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DE102009023674A1 - Internal combustion engine e.g. diesel engine, for use in e.g. passenger car, has gas supply system including liquefied gas fuel injector leading between turbocharger and combustion chamber in air inlet conduit - Google Patents

Internal combustion engine e.g. diesel engine, for use in e.g. passenger car, has gas supply system including liquefied gas fuel injector leading between turbocharger and combustion chamber in air inlet conduit Download PDF

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Publication number
DE102009023674A1
DE102009023674A1 DE102009023674A DE102009023674A DE102009023674A1 DE 102009023674 A1 DE102009023674 A1 DE 102009023674A1 DE 102009023674 A DE102009023674 A DE 102009023674A DE 102009023674 A DE102009023674 A DE 102009023674A DE 102009023674 A1 DE102009023674 A1 DE 102009023674A1
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Germany
Prior art keywords
combustion chamber
internal combustion
air inlet
combustion engine
supply system
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DE102009023674A
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German (de)
Inventor
Stephan Rudolph
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I-Tecc Innovative Technologies & Consulting GmbH
Tecc Innovative Technolog GmbH
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I-Tecc Innovative Technologies & Consulting GmbH
Tecc Innovative Technolog GmbH
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Priority to DE102009023674A priority Critical patent/DE102009023674A1/en
Publication of DE102009023674A1 publication Critical patent/DE102009023674A1/en
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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
    • F02D19/0647—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 the gaseous fuel being liquefied petroleum gas [LPG], liquefied natural gas [LNG], compressed natural gas [CNG] or dimethyl ether [DME]
    • 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
    • F02B43/00—Engines characterised by operating on gaseous fuels; Plants including such engines
    • F02B43/10—Engines or plants characterised by use of other specific gases, e.g. acetylene, oxyhydrogen
    • 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
    • F02D19/0692—Arrangement of multiple injectors per combustion chamber
    • 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
    • F02D19/10—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 peculiar to compression-ignition engines in which the main fuel is gaseous
    • 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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/04—Injectors peculiar thereto
    • F02M69/042—Positioning of injectors with respect to engine, e.g. in the air intake conduit
    • F02M69/046—Positioning of injectors with respect to engine, e.g. in the air intake conduit for injecting into both the combustion chamber and the intake conduit
    • 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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

The engine has a combustion chamber (14), and a fuel injection system including liquid fuel injectors (30) leading into the combustion chamber. An air inlet conduit (20) is connected with the combustion chamber, and a turbocharger (38) is arranged in the air inlet conduit. A gas supply system includes outlets leading into the air inlet conduit and includes a liquefied gas fuel injector (36) leading between the turbocharger and the combustion chamber in the air inlet conduit. The gas supply system is formed as a liquefied gas injection system.

Description

Die Erfindung betrifft einen Verbrennungsmotor nach dem Oberbegriff des Anspruchs 1.The The invention relates to an internal combustion engine according to the preamble of claim 1.

Die Bundesregierung fördert Autogas mit einem niedrigen Mineralölsteuersatz (EnergieStG vom 15. Juli 2006). Der verminderte Steuersatz gilt bis 31.12.2018. Mit Flüssiggas lassen sich – je nach Höhe des Benzin- bzw. Dieselpreises – signifikant Kraftstoffkosten einsparen. Wegen des im Vergleich zu Benzin und Diesel geringeren Kohlenstoffanteils im Flüssiggas entsteht bei der Verbrennung weniger CO2 als bei Benzin- und Dieselkraftstoffen, der Betrieb ist also klimaschonender als reiner Dieselbetrieb.The Federal Government promotes LPG with a low mineral oil tax rate (EnergieStG of 15. July 2006). The reduced tax rate applies until 31.12.2018. With liquefied can be - ever by height the price of gasoline or diesel - significant fuel costs save on. Because of compared to gasoline and diesel lower Carbon content in LPG combustion produces less CO2 than gasoline and diesel fuels, So the operation is more climate friendly than pure diesel operation.

Autogas ist – anders als Benzin und Diesel – nicht wassergefährdend und damit wesentlich umweltfreundlicher als die herkömmlichen Kraftstoffe. Autogas ist bei normalen Temperaturen unter einem Druck von wenigen bar flüssig.LPG is different as gasoline and diesel - not water pollutant and thus much more environmentally friendly than the conventional ones Fuels. LPG is under pressure at normal temperatures from a few bar liquid.

