EP1048841A1 - Système d'alimentation en carburant d'un moteur à combustion interne - Google Patents

Système d'alimentation en carburant d'un moteur à combustion interne Download PDF

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Publication number
EP1048841A1
EP1048841A1 EP00107444A EP00107444A EP1048841A1 EP 1048841 A1 EP1048841 A1 EP 1048841A1 EP 00107444 A EP00107444 A EP 00107444A EP 00107444 A EP00107444 A EP 00107444A EP 1048841 A1 EP1048841 A1 EP 1048841A1
Authority
EP
European Patent Office
Prior art keywords
fuel
internal combustion
combustion engine
pump
bar
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP00107444A
Other languages
German (de)
English (en)
Other versions
EP1048841B1 (fr
Inventor
Bernd Henningsen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Deutz AG
Original Assignee
Deutz AG
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Filing date
Publication date
Application filed by Deutz AG filed Critical Deutz AG
Publication of EP1048841A1 publication Critical patent/EP1048841A1/fr
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Publication of EP1048841B1 publication Critical patent/EP1048841B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • F02M37/0052—Details on the fuel return circuit; Arrangement of pressure regulators
    • F02M37/0058—Returnless fuel systems, i.e. the fuel return lines are not entering the fuel tank
    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/007—Venting means

Definitions

  • the invention relates to an internal combustion engine with a fuel system, consisting of a fuel tank, a filter of a feed pump, an injection pump and interconnecting these components Fuel lines, the filter, the feed pump and the injection pump are connected to a machine cycle.
  • Such an internal combustion engine is known from DE-A 28 41 768.
  • the fuel from a fuel tank through a filter and one Feed pump in an injection pump and at the excess Fuel is returned to the fuel tank via a return line is additionally provided that behind the injection pump (warmed) excess fuel with cold fuel in the fuel tank via a short circuit line to avoid Paraffin excretion in the area of the injection pump from the return line initiated thermostatically controlled in the feed line becomes.
  • the short-circuit line is completely closed and all of the fuel flows back into the fuel tank.
  • the invention has for its object a fuel supply system to provide an internal combustion engine, which in terms of Dimensioning of the switched between the fuel tank and the injection pump Components is optimized.
  • This object is achieved in that the fuel tank only via a fuel supply line to the machine circuit is connected.
  • This training has the advantage that in the area the internal combustion engine a closed machine cycle exists in which only the used during the operation of the internal combustion engine Fuel is supplied from the fuel tank.
  • This interpretation has several advantages. First of all, it can be assumed that the amount of fuel passed through the injection pump is always larger than that of the combustion chamber or the combustion chambers amount of fuel actually delivered. For example, this will by the controlled at the end of the injection process Amount of fuel caused. This "unnecessary" amount of fuel according to the invention is no longer returned to the fuel tank, but remains close to the internal combustion engine in all operating states Machine cycle.
  • a is in the fuel supply line Hand pump used, which also corresponds to the small line cross section is dimensioned appropriately.
  • an output side is in the machine circuit a pressure control valve is switched on to the injection pump.
  • This pressure relief valve is preferably in development before one provided fuel cooler switched into the pipe system. This allows the pressure in the area of the injection pump to rise to be kept at a relatively high level while in the area behind the injection pump in front of the fuel cooler and in front of the feed pump is kept at a low pressure level. Thereby can also adapt the design of the fuel cooler accordingly become.
  • there is the advantage that the to be filled by the pre-feed pump into the machine circuit Pumped fuel with a relatively low pressure level can be.
  • the injection pump is at least one Single injection pump element.
  • the invention can be used particularly advantageously.
  • These single injection pump elements are preferred directly in the crankcase the internal combustion engine used. This results in the Possibility of the fuel supply line for these single injection pump elements also directly into the crankcase or start directly outside. To then along the row of cylinders Temperature level of the individual injection pump elements that is as uniform as possible To ensure the fuel supplied is a higher flow rate than for the pure operation of the single injection pump elements is necessary.
  • the feed pump has one around Factor 5 to 15, especially factor 10, higher delivery rate than the pre-feed pump. This ensures that the Flow rate of fuel is so great that there are no negative effects Fuel heating along the cylinder bank of the internal combustion engine occurs.
  • the pressure of the feed pump is 3 to 7 bar, especially 5 bar, set while the pressure maintaining valve this pressure is reduced to 0.1 to 0.5 bar, in particular 0.2 bar. Accordingly, the delivery pressure of the pre-delivery pump is 0.1 to 0.5 bar, in particular 0.1 bar. With this so tuned System, safe operation of the internal combustion engine is possible.
  • FIG. 1 shows an internal combustion engine 1 with a crankcase 2, in which in the four-cylinder version shown four single injection pump elements 3 are used. These single injection pump elements 3 deliver fuel via a short injection line 4 into Injector 5, which the fuel in the working space of the internal combustion engine injected under high pressure (in the figure are the previous designated components for better understanding from their real Installation position shown removed).
  • the actual fuel system has a fuel tank 6, in which projects into a fuel supply line 7.
  • the fuel supply line 7 is a shut-off valve 8 (only one High tank mounted), a prefilter 9 and a prefeed pump 10 are used.
  • This feed pump 10 delivers the fuel from the Fuel tank 6 in a fuel line 17a of an engine circuit 17 with a delivery pressure of in particular 0.1 bar.
  • the fuel line 17a leads to a feed pump 11, which in the illustrated Embodiment of a belt drive 12 of the internal combustion engine is driven.
  • This feed pump 11 preferably has one delivery rate 10 times higher than the pre-feed pump 10 and delivers, for example, 10 liters of fuel per minute, while the pre-feed pump delivers 1 liter of fuel per minute.
  • a particular advantage of this system is that the pre-feed pump and in particular the pre-filter 9 only for the small one to be refilled Amount of fuel must be designed. This is especially under the point of view that the pre-filter put all sorts into the fuel tank 6 must filter out dirt particles, advantageous, because this component is dimensioned significantly smaller can. In addition, contamination of the tank, for example avoided by oil from the single injection pump elements.
  • the embodiment of Figure 2 is only in the following details which differ from FIG. 1 are described.
  • the fuel system also has a fuel tank 6 into which one Fuel supply line 7 protrudes.
  • the hand pump 20 is only used to deliver fuel from the fuel tank 6 into the machine circuit 17 after a previous draining of the fuel from the fuel system, for example needed after maintenance.
  • the filter and the pre-filter in this embodiment combined into a filter 13a, the machine circuit 17 with the fuel lines 17a, 17d and the fuel supply line 7 open into the filter 13a.
  • the filter 13a can with a Viewing glass 13b and automatic or manual Have ventilation device 13c.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP00107444A 1999-04-27 2000-04-06 Système d'alimentation en carburant d'un moteur à combustion interne Expired - Lifetime EP1048841B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19918984A DE19918984A1 (de) 1999-04-27 1999-04-27 Kraftstoffversorgungssystem einer Brennkraftmaschine
DE19918984 1999-04-27

