DE102006060851A1 - Fuel supply system controlling method for petrol engine, involves injecting liquid fuel into engine cylinder when petrol engine is operated with liquid fuel, and closing injection valve when engine is operated with gaseous fuel - Google Patents

Fuel supply system controlling method for petrol engine, involves injecting liquid fuel into engine cylinder when petrol engine is operated with liquid fuel, and closing injection valve when engine is operated with gaseous fuel Download PDF

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Publication number
DE102006060851A1
DE102006060851A1 DE102006060851A DE102006060851A DE102006060851A1 DE 102006060851 A1 DE102006060851 A1 DE 102006060851A1 DE 102006060851 A DE102006060851 A DE 102006060851A DE 102006060851 A DE102006060851 A DE 102006060851A DE 102006060851 A1 DE102006060851 A1 DE 102006060851A1
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Germany
Prior art keywords
fuel
engine
operated
liquid fuel
injection valve
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Withdrawn
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DE102006060851A
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German (de)
Inventor
Andreas Dipl.-Ing. Biemelt
Michael Dipl.-Ing. Illek
Andreas Dr. Techn. Mlejnek
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Mercedes Benz Group AG
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DaimlerChrysler AG
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Priority to DE102006060851A priority Critical patent/DE102006060851A1/en
Publication of DE102006060851A1 publication Critical patent/DE102006060851A1/en
Withdrawn legal-status Critical Current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
    • 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
    • F02D19/0639—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 characterised by the type of fuels
    • F02D19/0642—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 characterised by the type of fuels at least one fuel being gaseous, the other fuels being gaseous or liquid at standard 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
    • F02D19/0602—Control of components of the fuel supply system
    • F02D19/0605—Control of components of the fuel supply system to adjust the fuel pressure or temperature
    • 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
    • F02D19/0663—Details on the fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02D19/0686—Injectors
    • F02D19/0694—Injectors operating with a plurality of fuels
    • 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
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02M21/0287—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers characterised by the transition from liquid to gaseous phase ; Injection in liquid phase; Cooling and low temperature storage
    • 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
    • F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
    • F02M31/20—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for cooling
    • 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
    • F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • 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
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
    • 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
    • Y02T10/12—Improving ICE efficiencies
    • 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

Abstract

The method involves injecting liquid fuel into an engine cylinder (12) using an injection valve (14) when a petrol engine (10) is operated with liquid fuel. The injection valve is closed when the petrol engine is operated with gaseous fuel. The injection valve is arranged at a fuel distributor rail (16), where a constant liquid fuel is pumped using the fuel distributor rail. A fuel cooler (26) is arranged in a fuel circulation system, where the fuel distributor rail is attached to the circulation system. An independent claim is also included for an engine control for controlling an injection valve for liquid fuel and for controlling insertion of gaseous fuel into an engine cylinder.

Description

Die Erfindung betrifft ein Verfahren zum Steuern eines Kraftstoffzufuhrsystems für einen wahlweise mit Flüssigkraftstoff und mit gasförmigen Kraftstoff betreibbaren Ottomotor. Üblicherweise ist bei einem solchen Ottomotor vorgesehen, dass im Betrieb mit Flüssigkraftstoff Einspritzventile Flüssigkraftstoff in den Zylinder einspritzen, während im Betrieb mit gasförmigen Kraftstoffen Einbringmittel für gasförmigen Kraftstoff selbigen in einen Motorzylinder einbringen.The The invention relates to a method for controlling a fuel supply system for an optional with liquid fuel and with gaseous fuel operable gasoline engine. Usually is provided in such a gasoline engine that in operation with Liquid fuel Injectors Liquid fuel inject into the cylinder while in operation with gaseous Fuels gaseous fuel injection means bring the same in an engine cylinder.

Bei einem Ottomotor der genannten Art wird bevorzugt als gasförmiger Kraftstoff Methan (CH4) verwendet, bei dessen Einsatz die CO2-Emission der Ottomotoren abgesenkt wird. Im bivalenten Betrieb wird sowohl die Verbrennung von konventionellen Ottokraftstoffen, als auch der Betrieb mit Methan ermöglicht. Der bivalente Betrieb ist deswegen notwendig, weil die Tankstelleninfrastruktur für gasförmige Kraftstoffe nicht ausreichend gut ist.In a gasoline engine of the type mentioned, methane (CH 4 ) is preferably used as the gaseous fuel, in the use of which the CO 2 emission of the gasoline engines is lowered. In bivalent operation both the combustion of conventional gasoline and the operation with methane is possible. Bivalent operation is necessary because the filling station infrastructure for gaseous fuels is not sufficiently good.

