EP0644324B1 - Procédé pour doser le carburant pour moteurs diesel - Google Patents

Procédé pour doser le carburant pour moteurs diesel Download PDF

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Publication number
EP0644324B1
EP0644324B1 EP94109088A EP94109088A EP0644324B1 EP 0644324 B1 EP0644324 B1 EP 0644324B1 EP 94109088 A EP94109088 A EP 94109088A EP 94109088 A EP94109088 A EP 94109088A EP 0644324 B1 EP0644324 B1 EP 0644324B1
Authority
EP
European Patent Office
Prior art keywords
injection
injection quantity
values
established
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.)
Expired - Lifetime
Application number
EP94109088A
Other languages
German (de)
English (en)
Other versions
EP0644324A1 (fr
Inventor
Helmut Dr. Eichlseder
Günter Schenkermayr
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
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 Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP0644324A1 publication Critical patent/EP0644324A1/fr
Application granted granted Critical
Publication of EP0644324B1 publication Critical patent/EP0644324B1/fr
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
    • F02D41/30—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
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
    • 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
    • F02D2250/32—Air-fuel ratio control in a diesel engine

Definitions

  • the invention relates according to the preamble of claim 1 to a method known from EP-B 0 377 596 for fuel metering of a diesel internal combustion engine.
  • the fuel metering in the part-load range of the internal combustion engine is controlled, whereas the fuel metering at full load is carried out in a regulated manner via additional signals from a lambda probe arranged in the exhaust line of the internal combustion engine.
  • the injection pump part is given a load point-dependent injection quantity from a characteristic map as a function of an accelerator pedal position and other operating parameters.
  • a characteristic map as a function of an accelerator pedal position and other operating parameters.
  • it is also customary in the injection pump from the context of the quantity signal box position or delivery time and machine or pump speed to determine the respective injection quantity.
  • the invention is based on the object of avoiding the injection quantities which differ in the known method of fuel metering for the reasons mentioned above by operating-dependent corrective measures on the injection pump.
  • the injection correction according to the invention is used in accordance with claim 4 for lower to medium partial load and exhaust gas recirculation regulated by air mass, and in accordance with claim 5 at full load for limiting the injection quantity.
  • an injection quantity value is specified from a map to the signal box of a speed-controlled quantity signal box. Furthermore, in the case of such injection pumps, injection quantities are determined from the correlation of the quantity signal box position and the machine or pump speed, the values of which are relatively inaccurate due to different fuel quality and exemplary tolerance-related scattering caused by the injection equipment and changes related to runtime.
  • the voltage signals of a lean lambda probe acted upon by the exhaust gas of the diesel internal combustion engine are fed to an arithmetic unit of the electronic injection pump, the actual or effective injection quantity being derived from the respective actual lambda value and an associated actual intake air mass value is calculated or determined.
  • This determined for each load point, effective injection quantity value is also determined from the quantity signal box position or delivery period and machine or. Pump speed-determined relatively inaccurate injection quantity value in relation to the formation of a correction signal. With the aid of this correction signal, the injection quantity resulting from the deviation caused by the injection equipment and / or the fuel is corrected.
  • an injection quantity-relevant operating parameter e.g. Machine or pump speed - affects the signal formation disadvantageously or unfavorably.
  • the dynamic rates of change are therefore compared over a predetermined period of time with a predetermined, maximum rate of change. If this maximum rate of change is exceeded within the time window, the signal generation is stopped and restarted. This means that correction signals are not generated in the event of a relatively rapid dynamic load change.
  • the values stored in a target map for injection quantities of an electronic injection pump can be overwritten by the corrected injection quantity values.
  • the method according to the invention serves to limit the injection quantity and thus to avoid black smoke.

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)
  • Exhaust-Gas Circulating Devices (AREA)

Claims (5)

