EP0071053A2 - Method of preheating fuel for an internal-combustion engine working with heavy fuel, and fuel system therefor - Google Patents

Method of preheating fuel for an internal-combustion engine working with heavy fuel, and fuel system therefor Download PDF

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Publication number
EP0071053A2
EP0071053A2 EP82106067A EP82106067A EP0071053A2 EP 0071053 A2 EP0071053 A2 EP 0071053A2 EP 82106067 A EP82106067 A EP 82106067A EP 82106067 A EP82106067 A EP 82106067A EP 0071053 A2 EP0071053 A2 EP 0071053A2
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EP
European Patent Office
Prior art keywords
fuel
filter
supply system
heavy
clean room
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Granted
Application number
EP82106067A
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German (de)
French (fr)
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EP0071053B1 (en
EP0071053A3 (en
Inventor
Emil Boemer
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Kloeckner Humboldt Deutz AG
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Kloeckner Humboldt Deutz AG
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Application filed by Kloeckner Humboldt Deutz AG filed Critical Kloeckner Humboldt Deutz AG
Priority to AT82106067T priority Critical patent/ATE34808T1/en
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    • 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
    • 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
    • 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
    • F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
    • F02M37/30—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by heating means

Definitions

  • the invention relates to a fuel preheating method for internal combustion engines with heavy oil operation and a fuel system therefor, with a fuel delivery pump that draws preheated fuel from a fuel supply system, with a fuel filter connected downstream of the fuel delivery pump, and with a fuel injection system that is supplied with filtered fuel.
  • the invention has for its object to provide a fuel preheating process for internal combustion engines of the type mentioned, which makes it possible to start with pure fuel oil operation with a simple preheating device, in particular while protecting the fuel filter from impermissible pressures.
  • the fuel feed pump pumps fuel from the fuel supply system through the dirty space of the fuel filter, the fuel in the clean room of the fuel filter being heated to flowability by the fuel flowing past.
  • this can be done by shutting off the Return line from the dirty room to the fuel supply system or more simply by grading the cross-sections between the larger clean room and smaller dirty room outflows.
  • the operability of the fuel filter and the entire fuel system is thus established without additional heat supply devices being required in addition to a known preheating element in the fuel supply system, which should advantageously be arranged in the vicinity of the fuel feed pump. If the warming-up phase, during which the bulk of the fuel is conveyed only through the dirty space, is to be ended by an automatic control, this can preferably be done as a function of temperature or pressure.
  • a system suitable for carrying out the above-mentioned method with a customary preheating device for the heavy oil in the fuel supply system in front of the fuel feed pump is characterized in that the fuel filter has a dirty space with an inflow and an outflow and a clean room with another outflow, the dirty space on the inflow side with the pressure side the fuel feed pump and on the discharge side is connected to the fuel supply system - in front of a preheating device, while the discharge from the clean room leads to the fuel injection system.
  • shut-off device is provided in the drain from the dirty space, which can be designed as a pressure-maintaining valve or thermostatic valve, but can also be controlled independently in a version as a simple shut-off valve.
  • FIG. 1 and 2 each show a fuel filter 1 with a housing provided with a lid and a filter insert 5 in section.
  • the housing has an axial inflow 2 to the dirt chamber 8 and a radial outlet 3 from the dirt chamber 8 and a coaxial outlet 7 from the clean room 9 in the interior of the filter insert 5.
  • a return line 6 with a shut-off device 4 connects to the drain 3 from the clean room 9.
  • the shut-off device 4 is open. Only the dirt chamber 8 is flowed through from the inflow 2 to the outflow 3, while the fuel inside the filter insert 5 is still solid or viscous. After this fuel has been heated by the preheated fuel flowing past, the shut-off device 4 is closed and the fuel flows through the surface of the filter insert 5 via the drain 7 in the direction of the fuel injection system.
  • FIG. 3 shows a fuel tank 18 with a heating device 19, to which the suction side of a fuel feed pump 11 is connected via an intake line 10.
  • the pressure side of the fuel delivery pump 11 is connected to a fuel injection pump 14 via a delivery line, in which a fuel filter 1 is inserted.
  • An additional heating device 13 is arranged in the delivery line 12, which does not necessarily have to be present, but is advantageous in the case of long delivery lines for improved flowability of the fuel.
  • the delivery line 12 is connected on the one hand to the inflow 2 to the dirt chamber 8 and on the other hand to the outlet 7 from the clean room of the fuel filter.
  • a return line 6 to the fuel tank 8 connects to the drain 4 from the dirt chamber 8 of the fuel filter 1, into which a shut-off element 4 is inserted.
  • Individual injection lines 15 and a return line 16 extend from the fuel injection pump 14. In the return line 16, which opens into the return line 6 from the fuel filter 1, a pressure control valve 17 is used. The latter two lines 6, 16 can also be routed separately to the fuel tank 18.
  • the fuel tank 18 with the heating device 19, the fuel delivery pump 11 and the additional heating device 11 are generally arranged on the system side away from the internal combustion engine, while the other modules shown are arranged directly on the latter.

