WO2006079402A1 - Fuel supply device - Google Patents

Fuel supply device Download PDF

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Publication number
WO2006079402A1
WO2006079402A1 PCT/EP2005/013727 EP2005013727W WO2006079402A1 WO 2006079402 A1 WO2006079402 A1 WO 2006079402A1 EP 2005013727 W EP2005013727 W EP 2005013727W WO 2006079402 A1 WO2006079402 A1 WO 2006079402A1
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WO
WIPO (PCT)
Prior art keywords
fuel
pressure
supply device
fuel supply
line
Prior art date
Application number
PCT/EP2005/013727
Other languages
German (de)
French (fr)
Inventor
Marc VÖLKER
Original Assignee
Daimlerchrysler Ag
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Daimlerchrysler Ag filed Critical Daimlerchrysler Ag
Publication of WO2006079402A1 publication Critical patent/WO2006079402A1/en

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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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
    • F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
    • 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
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
    • F02M69/54—Arrangement of fuel pressure regulators
    • 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
    • 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
    • F02M37/0076—Details of the fuel feeding system related to the fuel tank
    • F02M37/0088—Multiple separate fuel tanks or tanks being at least partially partitioned
    • F02M37/0094—Saddle tanks; Tanks having partition walls
    • 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
    • F02M37/02—Feeding by means of suction apparatus, e.g. by air flow through carburettors
    • F02M37/025—Feeding by means of a liquid fuel-driven jet pump
    • 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
    • F02M37/04—Feeding by means of driven pumps
    • F02M37/08—Feeding by means of driven pumps electrically driven
    • F02M37/10—Feeding by means of driven pumps electrically driven submerged in fuel, e.g. in reservoir
    • F02M37/106—Feeding by means of driven pumps electrically driven submerged in fuel, e.g. in reservoir the pump being installed in a sub-tank

Definitions

  • the invention relates to a fuel supply device according to the preamble of claim 1.
  • a fuel supply device in which an electronically controlled fuel pump promotes fuel from a fuel reservoir to an internal combustion engine.
  • a pressure limiting device is connected downstream of a pressure sensor and controlled such that the fuel pressure is approximately equal to a desired pressure.
  • the pressure limiting device opens and delivers fuel into a return line.
  • a suction jet pump is connected in the return line.
  • the invention has for its object to provide a fuel supply device with which any Abstelltik can be realized.
  • the object is achieved by the features of claim 1.
  • a second pressure limiting device for supplying fuel to an internal combustion engine, in addition to an at least first pressure limiting device, a second pressure limiting device is provided, whose reference port influencing its opening pressure is acted upon by pressure of a supply line, which is arranged upstream of a check valve.
  • This has the advantage that the opening pressure of the second pressure limiting device and thus also the shutdown pressure of the fuel supply device can be chosen arbitrarily.
  • the second pressure limiting unit is deactivated while the fuel pump is running.
  • the second pressure-limiting unit can open at significantly lower pressures than the first pressure-limiting unit.
  • the check valve in the supply line is expediently arranged upstream of the fuel filter.
  • the second pressure limiting device is arranged with its reference port upstream of the arranged in the flow line check valve and the fuel filter. It is equally expedient to arrange the second pressure limiting device downstream of the fuel filter.
  • the flow line is drivingly connected to a first suction jet pump.
  • the first pressure limiting device downstream in a branch line of a high pressure line of the fuel filter is arranged.
  • the first pressure limiting device opens at a pressure which corresponds at least to the maximum system pressure.
  • the single figure shows schematically a preferred KraftStoffVersorgungs thanks according to the invention.
  • a pump control unit 19 is connected to the fuel pump 15 via electrical lines 18 for electronic control.
  • the fuel reservoir 11 has a first chamber 12 and a second chamber 13 and is configured overall as a saddle tank.
  • a swirl pot 14 is provided, in which the fuel pump 15 is arranged.
  • Fuel from the first chamber 12 is directed via a first suction jet pump 16 into the surge pot 14, which is driven by a Kraftstoffström from a flow line 26.
  • a check valve 20 protects the upstream components of the fuel supply 10 from fuel flowing back out of the fuel filter 21.
  • a branch line 28 leads from the feed line 26 to a second suction jet pump 17, which sits in the second chamber 13 of the fuel tank 11 and conveys the fuel via a connecting line 29 from the second chamber 13 into the first chamber 12.
  • the second suction jet pump 17 is thus as well as the first suction jet pump 16 driven by fuel from the flow line 26.
  • a first pressure-limiting device 22 is arranged in a branch line 31 branching off from a high-pressure line 30.
  • the high pressure line 30 leads downstream of the fuel filter 21 to the storage space 23.
  • This pressure limiting device 22 opens only at a high pressure which corresponds at least to the maximum system pressure, or preferably greater than the maximum system pressure.
  • a second pressure-limiting device 24 is provided in a branch line 32 branching off from the high-pressure line 30, whose reference port 25 is acted upon by pressure of the branch line 28, which is arranged upstream of the check valve 20 and from which the feed line 26 branches off.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

