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WO1991014089A1 - Procede d'exploitation d'un moteur a combustion interne avec des carburants ayant des compositions diverses - Google Patents

Procede d'exploitation d'un moteur a combustion interne avec des carburants ayant des compositions diverses Download PDF

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Publication number
WO1991014089A1
WO1991014089A1 PCT/EP1991/000235 EP9100235W WO9114089A1 WO 1991014089 A1 WO1991014089 A1 WO 1991014089A1 EP 9100235 W EP9100235 W EP 9100235W WO 9114089 A1 WO9114089 A1 WO 9114089A1
Authority
WO
WIPO (PCT)
Prior art keywords
fuel
internal combustion
combustion engine
buffer volume
fuels
Prior art date
Application number
PCT/EP1991/000235
Other languages
German (de)
English (en)
Inventor
Werner Muhl
Original Assignee
Bayerische Motoren Werke Aktiengesellschaft
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 Aktiengesellschaft filed Critical Bayerische Motoren Werke Aktiengesellschaft
Publication of WO1991014089A1 publication Critical patent/WO1991014089A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D33/00—Controlling delivery of fuel or combustion-air, not otherwise provided for
    • F02D33/003—Controlling the feeding of liquid fuel from storage containers to carburettors or fuel-injection apparatus ; Failure or leakage prevention; Diagnosis or detection of failure; Arrangement of sensors in the fuel system; Electric wiring; Electrostatic discharge
    • F02D33/006—Controlling the feeding of liquid fuel from storage containers to carburettors or fuel-injection apparatus ; Failure or leakage prevention; Diagnosis or detection of failure; Arrangement of sensors in the fuel system; Electric wiring; Electrostatic discharge depending on engine operating conditions, e.g. start, stop or ambient conditions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
    • F02D19/08—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed simultaneously using pluralities of fuels
    • F02D19/082—Premixed fuels, i.e. emulsions or blends
    • F02D19/084—Blends of gasoline and alcohols, e.g. E85
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
    • F02D19/08—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed simultaneously using pluralities of fuels
    • F02D19/082—Premixed fuels, i.e. emulsions or blends
    • F02D19/085—Control based on the fuel type or composition
    • F02D19/087—Control based on the fuel type or composition with determination of densities, viscosities, composition, concentration or mixture ratios of fuels
    • F02D19/088—Control based on the fuel type or composition with determination of densities, viscosities, composition, concentration or mixture ratios of fuels by estimation, i.e. without using direct measurements of a corresponding sensor
    • 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
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0047—Layout or arrangement of systems for feeding fuel
    • F02M37/0064—Layout or arrangement of systems for feeding fuel for engines being fed with multiple fuels or fuels having special properties, e.g. bio-fuels; varying the fuel composition
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N19/00—Starting aids for combustion engines, not otherwise provided for
    • F02N19/001—Arrangements thereof
    • 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
    • F02B1/00—Engines characterised by fuel-air mixture compression
    • F02B1/02—Engines characterised by fuel-air mixture compression with positive ignition
    • 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
    • F02B2201/00—Fuels
    • F02B2201/06—Dual fuel applications
    • F02B2201/062—Liquid and liquid
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/30—Use of alternative fuels, e.g. biofuels