Abstract

1. A method of preheating fuel in an internal combustion engine operable with heavy fuel, in which a fuel feed pump (11) draws preheated heavy fuel from a fuel reservoir (18) and feeds through a downstream-arranged filter (1) the thus filtered heavy fuel to fuel injection equipment (14, 15), and in which during a warming-up stage preceding the start of the engine the feed pump (11) pumps the heavy fuel from the reservoir (18) to the filter (1) and hence through a blockable return duct (6) back to the reservoir (18), characterized in that during the warming-up stage the heavy fuel is pumped through the filter's catch chamber (8) until the heavy fuel in the filter's (1) purified-fuel chamber (9) has been heated by the passing preheated heavy fuel to an extent sufficient to render it flowable, and in that the return duct (6) between the catch chamber (8) and the reservoir (18) is substantially blocked once the fuel in the purified-fuel chamber (9) has reached a predetermined viscosity.

Description

Die Erfindung betrifft ein Brennstoffvorwärmverfahren für Brennkraftmaschinen mit Schwerölbetrieb und ein Brennstoffsystem hierfür, mit einer Brennstofförderpumpe, die aus einem Brennstoffvorratssystem vorgewärmten Brennstoff ansaugt, mit einem der Brennstofförderpumpe nachgeschalteten Brennstoffilter und mit einem Brennstoffeinspritzsystem, das mit gefiltertem Brennstoff versorgt wird.The invention relates to a fuel preheating method for internal combustion engines with heavy oil operation and a fuel system therefor, with a fuel delivery pump that draws preheated fuel from a fuel supply system, with a fuel filter connected downstream of the fuel delivery pump, and with a fuel injection system that is supplied with filtered fuel.

Bei Brennstoffvorwärmverfahren der genannten Art ist es allgemein bekannt, vor dem Abstellen der Brennkraftmaschine von Schweröl- auf Gasölbetrieb umzustellen, um beim Start im Brennstoffzuführungs-, Brennstoffilter- und Brennstoffeinspritzsystem einen fließfähigen Brennstoff bereit zu haben, wenn die Vorwärmung des Schweröls nur vor diesen Systemteilen stattfindet. Dies macht in nachteiliger Weise einen hohen Aufwand für zwei unabhängige Brennstoffvorratssysteme mit entsprechenden Steuerungsteilen erforderlich.In fuel preheating methods of the type mentioned, it is generally known to switch from heavy oil to gas oil operation before the internal combustion engine is switched off, in order to have a flowable fuel ready in the fuel supply, fuel filter and fuel injection system when the preheating of the heavy oil takes place only in front of these system parts . In a disadvantageous manner, this requires a high outlay for two independent fuel supply systems with corresponding control parts.