Die Einspritzventile (Benzininjektoren) werden beim Betrieb mit Flüssigkraftstoffen durch den Kraftstoffdurchfluss gekühlt. Diese Kühlung entfällt jedoch beim Betrieb des Ottomotors mit gasförmigen Kraftstoff. Die möglichen Folgen für das Benzinsystem sind:

  • – Dampfblasenbildung und damit Verschlechterung des Heißstartverhaltens bzw. des Wiederstartverhaltens beim Betriebsartenwechsel von Gas zu Benzin,
  • – Versottung und Verkokung der Injektoren und damit Verschlechterung der Gemischbildungsqualität bei der Benzineinspritzung,
  • – mechanische Schäden an der Injektorspritze aufgrund der thermomechanischen Belastung,
  • – Beschädigung der Injektoraktorik aufgrund der thermomechanischen Belastung.
The injectors (gasoline injectors) are cooled by the fuel flow during operation with liquid fuels. However, this cooling is eliminated during operation of the gasoline engine with gasoline fuel. The possible consequences for the gasoline system are:
  • - formation of vapor bubbles and thus deterioration of the hot start behavior or the restart behavior when changing the operating mode from gas to gasoline,
  • - Sooting and coking of the injectors and thus deterioration of the mixture formation quality in the gasoline injection,
  • Mechanical damage to the injector syringe due to thermo-mechanical stress,
  • Damage to the injector actuator due to the thermomechanical load.

Es ist Aufgabe der Erfindung, die genannten Folgen zu vermeiden.It Object of the invention to avoid the consequences mentioned.

Die Aufgabe wird dadurch gelöst, dass im Betrieb des Ottomotors mit gasförmigen Kraftstoff alle Einspritzventile gekühlt werden.The Task is solved by that during operation of the gasoline engine with gas fuel all injectors chilled become.

Üblicherweise sind die Einspritzventile (Injektoren) an einer Kraftstoffverteilerleiste (Rail) angeordnet. Das Kühlen der Einspritzventile kann dann durch ständiges Pumpen von Flüssigkraftstoffen durch die Kraftstoffverteilerleiste erfolgen. Bevorzugt wird der Flüssigkraftstoff im Kreis gepumpt, wobei er an der Kraftstoffverteilerleiste Wärme von den Einspritzventilen aufnimmt und an einer von der Kraftstoffverteilerleiste verschiedener Stelle des Kraftstoffkreislaufs Wärme abgibt.Usually are the injectors (injectors) on a fuel rail (Rail) arranged. The cooling the injectors can then by constantly pumping liquid fuels through the fuel rail. The liquid fuel is preferred pumped in a circle, taking heat from the fuel rail receives the injectors and at one of the fuel rail different place of the fuel circuit gives off heat.

Die Abgabe der von den Einspritzventilen stammenden Wärme aus dem Flüssigkeitskraftstoff kann z. B. an einer Kraftstoffleitung erfolgen, die durch den Bereich des Kühlgebläses verläuft, oder die von Fahrtwind erreicht wird.The Release of the heat coming from the injectors the liquid fuel can z. B. on a fuel line passing through the area the cooling fan runs, or the is reached by the wind.

Bevorzugt ist in dem Kraftstoffkreislaufsystem, zu dem die Kraftstoffverteilerleiste gehört, jedoch ein Kraftstoffkühler angeordnet. Es kann sich hierbei um ein für Ottomotoren gebräuchlichen Kraftstoffkühler handeln, der geeignet platziert ist.Prefers is in the fuel cycle system to which the fuel rail belongs, however, a fuel cooler arranged. It may be a common for gasoline engines Fuel cooler act appropriately placed.

Zur Erfindung gehört auch eine Motorsteuerung zur wahlweisen Steuerung von Einspritzventilen für Flüssigkraftstoff und von Einbringmitteln für gasförmigen Kraftstoff in einen Motorzylinder, wobei die Motorsteuerung dazu ausgebildet ist, während des Betreibens der Einbringmittel für gasförmigen Kraftstoff zu bewirken, dass in einem Kreislauf Flüssigkraftstoff an den Einspritzventilen vorbeigeführt wird.to Invention belongs also an engine controller for selectively controlling injection valves for liquid fuel and delivery means for gaseous Fuel into an engine cylinder, with the engine control to do so is formed while to effect the operation of the gaseous fuel injection means, that in a cycle liquid fuel is passed past the injectors.

