EP1826385A1 - Procédé destiné au fonctionnement d'un système d'injection d'un moteur à combustion interne - Google Patents

Procédé destiné au fonctionnement d'un système d'injection d'un moteur à combustion interne Download PDF

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Publication number
EP1826385A1
EP1826385A1 EP07100580A EP07100580A EP1826385A1 EP 1826385 A1 EP1826385 A1 EP 1826385A1 EP 07100580 A EP07100580 A EP 07100580A EP 07100580 A EP07100580 A EP 07100580A EP 1826385 A1 EP1826385 A1 EP 1826385A1
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EP
European Patent Office
Prior art keywords
combustion engine
internal combustion
accelerator pedal
speed
pressure
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
EP07100580A
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German (de)
English (en)
Other versions
EP1826385B1 (fr
Inventor
Thomas Dingler
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
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1826385A1 publication Critical patent/EP1826385A1/fr
Application granted granted Critical
Publication of EP1826385B1 publication Critical patent/EP1826385B1/fr
Expired - Fee Related legal-status Critical Current
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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
    • F02D41/222—Safety or indicating devices for abnormal conditions relating to the failure of sensors or parameter detection devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D31/00—Use of speed-sensing governors to control combustion engines, not otherwise provided for
    • F02D31/001—Electric control of rotation speed
    • F02D31/007—Electric control of rotation speed controlling fuel supply
    • 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
    • F02D41/1497—With detection of the mechanical response of the engine
    • 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
    • F02D41/3845—Controlling the fuel pressure by controlling the flow into the common rail, e.g. the amount of fuel pumped
    • 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
    • F02D2041/227—Limping Home, i.e. taking specific engine control measures at abnormal conditions
    • 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
    • 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
    • F02D2200/0604—Estimation of fuel pressure