Bei Brennkraftmaschinen mit reinem Schwerölbetrieb ohne Umstellmöglichkeit ist dagegen ein erhöhter Aufwand an Heizeinrichtungen, insbesondere an den engmaschigen und empfindlichen Brennstoffiltern notwendig.In the case of internal combustion engines with pure heavy oil operation without the possibility of conversion, on the other hand, increased expenditure on heating devices, in particular on the close-meshed and sensitive fuel filters, is necessary.

Der Erfindung liegt die Aufgabe zugrunde, für Brennkraftmaschinen der genannten Art ein Brennstoffvorwärmverfahren anzubieten, welches bei reinem Schwerölbetrieb mit einer einfachen Vorwärmeinrichtung einen Start insbesondere unter Schonung der Brennstoffilter vor unzulässigen Drücken möglich macht.The invention has for its object to provide a fuel preheating process for internal combustion engines of the type mentioned, which makes it possible to start with pure fuel oil operation with a simple preheating device, in particular while protecting the fuel filter from impermissible pressures.

Die Lösung hierfür besteht darin, daß in einer Anwärmphase vor dem Start die Brennstofförderpumpe Brennstoff aus dem Brennstoffvorratssystem durch den Schmutzraum des Brennstoffilters pumpt, wobei der Brennstoff im Reinraum des Brennstoffilters durch den vorbeiströmenden Brennstoff bis zur Fließfähigkeit erwärmt wird.The solution to this is that in a warm-up phase before the start, the fuel feed pump pumps fuel from the fuel supply system through the dirty space of the fuel filter, the fuel in the clean room of the fuel filter being heated to flowability by the fuel flowing past.

Durch dieses Verfahren wird unter Ansaugung von vorgewärmtem fließ- bzw. pumpfähigem Brennstoff eine geringe Menge kalten, zähen Schweröls von der Brennstoffförderpumpe über den Schmutzraum des Brennstofffilters zurück in das Brennstoffvorratssystem gepumpt, ohne daß das empfindliche Filterelement selber durchströmt wird. Durch das sofort nachströmende vorgewärmte und gut pumpfähige Schweröl, das danach von der Brennstofförderpumpe in einem Kreislauf umgewälzt wird, steht im Brennstoffilter ein Heizmittel zur Verfügung, das das Schweröl im Reinraum erwärmt und pumpfähig macht. Sobald dieses eine ausreichende Temperatur erreicht hat, fließt zumindest die Hauptmenge des geförderten Brennstoffs über das Filterelement zum Abfluß aus dem Reinraum. In zwei möglichen Ausführungen kann dies durch Absperren der Rückflußleitung aus dem Schmutzraum zum Brennstoffvorratssystem oder einfacher durch eine Abstufung der Querschnitte zwischen größerem Reinraum- und kleinerem Schmutzraum-Abfluß sichergestellt werden. Die Betriebsfähigkeit des Brennstoffilters und der ganzen Brennstoffanlage wird somit hergestellt, ohne daß außer einem bekannten Vorwärmelement im Brennstoffvorratssystem, das vorteilhafterweise in der Nähe der Brennstoff-Förderpumpe angeordnet sein sollte, zusätzliche Wärmezufureinrichtungen erforderlich sind. Sofern die Anwärmphase, während der die Hauptmenge des Brennstoffs nur über den Schmutzraum gefördert wird, durch eine automatische Steuerung beendet werden soll, so kann dies vorzugsweise temperatur- oder auch druckabhängig erfolgen.With this method, a small amount of cold, viscous heavy oil is pumped from the fuel feed pump through the dirty space of the fuel filter back into the fuel supply system, without the sensitive filter element itself being flowed through, while preheated flowable or pumpable fuel is sucked in. Due to the immediately flowing, preheated and easily pumpable heavy oil, which is then circulated by the fuel feed pump in a circuit, a heating medium is available in the fuel filter that heats the heavy oil in the clean room and makes it pumpable. As soon as it has reached a sufficient temperature, at least the majority of the fuel delivered flows through the filter element to the drain from the clean room. In two possible versions, this can be done by shutting off the Return line from the dirty room to the fuel supply system or more simply by grading the cross-sections between the larger clean room and smaller dirty room outflows. The operability of the fuel filter and the entire fuel system is thus established without additional heat supply devices being required in addition to a known preheating element in the fuel supply system, which should advantageously be arranged in the vicinity of the fuel feed pump. If the warming-up phase, during which the bulk of the fuel is conveyed only through the dirty space, is to be ended by an automatic control, this can preferably be done as a function of temperature or pressure.