Definitions

  • the invention relates to an internal combustion engine operating method according to the preamble of claim 1.
  • the invention relates to an operating method for a spark-ignited internal combustion engine which is operated with petrol fuels containing methanol in different concentrations Attached is.
  • the invention can also be transferred to other cases in which internal combustion engines are to be operated with fuels of different compositions.
  • spark-ignited internal combustion engines can be operated both with conventional gasoline fuels and with gasoline fuels with up to 90% methanol content.
  • a motor vehicle is to be operated with an internal combustion engine with fuels of different compositions
  • An electronic control unit for controlling the mixture formation system or the fuel metering device contains in the same way two control algorithms adapted to the two fuel compositions. Depending on the relevant fuel composition determined by the currently switched on storage container, the metering device is controlled with the respectively associated algorithm.
  • the internal combustion engine is thus independent of the current methanol content in the gasoline fuel Always operated with a stoichiometric mixture and thus at the desired operating point, the so-called metering parameters, for example in the form of correction factors, are continuously in an electronic control unit assigned to the mixture formation system or the fuel metering device stored, the internal combustion engine can generally be started successfully again after a standstill, even if — as is known — a lambda probe is not yet ready for operation when the internal combustion engine is cold. In the so-called "Motronic" from Bosch, this system is known as "adaptive lambda control".
  • the fuel-metering device Accordingly 'is supplied at a subsequent to a standstill start of the internal combustion engine from a fuel buffer volume, the fuel-metering device.
  • This buffer volume contains fuel of the composition that corresponds to the dosing parameters stored before the standstill. Since at the same time the metering device is separated from the "new composition" fuel, a safe start of the internal combustion engine is ensured.
  • claim 2 proposes to supply the internal combustion engine with fuel from the buffer volume after a cold start, as long as that, for example, as a lambda probe-designed exhaust gas analysis device is not yet ready for operation. The connection between the metering device (the mixture formation system) and the regular fuel reservoir is only established when the lambda probe is ready for operation.
  • An internal combustion engine 1 with an intake tract 2 and an exhaust system 3 is shown.
  • In the intake tract 2 there is an air mass meter 4 and at least one fuel injection valve 5.
  • In the exhaust system 3 there is an exhaust gas analysis device in the form of a lambda probe 6 and others an exhaust gas purification device in the form of a catalyst 7 is provided.
  • the internal combustion engine is, for example, a spark-ignited, mixture-compressing internal combustion engine which is operated with a stoichiometric mixture for successful pollutant conversion in the catalytic converter.
  • the injection valve 5 also called fuel metering device
  • This electronic control unit 8 receives signals from the air mass meter 4 and the lambda probe 6, among other things. As further signals - these are shown throughout in dash-dotted lines - the electronic control unit 8 processes, inter alia, signals from an engine speed sensor and a plurality of temperature sensors (not shown).
  • the fuel injector 5 is supplied with fuel via a fuel line 9.
  • This fuel line 9 initially leads to a fuel buffer volume 10 and from here via a shut-off valve 11 to a fuel storage container 12.
  • a coupling line 13 is shown only schematically , which connects a tank ventilation system of the buffer volume 10 with a tank ventilation system of the storage container 12.
  • further elements for example a fuel feed pump or an ignition device
  • these are not essential for the following explanation.
  • the injection valve 5 is actuated, inter alia by evaluating the signals of the lambda probe 6, so that the internal combustion engine 1 is operated with a stoichiometric mixture.
  • the multiplicative correction values required for this in relation to a basic map for the control of the injection valve stored in the electronic control unit 8 are continuously stored in the electronic control unit 8. Now the fuel supply is running low, so that a motor vehicle with the system shown starts a petrol station.
  • the internal combustion engine is switched off here, according to the invention the check valve 11 is closed. For this purpose, the check valve 11 is controlled by the electronic control unit 8.
  • the buffer volume 10 which still contains fuel of "old composition".
  • the injection valve 5 is supplied according to the invention from the buffer volume 10.
  • the metering values stored in the electronic control unit 8 correspond exactly to the fuel in the buffer volume.
  • the shut-off valve 11 is opened again by actuation by the control unit 8, as a result of which the buffer volume 10 is filled again and the injection valve 5 can be supplied with fuel over a long period of time.
  • the plurality of injection valves 5 are preferably supplied by a single buffer volume.
  • a buffer volume with a volume of approx. 1.5 liters for a conventional internal combustion engine of a car proven sufficient.
  • the tank ventilation system known per se is also advantageously summarized.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

