DE20310824U1 - Internal combustion engine for a motor vehicle has high-pressure fuel injection of liquid fuel mixture through a high-pressure fuel pump and high-pressure injection valves - Google Patents

Internal combustion engine for a motor vehicle has high-pressure fuel injection of liquid fuel mixture through a high-pressure fuel pump and high-pressure injection valves Download PDF

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DE20310824U1
DE20310824U1 DE20310824U DE20310824U DE20310824U1 DE 20310824 U1 DE20310824 U1 DE 20310824U1 DE 20310824 U DE20310824 U DE 20310824U DE 20310824 U DE20310824 U DE 20310824U DE 20310824 U1 DE20310824 U1 DE 20310824U1
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pressure
fuel
internal combustion
combustion engine
injection
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Classifications

    • 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
    • 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
    • F02M21/0245—High pressure fuel supply systems; Rails; Pumps; Arrangement of valves
    • 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
    • F02M43/00—Fuel-injection apparatus operating simultaneously on two or more fuels, or on a liquid fuel and another liquid, e.g. the other liquid being an anti-knock additive
    • 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
    • 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
    • F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/02—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 gaseous fuels
    • F02D19/021—Control of components of the fuel supply system
    • F02D19/022—Control of components of the fuel supply system to adjust the fuel pressure, temperature or composition
    • 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
    • F02D19/02—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 gaseous fuels
    • F02D19/026—Measuring or estimating parameters related to the fuel supply system
    • F02D19/027—Determining the fuel pressure, temperature or volume flow, the fuel tank fill level or a valve position
    • 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
    • F02M21/0203—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels characterised by the type of gaseous fuel
    • F02M21/0209—Hydrocarbon fuels, e.g. methane or acetylene
    • F02M21/0212—Hydrocarbon fuels, e.g. methane or acetylene comprising at least 3 C-Atoms, e.g. liquefied petroleum gas [LPG], propane or butane
    • 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
    • F02M21/0203—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels characterised by the type of gaseous fuel
    • F02M21/0215—Mixtures of gaseous fuels; Natural gas; Biogas; Mine gas; Landfill gas
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/31—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements
    • F02M2200/315—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements for damping fuel pressure fluctuations
    • 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
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M41/00—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor
    • 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
    • F02M53/00—Fuel-injection apparatus characterised by having heating, cooling or thermally-insulating means
    • 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
    • F02M57/00—Fuel-injectors combined or associated with other devices
    • 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

A pressurized pressure-tight tank (10) for liquid gas has corresponding armatures. Fuel is poured in the tank via a filling line (11), either well pre-mixed or in desired proportions. Low-pressure fuel is poured in at a pressure above vaporized pressure for medium-pressure fuel, i.e. butane. Return valves (2) prevent fuel (18) reflux.

Description

Die Erfindung geht aus von einer Verbrennungskraftmaschine mit Hochdruckeinspritzung eines Kraftstoffgemisches durch eine Kraftstoffhochdruckpumpe und Hochdruckeinspritzventile, das zum einen aus Kraftstoffen besteht, die bei Normaldruck und Normaltemperatur flüssig sind (Niederdruckkraftstoff) und zum anderen aus Kraftstoffen, die eines relativ geringen Druckes bedürfen um flüssig gespeichert werden zu können (Mitteldruckkraftstoff) und mit einer oder mehreren, in Reihe geschalteten, Niederdruckkraftstoffpumpen, die das Kraftstoffgemisch zu der Hochdruckpumpe fördern.The The invention is based on an internal combustion engine with high-pressure injection a fuel mixture by a high pressure fuel pump and High-pressure injection valves, which on the one hand consists of fuels, which are liquid at normal pressure and temperature (low pressure fuel) and secondly from fuels that have a relatively low pressure need to be fluid to be able to be saved (Medium pressure fuel) and with one or more series-connected Low pressure fuel pumps that deliver the fuel mixture to the high pressure pump promote.

Mitteldruckkraftstoffe sind Kraftstoffe, wie z.B. Flüssiggas auch Autogas oder LPG bezeichnet, die eines relativ geringen Überdruckes bedürfen um bei Normaltemperatur in flüssigem Zustand in einem druckfesten Tank gespeichert werden können.Medium pressure fuels are fuels such as LPG also called LPG or LPG, which has a relatively low overpressure need to at normal temperature in liquid Condition can be saved in a pressure-resistant tank.