Nachfolgend wird eine bevorzugte Ausführungsform der Erfindung unter Bezug auf die Zeichnung beschrieben, welche schematisch einen Ottomotor und ein zugehöriges Kraftstoffzuführsystem für Flüssigkraftstoff zeigt.following becomes a preferred embodiment of the invention described with reference to the drawing, which schematically a gasoline engine and an associated Kraftstoffzuführsystem for liquid fuel shows.

Ein im Ganzen mit 10 bezeichneter Ottomotor umfasst vier Zylinder 12. In die Zylinder 12 ist wahlweise Methan durch in der Figur nicht gezeigte Einbringmittel einbringbar. Alternativ kann der Ottomotor mit Flüssigkraftstoff (Benzin) betrieben werden. Hierzu ist jedem Zylinder 12 ein Einspritzventil 14 zugeordnet. Die Einspritzventile 14 sind an einer gemeinsamen Kraftstoffverteilerleiste 16 angeordnet (Rail). Wenn nun der Ottomotor 10 gerade mit gasförmigen Kraftstoff betrieben wird, fließt kein Flüssigkraftstoff durch die Einspritzventile 14. Über die Zylinder 12 werden die Einspritzventile 14 erwärmt, und es tritt eine Vielzahl von Nachteilen wie Verschmutzung und Beschädigung an den Einspritzventilen 14 auf. Durch eine Kühlung der Einspritzventile 14 können die Nachteile in ihrem Ausmaß verringert oder vollständig beseitigt werden. Um eine solche Kühlung zu ermöglichen, wird der Flüssigkraftstoff selbst verwendet: Der Flüssigkraftstoff läuft in einem Kraftstoffkreislauf, welcher die Kraftstoffverteilerleiste 16 selbst, eine Kraftstoffrücklaufleitung 18, einen Kraftstofftank 20, eine Kraftstoffvorförderpumpe 22, eine Kraftstoffhochdruckpumpe 24 und einen Kraftstoffkühler 26 umfasst. Der Flüssigkraftstoff nimmt in der Kraftstoffverteilerleiste 16 von den Einspritzventilen 14 Wärme auf. Diese gibt er nachfolgend ab. Vor allem der Kraftstoffkühler 26 dient zum Abkühlen des Flüssigkraftstoffs, bevor dieser wieder in die Kraftstoffverteilerleiste eintritt.A whole with 10 designated gasoline engine comprises four cylinders 12 , Into the cylinders 12 Optionally, methane can be introduced by means of introduction not shown in the figure. Alternatively, the gasoline engine with liquid fuel (gasoline) can be operated. This is every cylinder 12 an injection valve 14 assigned. The injectors 14 are on a common fuel rail 16 arranged (rail). If now the gasoline engine 10 is operated with gaseous fuel, no liquid fuel flows through the injectors 14 , About the cylinders 12 become the injectors 14 heated, and there are a variety of disadvantages such as pollution and damage to the injectors 14 on. By cooling the injectors 14 the disadvantages can be reduced or completely eliminated in their extent. To enable such cooling, the liquid fuel itself is used: The liquid fuel runs in a fuel circuit, which is the fuel rail 16 itself, a fuel return line 18 , a fuel tank 20 , a fuel priming pump 22 , a high-pressure fuel pump 24 and a fuel cooler 26 includes. The liquid fuel decreases in the fuel rail 16 from the injectors 14 Heat up. He gives these below. Especially the fuel cooler 26 Used to cool the liquid fuel before it returns to power material distribution strip entry.

Alternativ zu der in der Figur gezeigten Anordnung des Kraftstoffkühlers zwischen Kraftstoffhochdruckpumpe 24 und Kraftstoffverteilerleiste 16 kann der Kraftstoffkühler auch in der Kraftstoffrücklaufleitung 18, im Tank 20, zwischen Tank 20 und Kraftstoffvorförderpumpe 22 oder zwischen Kraftstoffvorförderpumpe 22 und Kraftstoffhochdruckpumpe 24 angeordnet sein.Alternatively to the arrangement of the fuel cooler shown in the figure between high-pressure fuel pump 24 and fuel rail 16 The fuel cooler can also be in the fuel return line 18 , in the tank 20 , between tank 20 and fuel priming pump 22 or between fuel feed pump 22 and high-pressure fuel pump 24 be arranged.

Als Kühlmittel im Kraftstoffkühler 26 kann Luft, Wasser oder auch ein spezielles Kühlmittel aus der Klimatechnik zum Einsatz kommen. Alternativ zu der Platzierung des Kraftstoffkühlers 26 an geeigneter Stelle kann auch ganz auf einen Kraftstoffkühler verzichtet werden, wenn eine ausreichende Kühlung durch einen Wärmetauscher erfolgt, z. B. indem die Kraftstoffleitung in den Bereich eines Kühlgebläses verlegt wird oder den Fahrtwind zugänglich ist.As a coolant in the fuel cooler 26 Air, water or even a special coolant from the air conditioning technology can be used. Alternatively to the placement of the fuel cooler 26 at a suitable point can be completely dispensed with a fuel cooler when sufficient cooling is carried out by a heat exchanger, for. B. by the fuel line is moved to the area of a cooling fan or the wind is accessible.