Eine zur Durchführung des genannten Verfahrens geeignete Anlage mit einer üblichen Vorwärmeinrichtung für das Schweröl im Brennstoffvorratssystem vor der Brennstofförderpumpe ist dadurch gekennzeichnet, daß der Brennstoffilter einen Schmutzraum mit einem Zufluß und einem Abfluß und einen Reinraumnit einem weiteren Abfluß aufweist, wobei der Schmutzraum zuflußseitig mit der Druckseite der Brennstofförderpumpe und abflußseitig mit dem Brennstoffvorratssystem-vor einer Vorwärmeinrichtung verbunden ist, während der Abfluß aus dem Reinraum zum Brennstoffeinspritzsystem führt.A system suitable for carrying out the above-mentioned method with a customary preheating device for the heavy oil in the fuel supply system in front of the fuel feed pump is characterized in that the fuel filter has a dirty space with an inflow and an outflow and a clean room with another outflow, the dirty space on the inflow side with the pressure side the fuel feed pump and on the discharge side is connected to the fuel supply system - in front of a preheating device, while the discharge from the clean room leads to the fuel injection system.

Die Umsteuerung des in den Schmutzraum eintretenden Schweröls vom Abfluß aus dem Schmutzraum zum Abfluß aus dem Reinraum erfolgt nach Beendigung der Anwärmphase und Erwärmung des Schweröls im Reinraum. Bei einer Abstufung der Querschnitte fließt ständig eine geringe Teilmenge aus dem Schmutzraum zurück zum Brennstoffvorratssystem. Bei hierfür nicht ausreichender Fördermenge der Brennstofförderpumpe ist ein Absperrorgan im Abfluß aus dem Schmutzraum vorgesehen, das als Druckhalteventil oder Thermostatventil ausgeführt sein kann, jedoch in einer Ausführung als einfacher Absperrhahn auch unabhängig gesteuert sein kann.The reversal of the entering into the dirt area heavy oil from the effluent from the dirty room to drain from the clean room is done after completion of the warm-up and heating of the S c hweröls in the clean room. At a gradation of the cross-sections, a small amount flows continuously from the dirty space back to the fuel supply system. If the delivery rate of the fuel delivery pump is not sufficient for this purpose, a shut-off device is provided in the drain from the dirty space, which can be designed as a pressure-maintaining valve or thermostatic valve, but can also be controlled independently in a version as a simple shut-off valve.

Ausführungen der Erfindung zeigen die Zeichnungen.

  • Fig. 1 zeigt einen für das Verfahren und die Anordnung der Erfindung geeignetes Brennstoffilter in der Anwärmphase;
  • Fig. 2 zeigt ein Brennstoffilter nach Fig. 1 nach Beendigung der Anwärmphase;
  • Fig. 3 zeigt ein erfindungsgemäßes Brennstoffsystem in schematischer Darstellung.
Embodiments of the invention show the drawings.
  • 1 shows a fuel filter suitable for the method and the arrangement of the invention in the warming-up phase;
  • FIG. 2 shows a fuel filter according to FIG. 1 after the warm-up phase has ended;
  • Fig. 3 shows a fuel system according to the invention in a schematic representation.