Niederdruckkraftstoffe sind Kraftstoffe, wie z.B. Benzin, Diesel, Pflanzenöl, die bei Normaldruck und Normaltemperatur flüssig sind und keines Überdruckes zur Speicherung bedürfen.Low pressure fuels are fuels such as Gasoline, diesel, vegetable oil, which at Normal pressure and normal temperature are liquid and no overpressure need for storage.

Gasförmige Kraftstoffe wie LPG oder CNG versprechen bei Verwendung in einer Brennkraftmaschine, die nach dem Selbstzündungsverfahren betrieben wird, eine Reduzierung der Schadstoffrohemissionen bei niedrigen Kosten und ohne Verlust an Leistung. In der Literatur wird bei einer Zumischung von 73% Naturgas als Kraftstoff eine NOx-Reduktion von 24% festgestellt bei einer leicht verbesserten thermischen Effizienz gegenüber dem reinen Dieselkraftstoff.Gaseous fuels like LPG or CNG promise when used in an internal combustion engine, after the auto-ignition process is operated, a reduction in raw emissions low cost and no loss of performance. In the literature With an admixture of 73% natural gas as fuel, a NOx reduction of 24% found with slightly improved thermal efficiency across from the pure diesel fuel.

Durch die Einspritzung eines Kraftstoffgemisches von Kraftstoffes unterschiedlicher Eigenschaften wird versucht den Gleichdruckverbrennungprozeß bei der dieselmotorischen Verbrennung mit der Gleichraumverbrennung des Otto-Motors zu kombinieren, um daraus Vorteile hinsichtlich Leistung und bei der Emission von Schadstoffen zu gewinnen.By the injection of a fuel mixture of different fuel Properties will try the constant pressure combustion process at the diesel engine combustion with the same space combustion of the Otto engines to combine to get benefits in terms of performance and gain in the emission of pollutants.

Ein eigener Vorversuch ergab bei einer Zumischung von Flüssiggas zu Dieselkraftstoff eine Drehmomentsteigerung von 230 Nm auf 350 Nm bei einer gleichzeitigen Reduzierung des die Emission von Rußpartikeln repräsentierenden k-Wertes von 0,53 auf 0,23.On own preliminary test showed an admixture of liquid gas a torque increase from 230 Nm to 350 for diesel fuel Nm while reducing the emission of soot particles representing k value from 0.53 to 0.23.

Eine derartige Verbrennungskraftmaschine ist aus dem Japanischen Patent 59162337 A bekannt.A such internal combustion engine is from the Japanese patent 59162337 A known.

Das Patent beschreibt eine Verbrennungskraftmaschine die nach dem Dieselprinzip arbeitet und zwei Kraftstofftanks aufweist, einen für Flüssiggas (LPG = Liquified petroleum gas – ein Gemisch aus Propan und Butan) und einen für den Dieselkraftstoff. Aus beiden Tanks wird der jeweilige Kraftstoff unter Druck zu einer Mischkammer gefördert, wo sie gemischt und anschließend mittels einer Hochdruckpumpe und Einspritzventilen direkt in den Zylinder eines Dieselmotors eingespritzt werden.The Patent describes an internal combustion engine based on the diesel principle works and has two fuel tanks, one for LPG (LPG = Liquified petroleum gas - a Mixture of propane and butane) and one for the diesel fuel. Out In both tanks, the respective fuel becomes one under pressure Conveying chamber promoted, where they mixed and then by means of a high pressure pump and injection valves directly into the Cylinders of a diesel engine are injected.

Nachteilig bei dieser Ausführung ist der Aufwand an Bauteilen der nötig ist, um der Hochdruckpumpe das gewünschte Kraftstoffgemisch zuzuführen.adversely in this version is the amount of components required to make the high pressure pump the wished Add fuel mixture.

Ein weiterer Nachteil dieser Ausführung ist die Verwendung von Flüssiggas. Bei den hohen Temperaturen, die bei modernen dieselmotorischen Verbrennungskraftmaschinen im Einspritzbereich auftreten besteht die große Gefahr, dass der Propananteil im Flüssiggas die kritische Temperatur überschreitet und verdampft.On Another disadvantage of this version is the use of liquefied petroleum gas. At the high temperatures in modern diesel engine internal combustion engines occur in the injection area there is a great risk that the propane content in the LPG exceeds the critical temperature and evaporated.