The invention relates to a fuel supply device for supplying an internal combustion engine with fuel. Said fuel supply device comprises at least one electrically driven fuel pump (15) that delivers the fuel from a fuel reservoir (11) via a fuel filter (21) to the internal combustion engine, and at least one pressure limiting device (22). The stop pressure of the fuel supply device can be freely adjusted if a second pressure limiting device (24) is provided whose reference connection (25) influencing the opening pressure is impinged upon by pressure from a flow line (26), mounted upstream of a non-return valve (20).

Description

DaimlerChrysler AGDaimlerChrysler AG
KraftStoffVersorgungseinrichtungFuel supply
Die Erfindung betrifft eine Kraftstoffversorgungseinrichtung nach dem Oberbegriff des Anspruchs 1.The invention relates to a fuel supply device according to the preamble of claim 1.
Aus der Offenlegungsschrift DE 100 06 622 Al ist ein KraftstoffVersorgungseinrichtung bekannt , bei dem eine elektronisch geregelte Kraftstoffpumpe Kraftstoff aus einem Kraftstoff-Vorratsbehälter zu einer Brennkraftmaschine fördert . Eine Druckbegrenzungseinrichtung ist stromab eines Drucksensors angeschlossen und derart gesteuert , dass der Kraftstoff- druck annähernd gleich einem Solldruck ist . Bei Überschreiten eines etwas unterhalb des Solldrucks liegenden Kraftstoffdrucks öffnet die Druckbegrenzungseinrichtung und gibt Kraftstoff in eine Rücklaufleitung ab . Eine Saugstrahlpumpe ist in der Rücklaufleitung angeschlossen .From the patent application DE 100 06 622 Al a fuel supply device is known in which an electronically controlled fuel pump promotes fuel from a fuel reservoir to an internal combustion engine. A pressure limiting device is connected downstream of a pressure sensor and controlled such that the fuel pressure is approximately equal to a desired pressure. When a fuel pressure slightly below the target pressure is exceeded, the pressure limiting device opens and delivers fuel into a return line. A suction jet pump is connected in the return line.
In elektronisch geregelten KraftstoffSystemen mit vorlaufbetriebenen Saugstrahlpumpen, variablem Systemdruck und hohen maximalen Drücken ist es notwendig, das Druckbegrenzungsventil so auszulegen, dass es erst oberhalb des maximalen Systemdrucks öffnet . Problematisch ist , dass dessen Abstelldruck denselben hohen Wert erreichen kann.In electronically controlled fuel systems with advance-driven suction jet pumps, variable system pressure and high maximum pressures, it is necessary to design the pressure relief valve so that it only opens above the maximum system pressure. The problem is that its Abstelldruck can reach the same high value.
Der Erfindung liegt die Aufgabe zugrunde, eine KraftstoffVersorgungseinrichtung anzugeben, mit der ein beliebiger Abstelldruck realisiert werden kann. Die Aufgabe wird erfindungsgemäß durch die Merkmale des Anspruchs 1 gelöst .The invention has for its object to provide a fuel supply device with which any Abstelldruck can be realized. The object is achieved by the features of claim 1.
Bei einer erfindungsgemäßen Kraftstoffversorgungseinrichtung zur KraftstoffVersorgung einer Brennkraftmaschine , ist neben einer wenigstens ersten Druckbegrenzungseinrichtung eine zweite Druckbegrenzungseinrichtung vorgesehen, deren ihren Öffnungsdruck beeinflussender Referenzanschluss mit Druck einer Vorlaufleitung beaufschlagt ist , welche stromauf vor einem Rückschlagventil angeordnet ist . Dies hat den Vorteil , dass der Öffnungsdruck der zweiten Druckbegrenzungseinrichtung und damit auch der Abstelldruck der Kraftstoffversorgungseinrichtung beliebig gewählt werden kann . Durch diese Verschaltung wird die zweite Druckbegrenzungseinheit bei laufender Kraftstoffpumpe deaktiviert . Bei abgestellter KraftstoffVersorgungseinrichtung kann die zweite Druckbegrenzungs- einheit bei deutlich geringeren Drücken öffnen als die erste Druckbegrenzungseinheit .In a fuel supply device according to the invention for supplying fuel to an internal combustion engine, in addition to an at least first