Definitions

  • the invention relates to a method for operating an injection system of an internal combustion engine according to the preamble of claim 1.
  • a method and a device with a fuel metering system in which the fuel is conveyed by means of a pump in a memory, for example, from EP 0 976 921 B1 known. From the memory, the fuel passes through controllable injectors into the combustion chambers of the internal combustion engine. A sensor provides a pressure signal that characterizes the pressure in the memory. The pressure in the reservoir is taken into account when controlling the injectors. Accurate metering of fuel is only possible if accurate values of pressure in the reservoir are known. In common rail systems, the pressure is in the range between a few 100 bar to about 2000 bar. Within this range, the pressure sensor must reliably provide a signal. A failure of the pressure sensor or a faulty signal of the pressure sensor lead to an inaccurate fuel metering. In internal combustion engines in which a pressure control with a pressure control valve is not possible, the internal combustion engine is switched off in this case.
  • the object of the invention is to develop a generic method for operating an injection system of an internal combustion engine to the effect that even in systems where a pressure control with a pressure control valve is not possible, in the event of failure of the pressure sensor emergency operation of the vehicle is possible, so as to achieve a safe parking or a service operation.
  • the basic idea of the invention is to provide a replacement control loop which, in the event of a failure of the pressure sensor, permits limited emergency operation of the vehicle.
  • This is achieved according to the invention in that, in the event of a failure of the pressure sensor, the control duration of the injectors and the setpoint speed are kept constant as a function of the operating point. In this way, the amount injected by injectors depends solely on the pressure in the pressure accumulator, the so-called rail. If the speed increases, the pressure is too high. If the speed drops, the pressure is too low.
  • the control deviation of the speed is now used as input for the pressure regulator and the speed of the internal combustion engine is controlled by a manipulated variable of the metering unit to a constant value. Due to this closed control loop, an excessive rail pressure leads to an increased speed and thus in the rail pressure regulator to close the metering unit. This results in a reduced pump delivery. This in turn results in a reduced rail pressure, resulting in a reduced injection quantity and thus in turn a lower speed. By contrast, too small a rail pressure leads to a decrease in the speed and thus to the opening of the metering unit. This leads to an increased pump delivery, resulting in an increased rail pressure, which in turn results in an increased injection quantity and this in turn leads to a higher speed. By means of these measures, the rail pressure can be maintained in a range permissible for the system and an emergency running program can be realized with the constant speed.
  • Another advantageous embodiment of the method in which an increased quantity requirement is detected, for example, during start-up, provides that the activation duration is switched to a greater value as a function of signals indicating the position of a clutch and / or a transmission and / or the speed of the vehicle and / or the position of the accelerator pedal.
  • the activation duration is preferably changed in stages, specifically as a function of the accelerator pedal position. There are preferably three stages provided, i. it only reacts to big changes of the gas pedal. In a first stage, the activation duration is extended if an accelerator operation characterizing an acceleration process of the vehicle is present. In a second stage, the driving time is not changed when there is an accelerator pedal position characterizing a constant speed of the vehicle. And in a third position, the drive duration is reduced at a throttle speed characterizing accelerator pedal position.
  • a rapid adaptation of the metering unit may be provided, for example, upon detection of critical operating points, e.g. the clutch pedal is pressed. In this case, an increased fuel delivery amount from the metering unit - e.g. to start - to be set.
  • FIG. 1 a block diagram of an injection system of an internal combustion engine for explaining the method according to the invention is shown schematically.
  • an embodiment of an injection system of an internal combustion engine 310 is shown schematically.
  • the internal combustion engine 310 has controllable injectors 321, 322, 323, 324, by means of which fuel is injected into the combustion chambers 331, 332, 333, 334 of the internal combustion engine 310.
  • the fuel is injected under high pressure into the combustion chambers 331, 332, 333, 334.
  • a memory 300 is provided, a so-called rail, in which the fuel is stored under high pressure. All injectors 321, 322, 323, 324 are powered by this memory 300.
  • the pressure in the reservoir 300 is generated by a feed pump 210 whose feed is controlled by a metering unit 200.
  • a pressure sensor 305 is arranged, the output signal of which is supplied to a rail pressure regulator 110, which is part of a control unit 400.
  • the rail pressure controller 110 determines a manipulated variable 120 of the metering unit 200, which is determined as a function of a rail pressure control deviation.
  • the rail pressure regulator 110 is supplied with a selection of input variables, for example a signal characterizing the gas pedal travel, a signal characterizing the clutch position, a signal characterizing the engaged gear of a transmission, as in FIG the figure schematically indicated by a block 130.
  • the drive duration of the injectors 321, 322, 323, 324 is also calculated.
  • the rotational speed of the internal combustion engine is regulated by a manipulated variable of the metering unit 200 to a constant value in the manner described below.
  • a target speed 150 is specified depending on the accelerator pedal position.
  • the desired speed 150 is subtracted from the currently prevailing speed 140 in a computing element 160 that is part of the controller 400. In the rail pressure controller 110, this difference (control deviation) is now regulated to the value 0, so that the current speed 140 corresponds to the setpoint speed 150.
  • one or more constant values are stored in the control unit, which values are predefined as a function of the operating state.
  • the current speed 140 is therefore kept constant only by a change in the pressure in the rail 300, which is changed by the position of the metering unit 200.
  • a longer actuation duration is predetermined.
  • an operating state which can be concluded with an unchanged accelerator pedal position on an unchanged speed of the vehicle.
  • the driving time is maintained.
  • an operating state of the motor vehicle which is indicative of a reduction in the speed, that is, when the accelerator pedal is operated so that the accelerator pedal travel is reduced - ie "gas taken away" -, the driving time is reduced by the metering unit 200.
  • a change in the activation duration can also be carried out as a function of the clutch pedal travel or of the transmission information as well as directly on the driving speed. For example, when the vehicle speed is increased or the transmission ratio is changed to a longer driving time, e.g. be switched by means of a ramp.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
EP20070100580 2006-02-28 2007-01-16 Procédé destiné au fonctionnement d'un système d'injection d'un moteur à combustion interne Expired - Fee Related EP1826385B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200610009068 DE102006009068A1 (de) 2006-02-28 2006-02-28 Verfahren zum Betreiben eines Einspritzsystems einer Brennkraftmaschine

Publications (2)

Publication Number Publication Date
EP1826385A1 true EP1826385A1 (fr) 2007-08-29
EP1826385B1 EP1826385B1 (fr) 2009-08-12

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EP20070100580 Expired - Fee Related EP1826385B1 (fr) 2006-02-28 2007-01-16 Procédé destiné au fonctionnement d'un système d'injection d'un moteur à combustion interne