  1. Procédé de dosage du carburant d'un moteur à combustion interne diesel selon lequel :
    • pour la valeur d'une quantité à injecter obtenue en relation avec les paramètres d'état et les paramètres de fonctionnement dans un champ caractéristiques, on prédétermine la quantité à injecter par une pompe à injection du moteur,
    • en outre on influence les quantités à injecter en fonction de la charge à l'aide d'une sonde Lambda exposée aux gaz d'échappement du moteur diesel,
    caractérisé en ce que
    • en un point de charge on détermine la quantité à injecter effectivement à partir de la valeur réelle présente du coefficient Lambda et d'une valeur réelle des masses d'air aspirées, et
    • à partir de cette valeur obtenue des quantités à injecter on met en relation avec la valeur de la quantité à injecter définie notamment par la position du mécanisme de dosage ou la durée du transfert dépendant du régime, pour former un signal de correction,
    • avec ce signal de correction on corrige la quantité à injecter dont la déviation est provoquée par l'installation d'injection et/ou les caractéristiques du carburant.
  2. Procédé selon la revendication 1,
    caractérisé en ce que
    pendant que l'on détermine les différentes quantités à injecter en un point de charge et que l'on forme les valeurs de correction à partir des taux de variation dynamiques d'un paramètre de fonctionnement concernant la quantité à injecter, par exemple le régime du moteur, on compare pendant un intervalle de temps prédéterminé à un taux de variation maximum donné, et en cas de dépassement du taux de variation maximum on arrête la formation des valeurs de correction.
  3. Procédé selon les revendications 1 ou 2,
    caractérisé en ce qu'
    on souscrit les valeurs enregistrées dans un champ de caractéristiques de quantité à injecter, de consigne, par des valeurs de quantité à injecter corrigées.
  4. Procédé selon les revendications 1 à 3,
    caractérisé en ce que
    dans la plage de charge inférieure jusqu'à la plage de charge partielle moyenne, et la réinjection des gaz d'échappement régulés en fonction de la masse d'air, on utilise des quantités à injecter, corrigées.
  5. Procédé selon les revendications 1 à 4,
    caractérisé par
    l'application de la limitation des quantités à injecter à la charge maximale.
EP94109088A 1993-09-22 1994-06-14 Procédé pour doser le carburant pour moteurs diesel Expired - Lifetime EP0644324B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4332103 1993-09-22
DE4332103A DE4332103A1 (de) 1993-09-22 1993-09-22 Verfahren zur Kraftstoffzumessung einer Diesel-Brennkraftmaschine

Publications (2)

Publication Number Publication Date
EP0644324A1 EP0644324A1 (fr) 1995-03-22
EP0644324B1 true EP0644324B1 (fr) 1997-09-10

Family

ID=6498234

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94109088A Expired - Lifetime EP0644324B1 (fr) 1993-09-22 1994-06-14 Procédé pour doser le carburant pour moteurs diesel

Country Status (2)

Country Link
EP (1) EP0644324B1 (fr)
DE (2) DE4332103A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3878258B2 (ja) * 1996-11-01 2007-02-07 株式会社日立製作所 エンジン制御装置

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3011595A1 (de) * 1980-03-26 1981-10-01 Robert Bosch Gmbh, 7000 Stuttgart Korrektureinrichtung fuer ein kraftstoffmesssystem bei einer brennkraftmaschine
DE3248745A1 (de) * 1982-12-31 1984-07-05 Robert Bosch Gmbh, 7000 Stuttgart Regelsystem fuer eine brennkraftmaschine
DE3400513A1 (de) * 1984-01-10 1985-07-18 Robert Bosch Gmbh, 7000 Stuttgart Vollastbegrenzung einer brennkraftmaschine
DE3510216A1 (de) * 1985-03-21 1986-09-25 Robert Bosch Gmbh, 7000 Stuttgart Verfahren zur beeinflussung der zumessung von kraftstoff in eine brennkraftmaschine
DE3729771A1 (de) * 1987-09-05 1989-03-16 Bosch Gmbh Robert Verfahren und einrichtung zur kraftstoffzumessung bei einer diesel-brennkraftmaschine
SU1576705A2 (ru) * 1988-05-17 1990-07-07 Челябинский Политехнический Институт Им.Ленинского Комсомола Регул тор частоты вращени двигател внутреннего сгорани
DE3925877C2 (de) * 1989-08-04 1998-10-08 Bosch Gmbh Robert Verfahren und Einrichtung zur Steuerung der Kraftstoffzumessung bei einer Dieselbrennkraftmaschine
DE3929746A1 (de) * 1989-09-07 1991-03-14 Bosch Gmbh Robert Verfahren und einrichtung zum steuern und regeln einer selbstzuendenden brennkraftmaschine
DE4031367A1 (de) * 1990-10-04 1992-04-09 Bosch Gmbh Robert Steuersystem fuer eine selbstzuendende brennkraftmaschine
JPH04311643A (ja) * 1991-04-10 1992-11-04 Hitachi Ltd エンジンの気筒流入空気量算出方法

Also Published As

Publication number Publication date
EP0644324A1 (fr) 1995-03-22
DE4332103A1 (de) 1995-03-23
DE59404016D1 (de) 1997-10-16

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