Ebenfalls ein Nachteil ist die Beschränkung auf den Kraftstoff Diesel und den dieselmotorischen Verbrennungsprozess. Diese Nachteile werden durch die oben beschriebenen Schutzansprüche der Erfindung vermieden.Likewise one disadvantage is the limitation to the fuel diesel and the diesel engine combustion process. These disadvantages are covered by the protection claims of the invention described above avoided.

Indem die gewünschte Kraftstoffinischung schon bei oder vor dem Tanken erzeugt wird. verlagert sich der Mischungsprozess aus dem Kraftstoffzuführungsprozess. Dadurch vereinfacht sich der Aufbau der Kraftstoffzuführung zu dem Verbrennungsmotor erheblich. Durch die Nutzung der Komponente Butan an Stelle von Flüssiggas werden gleichzeitig die zu beherrschenden Drücke im Niederdrucksystem der Kraftstoffzuführung reduziert und, noch wichtiger, das Problem der Überschreitung der kritischen Temperatur eines Kraftstoffanteils auf dem Weg durch die Einspritzprozesskette zum Brennraum vermieden; denn Butan besitzt die kritische Temperatur von 152,1 °C bei einem kritischen Druck von 38,1 bar gegenüber der kritischen Temperatur von 96,8 °C und dem kritischen Druck von 42,6 bar von Propan.By doing the desired Fuel mixture is generated during or before refueling. the mixing process shifts from the fuel supply process. This simplifies the structure of the fuel supply the internal combustion engine considerably. By using the component Butane instead of liquid gas the pressures to be controlled in the low pressure system of the Fuel supply reduced and, more importantly, the problem of exceeding the critical Temperature of a fuel fraction on its way through the injection process chain avoided to the combustion chamber; because butane has the critical temperature of 152.1 ° C at a critical pressure of 38.1 bar compared to the critical temperature of 96.8 ° C and the critical pressure of 42.6 bar of propane.

Zusätzlich ist es auch möglich, direkteinspritzende Ottomotoren mit dieser Kraftstoffzuführungskonfiguration zu betreiben. In 1 ist eine bevorzugte Ausführung der Erfindung schematisch dargestellt.In addition, it is also possible to operate direct-injection gasoline engines with this fuel supply configuration. In 1 a preferred embodiment of the invention is shown schematically.

Sie zeigt einen Drucktank 10 für Flüssiggas mit den entsprechenden Armaturen, von denen aber nur die hier benötigten dargestellt sind. Über die Füllleitung 11 werden die Kraftstoffe in den druckfesten Tank 10 eingefüllt, entweder schon vorgemischt oder in den gewünschten Anteilen nacheinander. Voraussetzung dabei ist, dass auch der Niederdruckkraftstoff mit einem Druck eingefüllt wird, der über dem Dampfdruck des Mitteldruckkraftstoffes, hier Butan, liegt. Rückschlagventile 2 verhindern eine Rückströmen des Kraftstoffes 18.It shows a pressure tank 10 for liquefied petroleum gas with the appropriate fittings, of which only the ones required are shown. Via the filling line 11 the fuels in the pressure-resistant tank 10 filled, either pre-mixed or in the desired proportions one after the other. The prerequisite for this is that the low-pressure fuel is also filled with a pressure that is above the vapor pressure of the medium-pressure fuel, here butane. check valves 2 prevent backflow men of fuel 18 ,

Eine Kraftstoffpumpe 1 drückt das Kraftstoffgemisch 18 aus dem Drucktank 10 über einen Filter 6 und, falls nötig, eine weitere Kraftstoffpumpe 4 zum Eingang der Hochdruckpumpe 5. Eine Kühlung des Kraftstoffes kann, falls nötig oder sinnvoll, vor oder hinter der Hochdruckpumpe 5 über einen Kraftstoffkühler 9 erfolgen. Messfühler 15, 16 und 17 messen die Kraftstofftemperatur. Die Messwerte werden in der Regelung 27 verarbeitet und gegebenenfalls startet die Regelung 27 den Kühlprozess.A fuel pump 1 presses the fuel mixture 18 from the pressure tank 10 through a filter 6 and, if necessary, another fuel pump 4 to the input of the high pressure pump 5 , If necessary or sensible, the fuel can be cooled in front of or behind the high-pressure pump 5 via a fuel cooler 9 respectively. probe 15 . 16 and 17 measure the fuel temperature. The measured values are in the control 27 processed and the control starts if necessary 27 the cooling process.