In den Fig. 1 und 2 ist jeweils ein Brennstoffilter 1 mit einem mit Deckel versehenem Gehäuse und einem Filtereinsatz 5 im Schnitt gezeigt. Das Gehäuse weist einen axialen Zufluß 2 zum Schmutzraum 8 und einen radialen Abfluß 3 aus dem Schmutzraum 8 sowie einen koaxialen Abfluß 7 aus dem Reinraum 9 im Inneren des Filtereinsatzes 5 auf. An den Abfluß 3 aus dem Reinraum 9 schließt sich eine Rückführleitung 6 mit einem Absperrorgan 4 an. In Fig. 1 ist das Absperrorgan 4 geöffnet. Es wird allein der Schmutzraum 8 vom Zufluß 2 zum Abfluß 3 durchströmt, während der Brennstoff im Inneren des Filtereinsetzes 5 noch fest oder zähflüssig ist. Nach Erwärmung dieses Brennstoffs durch vorbeifließenden vorgewärmten Brennstoff wird das Absperrorgan 4 geschlossen und der Brennstoff fließt durch die Oberfläche des Filtereinsatzes 5 über den Abfluß 7 in Richtung zum Brennstoffeinspritzsystem.1 and 2 each show a fuel filter 1 with a housing provided with a lid and a filter insert 5 in section. The housing has an axial inflow 2 to the dirt chamber 8 and a radial outlet 3 from the dirt chamber 8 and a coaxial outlet 7 from the clean room 9 in the interior of the filter insert 5. A return line 6 with a shut-off device 4 connects to the drain 3 from the clean room 9. In Fig. 1, the shut-off device 4 is open. Only the dirt chamber 8 is flowed through from the inflow 2 to the outflow 3, while the fuel inside the filter insert 5 is still solid or viscous. After this fuel has been heated by the preheated fuel flowing past, the shut-off device 4 is closed and the fuel flows through the surface of the filter insert 5 via the drain 7 in the direction of the fuel injection system.

Fig. 3 zeigt einen Brennstoffbehälter 18 mit einer Heizeinrichtung 19, an den über eine Ansaugleitung 10 die Saugseite einer Brennstoff-förderpumpe 11 angeschlossen ist. Die Druckseite der Brennstofförderpumpe 11 ist über eine Förderleitung,in die ein Brennstoffilter 1 eingesetzt ist, mit einer Brennstoffeinspritzpumpe 14 verbunden. In der Förderleitung 12 ist eine Zusatzheizeinrichtung 13 angeordnet, die nicht notwendig vorhanden sein muß, aber bei langen Förderleitungen günstig für eine verbesserte Fließfähigkeit des Brennstoffs ist. Die Förderleitung 12 ist einerseits mit dem Zufluß 2 zum Schmutzraum 8 und andererseits mit dem Abfluß 7 aus dem Reinraum des Brennstoffilters verbunden. An den Abfluß 4 aus dem Schmutzraum 8 des Brennstoffilters 1 schließt eine Rückführleitung 6 zum Brennstoffbehälter 8 an, in die ein Absperrorgan 4 eingesetzt ist. Dieses muß ebenfalls nicht notwendig vorhanden sein, ist jedoch bei einer knappen Dimensionierung der Brennstofförderpumpe 11 zum Vermeiden eines Förderverlustes günstig. Von der Brennstoffeinspritzpumpe 14 gehen einzelne Einspritzleitungen 15 und eine Rücklaufleitung 16 aus. In der Rücklaufleitung 16, die in die Rückführleitung 6 aus dem Brennstoffilter 1 mündet, ist ein Druckhalteventil 17 eingesetzt. Die beiden letztgenannten Leitungen 6, 16 konnen auch getrennt zum Brennstoffbehälter 18 geführt sein. Der Brennstoffbehälter 18 mit Heizeinrichtung 19, die Brennstofförderpumpe 11 und die Zusatzheizeinrichtung 11 werden allgemein anlagenseitig von der Brennkraftmaschine entfernt angeordnet, während die übrigen gezeigten Baugruppen unmittelbar an dieser angeordnet sind.3 shows a fuel tank 18 with a heating device 19, to which the suction side of a fuel feed pump 11 is connected via an intake line 10. The pressure side of the fuel delivery pump 11 is connected to a fuel injection pump 14 via a delivery line, in which a fuel filter 1 is inserted. An additional heating device 13 is arranged in the delivery line 12, which does not necessarily have to be present, but is advantageous in the case of long delivery lines for improved flowability of the fuel. The delivery line 12 is connected on the one hand to the inflow 2 to the dirt chamber 8 and on the other hand to the outlet 7 from the clean room of the fuel filter. A return line 6 to the fuel tank 8 connects to the drain 4 from the dirt chamber 8 of the fuel filter 1, into which a shut-off element 4 is inserted. This also does not necessarily have to be present, but it is necessary to avoid a risk if the fuel delivery pump 11 is dimensioned tightly Funding loss cheap. Individual injection lines 15 and a return line 16 extend from the fuel injection pump 14. In the return line 16, which opens into the return line 6 from the fuel filter 1, a pressure control valve 17 is used. The latter two lines 6, 16 can also be routed separately to the fuel tank 18. The fuel tank 18 with the heating device 19, the fuel delivery pump 11 and the additional heating device 11 are generally arranged on the system side away from the internal combustion engine, while the other modules shown are arranged directly on the latter.