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EP (1) EP1826385B1 (fr)
DE (2) DE102006009068A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009132897A1 (fr) * 2008-04-30 2009-11-05 Continental Automotive Gmbh Procédé de détermination de la pression de rampe dans un système à rampe distributrice et un système d'injection à pression modulée
WO2010012545A1 (fr) * 2008-08-01 2010-02-04 Continental Automotive Gmbh Procédé et dispositif servant à réguler la pression de carburant dans l'accumulateur de pression d'un système d'injection common rail
WO2010121891A1 (fr) * 2009-04-23 2010-10-28 Continental Automotive Gmbh Procédé de diagnostic d'un capteur de pression de carburant dans la rampe commune d'un moteur à combustion interne
CN102667121A (zh) * 2009-10-23 2012-09-12 Mtu腓特烈港有限责任公司 用于控制和调节内燃机的方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008022590B3 (de) * 2008-05-07 2009-11-12 Continental Automotive Gmbh Notlaufbetrieb-Verfahren für eine Brennkraftmaschine
DE102009050468B4 (de) 2009-10-23 2017-03-16 Mtu Friedrichshafen Gmbh Verfahren zur Steuerung und Regelung einer Brennkraftmaschine
DE102016212671B4 (de) * 2016-07-12 2018-05-30 Continental Automotive Gmbh Ansteuerverfahren zum Ansteuern eines Einlassventils einer Kraftstoffhochdruckpumpe und Kraftstoffeinspritzsystem

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6024064A (en) * 1996-08-09 2000-02-15 Denso Corporation High pressure fuel injection system for internal combustion engine
WO2001073282A1 (fr) * 2000-03-24 2001-10-04 Robert Bosch Gmbh Procede de determination de la pression de rampe d'une soupape d'injection comprenant un actionneur piezo-electrique
WO2003040548A1 (fr) * 2001-11-09 2003-05-15 Siemens Aktiengesellschaft Systeme d'injection dote d'une fonction d'urgence et procede d'urgence associe
WO2003046357A1 (fr) * 2001-11-24 2003-06-05 Mtu Friedrichshafen Gmbh Procede de commande d'un moteur a combustion interne
US20050263146A1 (en) * 2004-05-28 2005-12-01 Mitsubishi Denki Kabushiki Kaisha Fuel pressure control device for internal combustion engine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6024064A (en) * 1996-08-09 2000-02-15 Denso Corporation High pressure fuel injection system for internal combustion engine
WO2001073282A1 (fr) * 2000-03-24 2001-10-04 Robert Bosch Gmbh Procede de determination de la pression de rampe d'une soupape d'injection comprenant un actionneur piezo-electrique
WO2003040548A1 (fr) * 2001-11-09 2003-05-15 Siemens Aktiengesellschaft Systeme d'injection dote d'une fonction d'urgence et procede d'urgence associe
WO2003046357A1 (fr) * 2001-11-24 2003-06-05 Mtu Friedrichshafen Gmbh Procede de commande d'un moteur a combustion interne
US20050263146A1 (en) * 2004-05-28 2005-12-01 Mitsubishi Denki Kabushiki Kaisha Fuel pressure control device for internal combustion engine

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009132897A1 (fr) * 2008-04-30 2009-11-05 Continental Automotive Gmbh Procédé de détermination de la pression de rampe dans un système à rampe distributrice et un système d'injection à pression modulée
US8528523B2 (en) 2008-04-30 2013-09-10 Continental Automotive Gmbh Method for determining the rail pressure in a common rail system, and common rail injection system
WO2010012545A1 (fr) * 2008-08-01 2010-02-04 Continental Automotive Gmbh Procédé et dispositif servant à réguler la pression de carburant dans l'accumulateur de pression d'un système d'injection common rail
CN102112722A (zh) * 2008-08-01 2011-06-29 欧陆汽车有限责任公司 调节共轨喷射***的蓄压器中的燃料压力的方法和装置
CN102112722B (zh) * 2008-08-01 2015-07-29 大陆汽车有限公司 调节共轨喷射***的蓄压器中的燃料压力的方法和装置
WO2010121891A1 (fr) * 2009-04-23 2010-10-28 Continental Automotive Gmbh Procédé de diagnostic d'un capteur de pression de carburant dans la rampe commune d'un moteur à combustion interne
US8950380B2 (en) 2009-04-23 2015-02-10 Continental Automotive Gmbh Diagnostic method for a fuel pressure sensor in the common rail of an internal combustion engine
CN102667121A (zh) * 2009-10-23 2012-09-12 Mtu腓特烈港有限责任公司 用于控制和调节内燃机的方法
CN102667121B (zh) * 2009-10-23 2016-01-20 Mtu腓特烈港有限责任公司 用于控制和调节内燃机的方法
US9328689B2 (en) 2009-10-23 2016-05-03 Mtu Friedrichshafen Gmbh Method for the open-loop control and closed-loop control of an internal combustion engine

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Publication number Publication date
DE502007001265D1 (de) 2009-09-24
EP1826385B1 (fr) 2009-08-12
DE102006009068A1 (de) 2007-08-30

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