Die Hochdruckpumpe 5 drückt den Kraftstoff, je nachdem welches Einspritzsystem vorliegt, ob Common-Rail, Pumpe-Düse, Pumpe-Leitung-Düse, Verteiler- oder Reiheneinspritzpumpe mit dem systemtypischen Druck entweder direkt oder über die Speicherleiste zu den (hier nicht gezeigten) Einspritzdüsen. Ein Hochdruckregler 8 sorgt für den konstanten Hochdruck. Hier abgebildet ist ein Common-Rail-System mit einer Speicherleiste 7 und einem Hochdruckregler 8.The high pressure pump 5 presses the fuel, depending on which injection system is present, whether common rail, pump nozzle, pump line nozzle, distributor or in-line injection pump with the system-typical pressure either directly or via the storage bar to the injection nozzles (not shown here). A high pressure regulator 8th ensures constant high pressure. A common rail system with a memory strip is shown here 7 and a high pressure regulator 8th ,

Der Kraftstoffrücklauf 19 wird aus Gründen der Kühlung und der Entlüftung vorzugsweise in den Kraftstofftank 10 zurückgeführt. In den Rücklauf 19 eingebunden ist in einer bevorzugten Ausführung ein Druckregler für den Niederdruckkreislauf 14, der in einer bevorzugten Ausführung durch eine Rückkoppelungsleitung 13 eine weitere Druckerhöhung erzielt. Der Druckregler 14 erfüllt gleichzeitig die Funktion eines Druckdämpfers.The fuel return 19 is preferably in the fuel tank for reasons of cooling and ventilation 10 recycled. In the return 19 In a preferred embodiment, a pressure regulator for the low-pressure circuit is integrated 14 which, in a preferred embodiment, is provided by a feedback line 13 achieved a further pressure increase. The pressure regulator 14 also fulfills the function of a pressure damper.

Claims (2)

Verbrennungskraftmaschine mit Hochdruckeinspritzung eines flüssigen Kraftstoffgemisches durch eine Kraftstoffhochdruckpumpe und Hochdruckeinspritzventile, das zum einen aus Kraftstoffen besteht, die bei Normaldruck und Normaltemperatur flüssig sind (Niederdruckkraftstoff) und zum anderen aus Kraftstoffen, die eines relativ geringen Druckes bedürfen um flüssig gespeichert werden zu können (Mitteldruckkraftstoff) und mit einer oder mehreren, in Reihe geschalteten, Niederdruckkraftstoffpumpen, die das Kraftstoffgemisch zu der Hochdruckpumpe fördern und, falls notwendig, mit einer Druckregelung ausgestattet, die den Kraftstoffdruck am Eingang zu der Hochdruckpumpe konstant hält dadurch gekennzeichnet, dass das einzuspritzende Kraftstoffgemisch in einem gemeinsamen druckfesten Kraftstofftank bevorratet ist.Internal combustion engine with high-pressure injection of a liquid fuel mixture by means of a high-pressure fuel pump and high-pressure injection valves, which on the one hand consists of fuels that are liquid at normal pressure and normal temperature (low-pressure fuel) and on the other hand from fuels that require a relatively low pressure in order to be stored in liquid form (medium-pressure fuel) and equipped with one or more low-pressure fuel pumps connected in series, which deliver the fuel mixture to the high-pressure pump and, if necessary, with a pressure control that keeps the fuel pressure at the inlet to the high-pressure pump constant, characterized in that the fuel mixture to be injected is in a common pressure-resistant Fuel tank is stored. Verbrennungskraftmaschine nach Anspruch 1 dadurch gekennzeichnet, dass als Mitteldruckkraftstoff im Kraftstoffgemisch ein Butangemisch genutzt wird, wenn die Gefahr besteht, dass im Normalbetrieb der Verbrennungskraftmaschine im Kraftstoffzuführungssystem die kritische Temperatur von Propan von 96,8 °C erreicht oder überschritten wird.Internal combustion engine according to claim 1 thereby characterized that as a medium pressure fuel in the fuel mixture a butane mixture is used if there is a risk that the Normal operation of the internal combustion engine in the fuel supply system the critical temperature of propane reached or exceeded 96.8 ° C becomes.
DE20310824U 2003-07-14 2003-07-14 Internal combustion engine for a motor vehicle has high-pressure fuel injection of liquid fuel mixture through a high-pressure fuel pump and high-pressure injection valves Expired - Lifetime DE20310824U1 (en)