Claims (4)

Verfahren zum Steuern eines Kraftstoffzufuhrsystems für einen wahlweise mit Flüssigkraftstoff und mit gasförmigem Kraftstoff betreibbaren Ottomotor, bei dem im Betrieb mit Flüssigkraftstoff zumindest ein Einspritzventil (14) Flüssigkraftstoff in zumindest einen Motorzylinder (12) einspritzt, dadurch gekennzeichnet, dass im Betrieb des Ottomotors (10) mit gasförmigem Kraftstoff alle Einspritzventile (14) gekühlt werden.Method for controlling a fuel supply system for a gasoline engine which can optionally be operated with liquid fuel and with gaseous fuel, in which at least one injection valve (in 14 ) Liquid fuel in at least one engine cylinder ( 12 ), characterized in that during operation of the gasoline engine ( 10 ) with gaseous fuel all injectors ( 14 ) are cooled. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Einspritzventile (14) an einer Kraftstoffverteilerleiste (16) angeordnet sind, durch die ständig Flüssigkraftstoff gepumpt wird, der an einer von der Kraftstoffverteilerleiste (16) verschiedenen Stelle (26) eines Kraftstoffkreislaufs gekühlt wird.Method according to claim 1, characterized in that the injection valves ( 14 ) on a fuel rail ( 16 ) are constantly pumped through the liquid fuel, which is at one of the fuel rail ( 16 ) different place ( 26 ) of a fuel circuit is cooled. Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass in einem Kraftstoffkreislaufsystem, zu dem die Kraftstoffverteilerleiste (16) gehört, ein Kraftstoffkühler (26) angeordnet ist.A method according to claim 2, characterized in that in a fuel cycle system to which the fuel rail ( 16 ), a fuel cooler ( 26 ) is arranged. Motorsteuerung zur wahlweisen Steuerung von Einspritzventilen (14) für Flüssigkraftstoff und von Einbringmitteln für gasförmigen Kraftstoff in einen Motorzylinder, wobei die Motorsteuerung dazu ausgebildet ist, während des Betreibens der Einbringmittel für gasförmigen Kraftstoff zu bewirken, dass in einem Kreislauf Flüssigkraftstoff an den Einspritzventilen (14) vorbeigeführt wird.Motor control for selectively controlling injection valves ( 14 ) for liquid fuel and gaseous fuel injection means into an engine cylinder, the engine control being adapted to cause, during operation of the gaseous fuel injection means, liquid in the circuit to be injected into the injection valves ( 14 ) is passed.
DE102006060851A 2006-12-22 2006-12-22 Fuel supply system controlling method for petrol engine, involves injecting liquid fuel into engine cylinder when petrol engine is operated with liquid fuel, and closing injection valve when engine is operated with gaseous fuel Withdrawn DE102006060851A1 (en)

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DE102006060851A DE102006060851A1 (en) 2006-12-22 2006-12-22 Fuel supply system controlling method for petrol engine, involves injecting liquid fuel into engine cylinder when petrol engine is operated with liquid fuel, and closing injection valve when engine is operated with gaseous fuel

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DE102006060851A DE102006060851A1 (en) 2006-12-22 2006-12-22 Fuel supply system controlling method for petrol engine, involves injecting liquid fuel into engine cylinder when petrol engine is operated with liquid fuel, and closing injection valve when engine is operated with gaseous fuel

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007025075A1 (en) * 2007-05-30 2008-12-04 Volkswagen Ag Method for operating an internal combustion engine
DE102007025076A1 (en) * 2007-05-30 2008-12-04 Volkswagen Ag Method for operating an internal combustion engine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007025075A1 (en) * 2007-05-30 2008-12-04 Volkswagen Ag Method for operating an internal combustion engine
DE102007025076A1 (en) * 2007-05-30 2008-12-04 Volkswagen Ag Method for operating an internal combustion engine
US7832381B2 (en) 2007-05-30 2010-11-16 Volkswagen Ag Method of operating an internal combustion engine
US7853397B2 (en) 2007-05-30 2010-12-14 Volkswagen Aktiengesellschaft Method of operating an internal combustion engine

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Owner name: DAIMLER AG, 70327 STUTTGART, DE

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