Claims (9)

1. Brennstoffvorwärmverfahren für Brennkraftmaschinen für Schwerölbetrieb, mit einer Brennstofförderpumpe, die aus einem Brennstoffvorratssystem vorgewärmten Brennstoff ansaugt, mit einem dieser nachgeschalteten Brennstoffilter und mit einem Brennstoffeinspritzsystem, das mit gefiltertem Brennstoff versorgt wird,
dadurch gekennzeichnet, daß in einer Anwärmphase vor dem Start die Brennstofförderpumpe (11) Brennstoff aus dem Brennstoffvorratssystem durch den Schmutzraum (8) des Brennstoffilters (1) pumpt, wobei der Brennstoff im Reinraum (9) des Brennstoffilters (1) durch den vorbeiströmenden Brennstoff bis zur Fließfähigkeit erwärmt wird.1. fuel preheating process for internal combustion engines for heavy oil operation, with a fuel feed pump which draws in preheated fuel from a fuel supply system, with a fuel filter connected downstream thereof and with a fuel injection system which is supplied with filtered fuel,
characterized in that in a warming-up phase before the start, the fuel feed pump (11) pumps fuel from the fuel supply system through the dirty space (8) of the fuel filter (1), the fuel in the clean room (9) of the fuel filter (1) through the fuel flowing through is heated to flowability. 2. Brennstoffvorwärmverfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Anwärmphase durch Unterbrechen einer Rückführung vom Schmutzraum (8) des Brennstoffilters (1) zum Brennstoffvorratssystem beendet wird.2. Fuel preheating method according to claim 1, characterized in that the heating phase is ended by interrupting a return from the dirty space (8) of the fuel filter (1) to the fuel supply system. 3. Brennstoffvorwärmverfahren nach Anspruch 2, dadurch gekennzeichnet, daß das Unterbrechen der Rückführung aus dem Schmutzraum (8) des Brennstofffilters (1) druckabhängig erfolgt.3. Fuel preheating method according to claim 2, characterized in that the interruption of the return from the dirty space (8) of the fuel filter (1) is pressure-dependent. 4. Brennstoffvorwärmverfahren nach Anspruch 2, dadurch gekennzeichnet, daß das Unterbrechen der Rückführung aus dem Schmutzraum (8) des Brennstofffilters (1) temperaturabhängig erfolgt.4. Fuel preheating method according to claim 2, characterized in that the interruption of the return from the dirty space (8) of the fuel filter (1) takes place as a function of temperature. 5. Brennstoffsystem zur Durchführung eines Brennstoffvorwärmverfahrens nach einem der Ansprüche 1 bis 4 für Brennkraftmaschinen für Schwerölbetrieb, mit einer Brennstoffpumpe, die aus dem Brennstoffvorratssystem vorgewärmten Brennstoff ansaugt, mit einem der Brennstofförderpumpe nachgeschalteten Brennstoffilter und mit einem Brennstoffeinspritz- system, das mit gefiltertem Brennstoff versorgt wird,