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Cited By (9)

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EP1785618A1 (en) * 2005-11-13 2007-05-16 Karlheinrich Winkelmann Fuel cooling system for internal combustion engines
WO2009023887A1 (en) * 2007-08-20 2009-02-26 Robert Bosch Gmbh Method and device for injecting fuel into the combustion chamber of an internal combustion engine
DE102007051677A1 (en) 2007-10-26 2009-04-30 Karlheinrich Winkelmann Fuel e.g. petrol, mixture controlled production and conveying method for e.g. Otto-engine, involves supplying fuel mixture in fuel mixture tank into high pressure fuel device, pressure rail, fuel injection valve, fuel loop and control unit
EP2069627A1 (en) * 2006-09-25 2009-06-17 DGC Industries PTY LTD A dual fuel system
DE102008053873A1 (en) * 2008-10-30 2010-05-06 Winkelmann, Karlheinrich, Dipl.-Ing. (TH) Internal combustion engine i.e. petrol engine, operating method for motor vehicle, involves adjusting evaporation pressure of fluid phase with turned-off engine at operating temperature in evaporation-critical position for starting engine
DE102010024635A1 (en) * 2010-06-22 2011-12-22 A. Luhmann Gmbh Brennstoffzumesseinrichtung for an internal combustion engine
ITCE20100010A1 (en) * 2010-08-03 2012-02-04 Ottavio Pennacchia LPG-GASOLINE MIXTURE SUPPLY SYSTEMS FOR DIRECT-INJECTION IGNITION-BASED ENGINES FOR ROAD TRACTION, NAVAL PROPULSION OR ENERGY PRODUCTION
ITVI20120186A1 (en) * 2012-07-27 2014-01-28 Brumgas S R L LPG SUPPLY SYSTEM FOR INTERNAL COMBUSTION ENGINES
CN103814204A (en) * 2011-09-28 2014-05-21 三菱重工业株式会社 Direct fuel injection diesel engine apparatus

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EP2069627A1 (en) * 2006-09-25 2009-06-17 DGC Industries PTY LTD A dual fuel system
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WO2009023887A1 (en) * 2007-08-20 2009-02-26 Robert Bosch Gmbh Method and device for injecting fuel into the combustion chamber of an internal combustion engine
US8708247B2 (en) 2007-08-20 2014-04-29 Robert Bosch Gmbh Method and device for injecting fuel into the combustion chamber of an internal combustion engine
DE102007051677A1 (en) 2007-10-26 2009-04-30 Karlheinrich Winkelmann Fuel e.g. petrol, mixture controlled production and conveying method for e.g. Otto-engine, involves supplying fuel mixture in fuel mixture tank into high pressure fuel device, pressure rail, fuel injection valve, fuel loop and control unit
DE102008053873A1 (en) * 2008-10-30 2010-05-06 Winkelmann, Karlheinrich, Dipl.-Ing. (TH) Internal combustion engine i.e. petrol engine, operating method for motor vehicle, involves adjusting evaporation pressure of fluid phase with turned-off engine at operating temperature in evaporation-critical position for starting engine
DE102010024635A1 (en) * 2010-06-22 2011-12-22 A. Luhmann Gmbh Brennstoffzumesseinrichtung for an internal combustion engine
WO2011160830A1 (en) 2010-06-22 2011-12-29 A. Luhmann Gmbh Fuel metering device for an internal combustion engine
ITCE20100010A1 (en) * 2010-08-03 2012-02-04 Ottavio Pennacchia LPG-GASOLINE MIXTURE SUPPLY SYSTEMS FOR DIRECT-INJECTION IGNITION-BASED ENGINES FOR ROAD TRACTION, NAVAL PROPULSION OR ENERGY PRODUCTION
CN103814204A (en) * 2011-09-28 2014-05-21 三菱重工业株式会社 Direct fuel injection diesel engine apparatus
ITVI20120186A1 (en) * 2012-07-27 2014-01-28 Brumgas S R L LPG SUPPLY SYSTEM FOR INTERNAL COMBUSTION ENGINES

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