Die Nutzung von Autogas hat sich insbesondere im Bereich der PKW und Kleintransporter mit Vergaser- und einfachen Einspritz-Ottomotoren durchgesetzt. In diesem Bereich reicht es, Flüssiggas über einen Verdampfer gasförmig über den Luftansaugtrakt zuzumischen. Im Bereich der Dieselmotoren ist der Betrieb mit Gas insbesondere von stationären Motoren als sog. „Zündstrahlverfahren” bekannt. Dabei wird der eigentliche Zündvorgang – wie beim Dieselmotor üblich – durch die Einspritzung von Dieselkraftstoff initiiert. Über den Luftansaugtrakt wird dann Gas hinzugefügt. Da insbesondere stationäre BHKW-Motoren und Stromerzeuger stets mit gleicher Drehzahl und konstanter Last laufen, ist die Regulierung der Gaszufuhr relativ unproblematisch.The Use of LPG has become particularly in the area of passenger cars and Pick-up truck with carburetor and simple injection gasoline engines enforced. In this area, it is sufficient to LPG over a Evaporator in gaseous form over the air intake tract admix. In the field of diesel engines is the operation with gas especially from stationary Engines known as so-called "Zündstrahlverfahren". This is the actual ignition process - as in Diesel engine usual - through initiated the injection of diesel fuel. On the Air intake tract is then added to gas. Especially stationary CHP engines and generators always at the same speed and load run, the regulation of the gas supply is relatively unproblematic.

Im mobilen Bereich hingegen sind schnelle Drehzahl- und Lastwechsel die Regel. Hier ergeben sich mehrere Probleme:
Die lastabhängige schnelle Regelung der hinzugefügten Gasmenge.In the mobile sector, however, fast speed and load changes are the rule. Here are several problems:
The load-dependent fast regulation of the added gas quantity.

Eine große Gasmenge im Umlauf kann zu erhöhten Verbrennungs- und Zylinderkopftemperaturen führen.A size Gas volume in circulation can be increased Combustion and Cylinder head temperatures lead.

Aus der Flüssiggasphase bei einem Druck von 2 bar die notwendige Gasmenge in hinreichend kurzer Zeit hinzuzufügen.Out the liquefied gas phase at a pressure of 2 bar the necessary amount of gas in a sufficiently short To add time.

Regelung der Harnstoffdosierung bei EURO V-Fahrzeugen mit SCR-Technik.regulation the urea dosage for EURO V vehicles with SCR technology.

Mit geheizten Verdampfern wären unrealistisch große Rohr- und Düsenquerschnitte nötig, um die notwendige Gasmenge schnell genug zuzuführen.With heated evaporators would be unrealistically big Pipe and nozzle cross sections necessary, to supply the necessary amount of gas quickly enough.

Der Erfindung liegt die Aufgabe zugrunde, einen Verbrennungsmotor zu schaffen, der auch bei kombiniertem Betrieb mit flüssigem Kraftstoff und Flüssiggas bei Drehzahländerungen und Lastwechseln eine schnelle Anpassung der Flüssiggaszufuhr ermöglicht.Of the Invention is based on the object to an internal combustion engine even when combined with liquid fuel and LPG at speed changes and load changes allows rapid adjustment of the LPG supply.

Diese Aufgabe wird bei einem Verbrennungsmotor nach Anspruch 1 mit den Merkmalen dieses Anspruchs gelöst. Weiterbildungen und vorteilhafte Ausgestaltungen ergeben sich aus den Unteransprüchen.These Task is in an internal combustion engine according to claim 1 with the Characteristics of this claim solved. Further developments and advantageous embodiments emerge the dependent claims.

Bei der erfindungsgemäßen Lösung erfolgt die Injektion eines Flüssiggasstrahls in den Luftansaugtrakt. Dabei wird die Verdampfungsenthalpie aus der zur Verbrennung angesaugten Luft bezogen, die Anordnung liefert also zusätzlich eine Ladeluftkühlung und trägt damit zur Leistungssteigerung bei. Eine Turbinenpumpe kann mit einem Druck von bis zu über 6 bar einspritzen und ist damit in der Lage, die notwendigen Mengen in hinreichend kurzer Zeit in den notwendigen Grenzen geregelt zu injizieren. Die Regelung erfolgt über eine Kennfeldsteuerung. Hiermit wird insbesondere gewährleistet, dass das Verhältnis der Mengen von Dieselkraftstoff für den Zündstrahl zu hinzugefügtem Gas bei allen Lastwechseln optimal bleibt.at the solution according to the invention takes place Injection of a liquid gas jet in the air intake tract. The enthalpy of vaporization is eliminated related to the intake of combustion air, the arrangement provides in addition a charge air cooling and carries thus to increase performance. A turbine pump can with a Pressure up to about Inject 6 bar and is thus able to supply the necessary quantities regulated in the necessary limits in a sufficiently short time inject. The regulation takes place via a map control. This ensures in particular that the ratio the amounts of diesel fuel for the pilot to added gas remains optimal for all load changes.