dadurch gekennzeichnet, daß der Brennstoffilter (1) einen Schmutzraum (8) mit einem Zufluß (2) und einem Abfluß (3) und einen Reinraum (9) mit einem weiteren Abfluß (7) aufweist, wobei der Zufluß (2) mit der Druckseite der Brennstofförderpumpe (11), der Abfluß (3) aus dem Schmutzraum (8) über eine Rückführleitung (6) mit dem Brennstoffvorratssystem und der Abfluß (7) aus dem Reinraum (9) mit dem Brennstoffeinspritzsystem verbunden ist.5. Fuel system for carrying out a Brennstoffvorwärmverfahrens according to one of claims 1 to 4 for internal combustion engines for heavy-oil operation with a fuel pump, the preheated from the fuel supply system fuel sucking, with one of the Brennstofförderpumpe downstream fuel filter and a fuel p scoring system with filtered fuel is cared for
characterized in that the fuel filter (1) has a dirt space (8) with an inflow (2) and an outflow (3) and a clean room (9) with a further outflow (7), the inflow (2) having the pressure side the fuel feed pump (11), the drain (3) from the dirty space (8) via a return line (6) to the fuel supply system and the drain (7) from the clean room (9) to the fuel injection system. 6. Brennstoffsystem nach Anspruch 5,
dadurch gekennzeichnet, daß der Abfluß (3) aus dem Schmutzraum (8) gegenüber dem Abfluß (7) aus dem Reinraum (9) einen gedrosselten Querschnitt hat.6. Fuel system according to claim 5,
characterized in that the outflow (3) from the dirty space (8) has a restricted cross section compared to the outflow (7) from the clean room (9). 7. Brennstoffsystem nach Anspruch 5, dadurch gekennzeichnet, daß ein Absperrorgan (4) im Abfluß (3) aus dem Schmutzraum (8) des Brennstoffilters (1) oder in der Rückführleitung (6) zum Brennstoffvorratssystem angeordnet ist.7. Fuel system according to claim 5, characterized in that a shut-off device (4) in the drain (3) from the dirty space (8) of the fuel filter (1) or in the return line (6) to the fuel supply system is arranged. 8. Brennstoffsystem nach Anspruch 7, dadurch gekennzeichnet, daß das Absperrorgan (4) als Druckhalteventil ausgebildet ist.8. Fuel system according to claim 7, characterized in that the shut-off element (4) is designed as a pressure-maintaining valve. 9. Brennstoffsystem nach Anspruch 7, dadurch gekennzeichnet, daß das Absperrorgan (4) als Thermostatventil ausgebildet ist.9. Fuel system according to claim 7, characterized in that the shut-off element (4) is designed as a thermostatic valve.
EP82106067A 1981-07-29 1982-07-07 Method of preheating fuel for an internal-combustion engine working with heavy fuel, and fuel system therefor Expired EP0071053B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82106067T ATE34808T1 (en) 1981-07-29 1982-07-07 FUEL PREHEATING METHOD FOR HEAVY FUEL FUEL ENGINES AND FUEL SYSTEM THEREOF.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3129861 1981-07-29
DE19813129861 DE3129861A1 (en) 1981-07-29 1981-07-29 FUEL PREHEATING METHOD FOR INTERNAL COMBUSTION ENGINES FOR HEAVY OIL OPERATION AND FUEL SYSTEM HERE

Publications (3)

Publication Number Publication Date
EP0071053A2 true EP0071053A2 (en) 1983-02-09
EP0071053A3 EP0071053A3 (en) 1984-02-22
EP0071053B1 EP0071053B1 (en) 1988-06-01