Publications (2)

Publication Number Publication Date
EP1048841A1 true EP1048841A1 (fr) 2000-11-02
EP1048841B1 EP1048841B1 (fr) 2004-12-01

Family

ID=7905939

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00107444A Expired - Lifetime EP1048841B1 (fr) 1999-04-27 2000-04-06 Système d'alimentation en carburant d'un moteur à combustion interne

Country Status (2)

Country Link
EP (1) EP1048841B1 (fr)
DE (2) DE19918984A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2841768A1 (de) 1978-09-26 1980-04-10 Bosch Gmbh Robert Einrichtung zum filtrieren von kraftstoff fuer dieselmotoren
DE3344767A1 (de) * 1983-12-10 1985-06-20 Vdo Schindling Kraftstoffversorgungseinrichtung
FR2564147A1 (fr) * 1984-05-09 1985-11-15 Mielle Jean Pierre Dispositif de defigeage, fluidification et epuration du gazole dans les moteurs diesel
US4669659A (en) * 1984-09-14 1987-06-02 Robert Bosch Gmbh Electrically controlled unit fuel injector for fuel injection in diesel engines
US4850327A (en) * 1987-04-08 1989-07-25 Elf France Device for improving the feed of diesel engines at low temperatures
JPH04295172A (ja) * 1991-03-26 1992-10-20 Suzuki Motor Corp 船外機用四サイクル燃料噴射エンジンにおける燃料供給装置
US5520154A (en) * 1992-03-04 1996-05-28 Ficht Gmbh Fuel injection device according to the solid-state energy storage principle for internal combustion engines
EP0780567A1 (fr) * 1995-12-18 1997-06-25 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Système d'alimentation en carburant

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL153975B (nl) * 1974-02-05 1977-07-15 Doornes Bedrijfswagen Fab Brandstofverbruikmeetinrichting voor een verbrandingsmotor.
US4789308A (en) * 1986-10-10 1988-12-06 Walbro Corporation Self-contained electric fuel pump with output pressure regulation
DE3805866A1 (de) * 1987-03-04 1988-09-15 Volkswagen Ag Kraftstoff-foerdersystem
US4951636A (en) * 1988-11-28 1990-08-28 Walbro Corporation Constant pressure-differential fuel injection system
DE4430472A1 (de) * 1994-08-27 1996-02-29 Bosch Gmbh Robert Druckregelventil
DE19619336A1 (de) * 1996-05-14 1997-11-20 Bosch Gmbh Robert Kraftstoffzumeßsystem für eine Brennkraftmaschine mit Fremdzündung
DE19631981B4 (de) * 1996-08-08 2006-02-09 Volkswagen Ag Vorrichtung zum Kühlen eines Kraftstoffes eines geschlossenen Kraftstoffversorgungskreislaufes eines Dieselaggregats

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2841768A1 (de) 1978-09-26 1980-04-10 Bosch Gmbh Robert Einrichtung zum filtrieren von kraftstoff fuer dieselmotoren
DE3344767A1 (de) * 1983-12-10 1985-06-20 Vdo Schindling Kraftstoffversorgungseinrichtung
FR2564147A1 (fr) * 1984-05-09 1985-11-15 Mielle Jean Pierre Dispositif de defigeage, fluidification et epuration du gazole dans les moteurs diesel
US4669659A (en) * 1984-09-14 1987-06-02 Robert Bosch Gmbh Electrically controlled unit fuel injector for fuel injection in diesel engines
US4850327A (en) * 1987-04-08 1989-07-25 Elf France Device for improving the feed of diesel engines at low temperatures
JPH04295172A (ja) * 1991-03-26 1992-10-20 Suzuki Motor Corp 船外機用四サイクル燃料噴射エンジンにおける燃料供給装置
US5520154A (en) * 1992-03-04 1996-05-28 Ficht Gmbh Fuel injection device according to the solid-state energy storage principle for internal combustion engines
EP0780567A1 (fr) * 1995-12-18 1997-06-25 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Système d'alimentation en carburant

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 017, no. 106 (M - 1375) 4 March 1993 (1993-03-04) *

Also Published As

Publication number Publication date
EP1048841B1 (fr) 2004-12-01
DE19918984A1 (de) 2000-11-02
DE50008796D1 (de) 2005-01-05

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