Bei Ausfall des Gassystems erfolgt automatisch der Übergang zu reinem Dieselbetrieb. Der Betrieb mit Flüssiggas ist also eine zusätzliche Option zur Kraftstoffeinsparung, die aber jederzeit durch reinen Dieselbetrieb ersetzt werden kann. Durch die Beimischung von Gas ändert sich die NOX-Emission gegenüber reinem Dieselbetrieb. Bei Fahrzeugen, die der EURO V Abgasnorm entsprechend mit SCR-Technik die NOx-Emission über eine Harnstoffinjektion in den Abgastrakt reduzieren, muss daher die Harnstoffdosierung entsprechend dem Gasanteil an der Gesamtkraftstoffmenge variiert werden. Hierfür wird eine zusätzlich Regelung verwendet.at Failure of the gas system is automatically the transition to pure diesel operation. Operation with LPG is therefore an additional Option to save fuel, but at any time by pure Diesel operation can be replaced. The addition of gas changes the NOX emission compared pure diesel operation. For vehicles that comply with the EURO V emission standard with SCR technology, the NOx emission via a urea injection In the exhaust tract, therefore, must reduce the urea dosing varies according to the proportion of gas in the total amount of fuel become. Therefor will be an additional Regulation used.

Bisher auf dem Markt befindliche Systeme unterscheiden sich von der Erfindung:
Sie arbeiten mit einem Verdampfer und bringen das Gas vor dem Turbolader ein. Hieraus folgen zwei wesentliche Nachteile:
Die Reaktion auf schnelle Laständerungen ist wegen des großen Gasvolumens, das sich im Umlauf befindet, sehr langsam und wird damit den Anforderungen an einen sicheren Betrieb nur ungenügend gerecht.Previously available systems differ from the invention:
They work with an evaporator and inject the gas in front of the turbocharger. This results in two major disadvantages:
The response to rapid load changes is very slow because of the large volume of gas that is circulating and thus does not sufficiently meet the requirements for safe operation.

Das große im Umlauf befindliche Gasvolumen kann zu unerwünschten Überleistungen und damit zu erhöhten Temperaturbelastungen führen.The size circulating gas volume can lead to unwanted excess power and thus increased Temperature loads lead.

Die Nutzung der Verdampfungsenthalpie und die damit verbundene Ladeluftkühlung entfällt. Eine Möglichkeit erheblicher Leistungssteigerung und höherer Effizienz wird damit verschenkt.The use of the enthalpy of vaporization and the associated charge air cooling is eliminated. A possibility of considerable increase in performance and higher efficiency is given away.

Es wird nur eine sehr einfache Regelung für die Gaszufuhr verwendet, die in so stark vereinfachter Weise mit der Motorsteuerung kommuniziert, dass eine hinreichend exakte Regelung über den gesamten Leistungsbereich nicht möglich ist.It only a very simple regulation for the gas supply is used, which communicates in such a simplified way with the engine control that a sufficiently precise regulation over the entire power range not possible is.

Nachfolgend wird die Erfindung anhand eines Ausführungsbeispiels beschrieben, das in der Zeichnung dargestellt ist.following the invention will be described with reference to an embodiment, which is shown in the drawing.

Die Figur zeigt einen schematischen Aufbau eines Verbrennungsmotors nach der Erfindung.The FIG. 1 shows a schematic structure of an internal combustion engine according to the invention.

Der Verbrennungsmotor umfasst in bekannter Weise einen Zylinder 10, einen Kolben 12 einen Brennraum 14, ein Einlassventil 16, ein Auslassventil 18, einen Ansagtrakt 20, einen Abgastrakt 22, und eine Kraftstoffeinspritzanlage mit einer Hochdruckpumpe 26, einem Ventil 28 und einer Einspritzdüse 30. Die Kraftstoffeinspritzanlage bezieht flüssigen Kraftstoff, vorzugsweise Diesel, aus einem Tank 24. Die Hochdruckpumpe 26 und das Ventil 28 sind über Steuerleitungen von einem Rechner 40 anhand von Motorparametern wie Last und Drehzahl an einer Eingangsleitung 42 gesteuert. Im Ansaugtrakt 20 ist ferner ein Turbolader 38 angeordnet, der angesaugte Verbrennungsluft verdichtet.The internal combustion engine comprises a cylinder in a known manner 10 , a piston 12 a combustion chamber 14 , an inlet valve 16 , an outlet valve 18 , an announcement tract 20 , an exhaust tract 22 , and a fuel injection system with a high-pressure pump 26 , a valve 28 and an injection nozzle 30 , The fuel injection system draws liquid fuel, preferably diesel, from a tank 24 , The high pressure pump 26 and the valve 28 are via control lines from a computer 40 based on engine parameters such as load and speed on an input line 42 controlled. In the intake tract 20 is also a turbocharger 38 arranged, the compressed combustion air compressed.