Family

ID=6137970

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82106067A Expired EP0071053B1 (en) 1981-07-29 1982-07-07 Method of preheating fuel for an internal-combustion engine working with heavy fuel, and fuel system therefor

Country Status (3)

Country Link
EP (1) EP0071053B1 (en)
AT (1) ATE34808T1 (en)
DE (2) DE3129861A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3307900A1 (en) * 1983-03-05 1984-10-11 Voiculescu, Romeo-Titel, Dipl.-Ing., 2000 Oststeinbek Unit for the preheating of heavy oil
EP0148374A2 (en) * 1983-12-20 1985-07-17 AlliedSignal Inc. Fuel supply system for a vehicle engine
EP0656471A2 (en) * 1993-10-28 1995-06-07 Siemens Aktiengesellschaft Device for lowering the fuel temperature in the tank of a motor vehicle
CN103470488A (en) * 2013-09-13 2013-12-25 河南省中原大化集团有限责任公司 Pump warming up capacity judging method
CN103883449A (en) * 2012-12-21 2014-06-25 福特环球技术公司 Fuel Filter

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GB841261A (en) * 1956-07-24 1960-07-13 Calipornia Res Corp Improvements in or relating to compression ignition engine fuel systems
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GB2031994A (en) * 1978-09-26 1980-04-30 Bosch Gmbh Robert Apparatus for filtering fuel for diesel engines
GB2051228A (en) * 1979-06-01 1981-01-14 Lucas Industries Ltd Fuel heating in a pumping and filtering supply system for diesel engines
US4300517A (en) * 1980-05-06 1981-11-17 Astansky Jury L Fuel supply device for a diesel engine

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FR2456223A1 (en) * 1979-05-08 1980-12-05 Elf France Operation of diesel engine at low temp. - using thermostatic element to control recycling of surplus fuel from injection pump for reheating
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GB841261A (en) * 1956-07-24 1960-07-13 Calipornia Res Corp Improvements in or relating to compression ignition engine fuel systems
DE2800486A1 (en) * 1977-01-28 1978-08-03 Caterpillar Tractor Co FLUID FILTER DEVICE
GB2028921A (en) * 1978-08-25 1980-03-12 Daimler Benz Ag Fuel-supply Arrangement
GB2031994A (en) * 1978-09-26 1980-04-30 Bosch Gmbh Robert Apparatus for filtering fuel for diesel engines
GB2051228A (en) * 1979-06-01 1981-01-14 Lucas Industries Ltd Fuel heating in a pumping and filtering supply system for diesel engines
US4300517A (en) * 1980-05-06 1981-11-17 Astansky Jury L Fuel supply device for a diesel engine

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3307900A1 (en) * 1983-03-05 1984-10-11 Voiculescu, Romeo-Titel, Dipl.-Ing., 2000 Oststeinbek Unit for the preheating of heavy oil
EP0148374A2 (en) * 1983-12-20 1985-07-17 AlliedSignal Inc. Fuel supply system for a vehicle engine
EP0148374B1 (en) * 1983-12-20 1990-02-07 AlliedSignal Inc. Fuel supply system for a vehicle engine
EP0656471A2 (en) * 1993-10-28 1995-06-07 Siemens Aktiengesellschaft Device for lowering the fuel temperature in the tank of a motor vehicle
EP0656471A3 (en) * 1993-10-28 1995-07-05 Siemens Ag
CN103883449A (en) * 2012-12-21 2014-06-25 福特环球技术公司 Fuel Filter
CN103470488A (en) * 2013-09-13 2013-12-25 河南省中原大化集团有限责任公司 Pump warming up capacity judging method
CN103470488B (en) * 2013-09-13 2015-11-18 河南省中原大化集团有限责任公司 The determination methods of warming-up amount

Also Published As

Publication number Publication date
EP0071053B1 (en) 1988-06-01
EP0071053A3 (en) 1984-02-22
DE3129861A1 (en) 1983-02-17
ATE34808T1 (en) 1988-06-15
DE3278576D1 (en) 1988-07-07

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