EP1013914A1 - Krafstoffeinspritzanlage für eine Brennkraftmaschine - Google Patents

Krafstoffeinspritzanlage für eine Brennkraftmaschine Download PDF

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Publication number
EP1013914A1
EP1013914A1 EP99403253A EP99403253A EP1013914A1 EP 1013914 A1 EP1013914 A1 EP 1013914A1 EP 99403253 A EP99403253 A EP 99403253A EP 99403253 A EP99403253 A EP 99403253A EP 1013914 A1 EP1013914 A1 EP 1013914A1
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EP
European Patent Office
Prior art keywords
engine
pressure
fuel
injectors
control means
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
EP99403253A
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English (en)
French (fr)
Other versions
EP1013914B1 (de
Inventor
Henri Mazet
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.)
Marelli France SAS
Original Assignee
Magneti Marelli France SAS
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 Magneti Marelli France SAS filed Critical Magneti Marelli France SAS
Publication of EP1013914A1 publication Critical patent/EP1013914A1/de
Application granted granted Critical
Publication of EP1013914B1 publication Critical patent/EP1013914B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F02D41/04—Introducing corrections for particular operating conditions
    • F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
    • F02D41/062—Introducing corrections for particular operating conditions for engine starting or warming up for starting
    • 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 present invention relates to a circuit fuel supply for a combustion engine internal.
  • the invention applies to direct injection engines.
  • Power circuits usually encountered in internal combustion engines of motor vehicles include a high pump pressure, a rail of injectors which is supplied with fuel through the high pressure pump and means for controlling the operation of the injectors, the control means now closed the injectors during a fraction of the engine start-up phase and allowing the injectors to open when the pressure in the injector manifold has reached a threshold value predetermined, the control means comprising means which reconstitute the value of the pressure at from an operating model incorporating engine operating parameters.
  • the pressure in fuel inside the fuel system can be low due to prolonged shutdown or because it has been intentionally made weak to avoid leakage to injectors when stopped.
  • the injectors send fuel into engine cylinders under the form a regular spray pattern.
  • the injection is all the better as the fuel admitted in the injectors is high pressure.
  • the object of the present invention is to remedy the aforementioned disadvantages in providing a circuit power supply which allows to establish, from the start, a optimal fuel pressure in the injectors when operation of these.
  • a circuit of the aforementioned type is essentially characterized in that the threshold value is determined and modulated by the control means as a function of parameters engine operation such as temperature.
  • the invention further relates to a motor for motor vehicle comprising a power supply circuit fuel as defined above and a starter whose features allow the engine to be driven at a sufficient speed to reach the value of fuel threshold pressure in a time interval reduced.
  • the time interval is significantly less than or equal to one second
  • the power circuit 1 shown in Figure 1 is intended to supply fuel to a combustion engine internal of a motor vehicle.
  • This power circuit includes a high pressure injection pump 2 and a ramp 4 downstream of which are injectors 5.
  • the pump 2 is supplied with fuel from a tank (not shown) by an inlet duct 3 in the direction of arrow F.
  • Ramp 4 is supplied with high fuel pressure by an outlet pipe 6 connecting the pump 2 to the rail 4.
  • the injectors 5 spray the fuel at the inside of engine cylinders (not shown) under the jet shape 8.
  • injectors 5 are controlled by control means 7. These control means also control the high pressure pump operation 2.
  • the high pressure injection pump 2 is by example a pump whose speed of rotation is linked to that of the engine with which it is associated.
  • a starter known per se (not shown) drives the engine: the rotation speed of the pump is proportional to the speed of rotation of the engine.
  • the fuel pressure delivered by the pump is then insufficient for proper functioning of the injectors 5.
  • FIG. 2 shows that, during the engine starting phase, an operator actuates the starter at an instant t 1 , which drives the engine at a speed R d .
  • the control means 7 keep the injectors 5 closed so that the injection of fuel into these injectors is prohibited.
  • the fuel pressure delivered by this pump then increases continuously from time t 1 to time t 2 . This increase is relatively slow due to the phenomena of elasticity of the circuit and compressibility of the fuel.
  • the pressure reaches a threshold value P s . This threshold value is considered sufficient to obtain good spraying of the fuel by the injectors 5.
  • the control means 7 then authorize the opening of the injectors 5 at this instant t 2 .
  • the injectors 5 are kept closed for a fraction of the start-up phase corresponding to the start of this phase.
  • the good quality of the spray jet obtained by the present invention allows proper engine operation from the start, which reduces pollutant emissions.
  • control means 7 comprise means for measuring, such as a sensor, the fuel pressure delivered into the rail 4 as well as means for comparison making it possible to compare the measured value with the threshold value stored in the control means 7.
  • the measurement means reconstitute the pressure value from an operating model stored in the control means, this model incorporating engine operating parameters.
  • the measuring means can be associated with the sensor.
  • the threshold value at time t 2 is determined and modulated by the control means 7 as a function of other engine parameters such as, for example, the engine temperature.
  • the engine has a positive ignition, it may also be advantageous not to order ignition as long as the injectors 5 are kept closed by the control means 7.
  • the threshold pressure is generally reached in three or four engine revolutions.
  • the starter used has mechanical characteristics making it possible to obtain the instant t 2 after a very short period, typically of the order of one second. .
  • threshold pressure can still be determined either directly at the exit of high pressure pump, either at the injectors.

