pressure regulator is within the permissible range, in a step 106 all control modes are released. However, should the output of the pressure regulator, eg setpoint current or duty cycle, move within an impermissible range, there is an error in the rail pressure sensor (step 107). It is particularly advantageous that a
  • Rail pressure sensor with too large a gauge which indicates a too small pressure in the rail, leads to an increased (idling) injection quantity and at the same time to a smaller regulator output, since a smaller current is necessary for the smaller rail pressure. If the gauge pressure sensor is too small, the same applies in the reverse direction. The signals to be tested thus behave in opposite directions. Thus, the inspection of the rail pressure sensor can be performed reliably. Similarly, a check of an injector may be performed. It is also conceivable for systems without pressure control valve to combine the method with the controller output of the metering unit.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

La présente invention concerne un procédé, un programme informatique et un dispositif pour le contrôle d'un composant contenu dans un véhicule d'un système d'injection de carburant, le contrôle étant effectué à l'état de fonctionnement d'un moteur à combustion. En cas de divergences de valeurs autorisées pour les composants à tester, un autre contrôle est activé dans une autre étape de procédé pour valider et/ou délimiter est le défaut.
PCT/EP2007/054334 2006-06-08 2007-05-04 Procédé pour le contrôle de la fonction d'un composant d'un système d'injection de carburant Ceased WO2007141097A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP07728787.8A EP2029875B1 (fr) 2006-06-08 2007-05-04 Procédé pour le contrôle de la fonction d'un composant d'un système d'injection de carburant
JP2009513625A JP2009540178A (ja) 2006-06-08 2007-05-04 燃料噴射システムの各コンポーネントの機能の検査方法
CN2007800208351A CN101466934B (zh) 2006-06-08 2007-05-04 用于检查燃油喷射系统部件的功能的方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006026639.0 2006-06-08
DE102006026639A DE102006026639A1 (de) 2006-06-08 2006-06-08 Verfahren zur Überprüfung der Funktion einer Komponente eines Kraftstoffeinspritzsystems

Publications (1)

Publication Number Publication Date
WO2007141097A1 true WO2007141097A1 (fr) 2007-12-13

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/054334 Ceased WO2007141097A1 (fr) 2006-06-08 2007-05-04 Procédé pour le contrôle de la fonction d'un composant d'un système d'injection de carburant

Country Status (6)

Country Link
EP (1) EP2029875B1 (fr)
JP (1) JP2009540178A (fr)
KR (1) KR20090006874A (fr)
CN (1) CN101466934B (fr)
DE (1) DE102006026639A1 (fr)
WO (1) WO2007141097A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102422002A (zh) * 2009-04-23 2012-04-18 欧陆汽车有限责任公司 内燃机共轨中的燃油压力传感器诊断方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5387538B2 (ja) 2010-10-18 2014-01-15 株式会社デンソー 筒内噴射式内燃機関のフェールセーフ制御装置
CN111140390B (zh) * 2018-11-06 2022-12-23 长城汽车股份有限公司 车辆燃油系统的控制方法及装置
DE102019220121A1 (de) * 2019-12-19 2021-06-24 Robert Bosch Gmbh Verfahren und Vorrichtung zum Überprüfen der Funktionsfähigkeit einer Erdgas-Brennkraftmaschine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999034187A1 (fr) * 1997-12-23 1999-07-08 Siemens Aktiengesellschaft Procede et dispositif pour la surveillance du fonctionnement d'un capteur de pression
DE19908352A1 (de) * 1999-02-26 2000-08-31 Bosch Gmbh Robert Kraftstoffeinspritzverfahren für eine Brennkraftmaschine
DE10155252A1 (de) * 2001-11-09 2003-05-28 Siemens Ag Verfahren zur Plausibilitätsprüfung eines Druckwertes einer Einspritzanlage
EP1526269A2 (fr) * 2003-10-20 2005-04-27 Siemens Aktiengesellschaft Méthode et dispositif de surveillance d'un capteur de pression de carburant

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100343502C (zh) * 2005-07-25 2007-10-17 无锡油泵油嘴研究所 共轨燃油喷射系统喷油器故障诊断方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999034187A1 (fr) * 1997-12-23 1999-07-08 Siemens Aktiengesellschaft Procede et dispositif pour la surveillance du fonctionnement d'un capteur de pression
DE19908352A1 (de) * 1999-02-26 2000-08-31 Bosch Gmbh Robert Kraftstoffeinspritzverfahren für eine Brennkraftmaschine
DE10155252A1 (de) * 2001-11-09 2003-05-28 Siemens Ag Verfahren zur Plausibilitätsprüfung eines Druckwertes einer Einspritzanlage
EP1526269A2 (fr) * 2003-10-20 2005-04-27 Siemens Aktiengesellschaft Méthode et dispositif de surveillance d'un capteur de pression de carburant

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102422002A (zh) * 2009-04-23 2012-04-18 欧陆汽车有限责任公司 内燃机共轨中的燃油压力传感器诊断方法
CN102422002B (zh) * 2009-04-23 2014-06-04 大陆汽车有限公司 内燃机共轨中的燃油压力传感器诊断方法

Also Published As

Publication number Publication date
KR20090006874A (ko) 2009-01-15
EP2029875A1 (fr) 2009-03-04
DE102006026639A1 (de) 2007-12-13
CN101466934A (zh) 2009-06-24
EP2029875B1 (fr) 2018-11-07
JP2009540178A (ja) 2009-11-19
CN101466934B (zh) 2012-11-07

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