Afin de pouvoir exploiter un moteur (1) à combustion interne à allumage par étincelle avec des carburants ayant des proportions diverses de méthanol, on utilise une régulation adaptative de lambda qui enregistre les valeurs caractéristiques de dosage fournies à l'installation de préparation du mélange en fonction des signaux d'une sonde de lambda (6). Lorsqu'un véhicule équipé avec cette installation est approvisionné en un combustible ayant une proportion de méthanol sensiblement différente, alors que son réservoir (12) est presque vide, puis est garé, des difficultés peuvent se présenter lors d'un démarrage ultérieur à froid. Afin de résoudre ce problème, une soupape de fermeture (11) est placée en aval du réservoir et en amont d'un volume tampon (10) de carburant.
PCT/EP1991/000235 1990-03-15 1991-02-08 Procede d'exploitation d'un moteur a combustion interne avec des carburants ayant des compositions diverses WO1991014089A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4008372A DE4008372A1 (de) 1990-03-15 1990-03-15 Verfahren zum betrieb einer brennkraftmaschine mit brennstoffen unterschiedlicher zusammensetzung
DEP4008372.1 1990-03-15

Publications (1)

Publication Number Publication Date
WO1991014089A1 true WO1991014089A1 (fr) 1991-09-19

Family

ID=6402321

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1991/000235 WO1991014089A1 (fr) 1990-03-15 1991-02-08 Procede d'exploitation d'un moteur a combustion interne avec des carburants ayant des compositions diverses

Country Status (2)

Country Link
DE (1) DE4008372A1 (fr)
WO (1) WO1991014089A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4027948B4 (de) * 1990-09-04 2005-06-23 Robert Bosch Gmbh Kraftstoffversorgungssystem und Tankanlage für eine Brennkraftmaschine
SE470525B (sv) * 1992-11-18 1994-07-04 Saab Automobile Startsystem för förbränningsmotorer vilka kan drivas av olika bränslen
JP4169046B2 (ja) * 2006-05-23 2008-10-22 トヨタ自動車株式会社 内燃機関の制御装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5776231A (en) * 1980-10-29 1982-05-13 Toyota Motor Corp Electronically controlled fuel injection
US4481908A (en) * 1981-03-02 1984-11-13 Mazda Motor Corporation Closed-loop fuel control system for internal combustion engine
WO1990006427A1 (fr) * 1988-12-10 1990-06-14 Robert Bosch Gmbh Systeme de regulation de l'injection du carburant
US4945881A (en) * 1989-06-16 1990-08-07 General Motors Corporation Multi-fuel engine control with initial delay

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2450306A1 (de) * 1971-09-29 1976-04-29 Volkswagenwerk Ag Verfahren zum betreiben einer brennkraftmaschine und einrichtung zur durchfuehrung des verfahrens
EP0142490A3 (fr) * 1983-10-17 1987-05-27 Jenbacher Werke AG Procédé d'opération d'un moteur à gaz
JPS6137451U (ja) * 1984-08-10 1986-03-08 三菱自動車工業株式会社 アルコ−ルエンジンの補助燃料供給装置
JPH0410370Y2 (fr) * 1985-11-19 1992-03-13
US4741318A (en) * 1986-08-22 1988-05-03 General Motors Corporation Canister purge controller
BR8801648A (pt) * 1988-04-07 1989-11-07 Bosch Do Brasil Sistema de partida a frio para motores de combustao interna a alcool,processo de partida a frio e dispositivo a ser utilizado nos mesmos

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5776231A (en) * 1980-10-29 1982-05-13 Toyota Motor Corp Electronically controlled fuel injection
US4481908A (en) * 1981-03-02 1984-11-13 Mazda Motor Corporation Closed-loop fuel control system for internal combustion engine
WO1990006427A1 (fr) * 1988-12-10 1990-06-14 Robert Bosch Gmbh Systeme de regulation de l'injection du carburant
US4945881A (en) * 1989-06-16 1990-08-07 General Motors Corporation Multi-fuel engine control with initial delay

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 6, no. 161 (M-151) 24 August 1982, & JP-A-57 076231 (TOYOTA MOTOR CORP.) 13 Mai 1982, siehe das ganze Dokument *

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Publication number Publication date
DE4008372A1 (de) 1991-09-19

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