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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)
  • Fuel-Injection Apparatus (AREA)
EP19990403253 1998-12-24 1999-12-22 Krafstoffeinspritzanlage für eine Brennkraftmaschine Expired - Lifetime EP1013914B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9816446 1998-12-24
FR9816446A FR2787832B1 (fr) 1998-12-24 1998-12-24 Circuit d'alimentation en carburant d'un moteur a combustion interne

Publications (2)

Publication Number Publication Date
EP1013914A1 true EP1013914A1 (de) 2000-06-28
EP1013914B1 EP1013914B1 (de) 2003-07-09

Family

ID=9534510

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19990403253 Expired - Lifetime EP1013914B1 (de) 1998-12-24 1999-12-22 Krafstoffeinspritzanlage für eine Brennkraftmaschine

Country Status (4)

Country Link
EP (1) EP1013914B1 (de)
DE (1) DE69909418T2 (de)
ES (1) ES2203035T3 (de)
FR (1) FR2787832B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1321654A3 (de) * 2001-12-18 2004-04-07 Toyota Jidosha Kabushiki Kaisha Hochdruckkraftstoffversorgungssystem für Brennkraftmaschine und Steuerungsmethode dafür
EP2133540A1 (de) * 2007-03-05 2009-12-16 Yanmar Co., Ltd. Kraftstoffeinspritzsteuervorrichtung für dieselmotor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2991389A1 (fr) * 2012-06-05 2013-12-06 Peugeot Citroen Automobiles Sa Procede de commande d'un moteur a combustion interne

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3304605A1 (de) * 1982-02-12 1983-08-25 Steyr Daimler Puch Ag Kraftstoff-einspritzanlage fuer eine elektrische, ein startschloss umfassende anlasseinrichtung aufweisende kraftfahrzeug-dieselmotoren
US4487188A (en) * 1981-11-25 1984-12-11 Nissan Motor Company, Limited Fuel system for internal combustion engine
JPS61207833A (ja) * 1985-03-12 1986-09-16 Yanmar Diesel Engine Co Ltd 内燃機関の起動制御装置
JPH05302537A (ja) * 1992-04-24 1993-11-16 Nippondenso Co Ltd コモンレール式燃料噴射装置
EP0779424A2 (de) * 1995-12-15 1997-06-18 NGK Spark Plug Co. Ltd. Verfahren zur Steuerung des Anlassens einer Brennkraftmaschine und Vorrichtung zum Durchführen dieses Verfahrens
JPH09222037A (ja) * 1996-02-19 1997-08-26 Nissan Motor Co Ltd 筒内直接噴射式内燃機関の制御装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4487188A (en) * 1981-11-25 1984-12-11 Nissan Motor Company, Limited Fuel system for internal combustion engine
DE3304605A1 (de) * 1982-02-12 1983-08-25 Steyr Daimler Puch Ag Kraftstoff-einspritzanlage fuer eine elektrische, ein startschloss umfassende anlasseinrichtung aufweisende kraftfahrzeug-dieselmotoren
JPS61207833A (ja) * 1985-03-12 1986-09-16 Yanmar Diesel Engine Co Ltd 内燃機関の起動制御装置
JPH05302537A (ja) * 1992-04-24 1993-11-16 Nippondenso Co Ltd コモンレール式燃料噴射装置
EP0779424A2 (de) * 1995-12-15 1997-06-18 NGK Spark Plug Co. Ltd. Verfahren zur Steuerung des Anlassens einer Brennkraftmaschine und Vorrichtung zum Durchführen dieses Verfahrens
JPH09222037A (ja) * 1996-02-19 1997-08-26 Nissan Motor Co Ltd 筒内直接噴射式内燃機関の制御装置

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 011, no. 044 (M - 560) 10 February 1987 (1987-02-10) *
PATENT ABSTRACTS OF JAPAN vol. 018, no. 104 (M - 1563) 21 February 1994 (1994-02-21) *
PATENT ABSTRACTS OF JAPAN vol. 097, no. 012 25 December 1997 (1997-12-25) *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1321654A3 (de) * 2001-12-18 2004-04-07 Toyota Jidosha Kabushiki Kaisha Hochdruckkraftstoffversorgungssystem für Brennkraftmaschine und Steuerungsmethode dafür
US6761151B2 (en) 2001-12-18 2004-07-13 Toyota Jidosha Kabushiki Kaisha High-pressure fuel supply system of an internal combustion engine and control method thereof
EP2133540A1 (de) * 2007-03-05 2009-12-16 Yanmar Co., Ltd. Kraftstoffeinspritzsteuervorrichtung für dieselmotor
EP2133540A4 (de) * 2007-03-05 2013-08-07 Yanmar Co Ltd Kraftstoffeinspritzsteuervorrichtung für dieselmotor

Also Published As

Publication number Publication date
FR2787832A1 (fr) 2000-06-30
EP1013914B1 (de) 2003-07-09
FR2787832B1 (fr) 2001-02-23
DE69909418T2 (de) 2004-04-22
DE69909418D1 (de) 2003-08-14
ES2203035T3 (es) 2004-04-01

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