Weiter umfasst der Verbrennungsmotor eine Flüssiggaseinspritzanlage, bestehend aus einer Pumpe 34 und einer Flüssiggaseinspritzdüse 36. Die Flüssiggaseinspritzanlage bezieht flüssiges Gas aus einem Gasbehälter 32. Die Flüssiggaseinspritzdüse 36 mündet in den Ansaugtrakt 20 zwischen dem Turbolader 38 und dem Brennraum 14. Die Pumpe 34 wird ebenfalls vom Rechner 40 gesteuert. Flüssiggas gelangt somit im flüssigen Zustand in den Ansaugtrakt 20 und mischt sich hinter dem Turbolader 38 mit der komprimierten Verbrennungsluft. Das in den Brennraum gedrückte Luft-Gas-Gemisch wird nach Kompression durch über die Einspritzdüse 30 zugeführten Dieselkraftstoff gezündet, da dieser einen geringeren Flammpunkt als das Luft-Gas-Gemisch hat.Furthermore, the internal combustion engine comprises a liquid gas injection system, consisting of a pump 34 and a liquid gas injection nozzle 36 , The LPG injection system draws liquid gas from a gas container 32 , The LPG injector 36 flows into the intake tract 20 between the turbocharger 38 and the combustion chamber 14 , The pump 34 is also from the computer 40 controlled. Liquefied gas thus enters the intake tract in the liquid state 20 and mixes behind the turbocharger 38 with the compressed combustion air. The pressed into the combustion chamber air-gas mixture is after compression through the injector 30 supplied diesel fuel ignited because it has a lower flash point than the air-gas mixture.

Zur Reduktion von Stickstoffoxid im Abgas wird über eine Einspritzanlage aus einer Pumpe 46 und einer Düse 48 eine Harnstofflösung aus einem Vorratsbehälter 44 in den Abgastrakt 22 eingespritzt. Auch die Pumpe 46 ist vom Rechner gesteuert. Die zugesetzte Harnstoffmenge wird abhängig vom Gasanteil an der gesamten Kraftstoffmenge gesteuert.For the reduction of nitrogen oxide in the exhaust gas is via an injection system from a pump 46 and a nozzle 48 a urea solution from a reservoir 44 in the exhaust tract 22 injected. Also the pump 46 is controlled by the computer. The added amount of urea is controlled depending on the proportion of gas in the total amount of fuel.

Claims (4)

Verbrennungsmotor, umfassend wenigstens einen Brennraum, eine Kraftstoffeinspritzanlage, deren Einspritzdüsen in den wenigstens einen Brennraum münden, einen mit dem Brennraum verbundenen Luftansaugtrakt, in dem ein Lader angeordnet ist, eine Gaszufuhranlage, deren Ausgang in den Luftansaugtrakt mündet, und einen Abgastrakt, dadurch gekennzeichnet, dass die Gaszufuhranlage als Flüssiggaseinspritzanlage ausgebildet ist, deren Einspritzdüse zwischen dem Lader und dem Brennraum in den Luftansaugtrakt mündet.An internal combustion engine comprising at least one combustion chamber, a fuel injection system, the injection nozzles of which open into the at least one combustion chamber, an air intake tract connected to the combustion chamber, in which a supercharger is arranged, a gas supply system whose outlet opens into the air intake tract, and an exhaust gas tract, characterized that the gas supply system is designed as a liquid injection system, the injection nozzle opens between the supercharger and the combustion chamber in the air intake tract. Verbrennungsmotor nach Anspruch 1, dadurch gekennzeichnet, dass die Flüssiggaseinspritzanlage eine drehzahl- und lastabhängige Steuerung oder Regelung umfasst.Internal combustion engine according to claim 1, characterized that the LPG injection system a speed and load dependent Control includes. Verbrennungsmotor nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass eine Harnstoffeinspritzanlage vorgesehen ist, deren Einspritzdüse in den Abgastrakt mündet.Internal combustion engine according to claim 1 or 2, characterized characterized in that a urea injection system is provided, their injection nozzle flows into the exhaust tract. Verbrennungsmotor nach Anspruch 1, dadurch gekennzeichnet, dass die Harnstoffeinspritzanlage eine vom Flüssiggasanteil der Gesamtkraftstoffmenge abhängige Steuerung oder Regelung umfasst.Internal combustion engine according to claim 1, characterized that the urea injection system one of the LPG content of the total amount of fuel dependent Control includes.
DE102009023674A 2009-06-03 2009-06-03 Internal combustion engine e.g. diesel engine, for use in e.g. passenger car, has gas supply system including liquefied gas fuel injector leading between turbocharger and combustion chamber in air inlet conduit Withdrawn DE102009023674A1 (en)

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