pressure limiting device, a second pressure limiting device is provided, whose reference port influencing its opening pressure is acted upon by pressure of a supply line, which is arranged upstream of a check valve. This has the advantage that the opening pressure of the second pressure limiting device and thus also the shutdown pressure of the fuel supply device can be chosen arbitrarily. Through this interconnection, the second pressure limiting unit is deactivated while the fuel pump is running. When the fuel supply device is switched off, the second pressure-limiting unit can open at significantly lower pressures than the first pressure-limiting unit.
Günstige Ausgestaltungen und Vorteile der Erfindung sind der Beschreibung sowie den weiteren Ansprüchen zu entnehmen.Favorable embodiments and advantages of the invention are described in the description and the other claims.
Zweckmäßigerweise ist das Rückschlagventil in der Vorlauflei- tung stromauf vor dem Kraftstofffilter angeordnet . Damit ist die zweite Druckbegrenzungseinrichtung mit ihrem Referenzanschluss stromauf vor dem in der Vorlaufleitung angeordneten Rückschlagventil und dem Kraftstofffilter angeordnet . Ebenso zweckmäßig ist es , die zweite Druckbegrenzungseinrichtung stromab des Kraftstofffilters anzuordnen.The check valve in the supply line is expediently arranged upstream of the fuel filter. Thus, the second pressure limiting device is arranged with its reference port upstream of the arranged in the flow line check valve and the fuel filter. It is equally expedient to arrange the second pressure limiting device downstream of the fuel filter.
Bevorzugt ist die Vorlaufleitung antriebsmäßig mit einer ersten Saugstrahlpumpe verbunden.Preferably, the flow line is drivingly connected to a first suction jet pump.
Es ist vorteilhaft , wenn die erste Druckbegrenzungseinrichtung in einer Abzweigleitung einer Hochdruckleitung stromab des Kraftstofffilters angeordnet ist . Die erste Druckbegrenzungseinrichtung öffnet bei einem Druck, der mindestens dem maximalen Systemdruck entspricht .It is advantageous if the first pressure limiting device downstream in a branch line of a high pressure line of the fuel filter is arranged. The first pressure limiting device opens at a pressure which corresponds at least to the maximum system pressure.
Im Folgenden wird die Erfindung anhand eines in der Zeichnung beschriebenen Ausführungsbeispiels näher erläutert . Die Zeichnung, die Beschreibung und die Ansprüche enthalten zahlreiche Merkmale in Kombination, die der Fachmann zweckmäßigerweise auch einzeln betrachten und zu sinnvollen weiteren Kombinationen zusammenfassen wird.In the following the invention will be explained in more detail with reference to an embodiment described in the drawing. The drawing, the description and the claims contain numerous features in combination, which the person skilled in the art expediently also individually consider and summarize meaningful further combinations.
Dabei zeigt die einzige Figur schematisch eine bevorzugte KraftStoffVersorgungseinrichtung nach der Erfindung .The single figure shows schematically a preferred KraftStoffVersorgungseinrichtung according to the invention.
Wie aus der Figur in schematischer Darstellung ersichtlich, umfasst eine bevorzugte Kraftstoffversorgungseinrichtung 10 zur KraftstoffVersorgung einer nicht abgebildeten Brennkraftmaschine wenigstens eine elektrisch angetriebene Kraftstoffpumpe 15 , die Kraftstoff aus einem Kraftstoff-Vorratsbehälter 11 über einen Kraftstofffilter 21 zu einem als Hochdruck-Rail ausgebildeten Speicherraum 23 einer Brennkraftmaschine befördert , in die der Kraftstoff über nicht dargestellte Ein- spritzventile eingespritzt wird. Ein Pumpensteuergerät 19 ist zur elektronischen Regelung mit der Kraftstoffpumpe 15 über elektrische Leitungen 18 verbunden.As can be seen schematically from the figure, a preferred fuel supply device 10 for supplying fuel to an internal combustion engine, not shown, at least one electrically driven fuel pump 15, the fuel from a fuel reservoir 11 via a fuel filter 21 to a designed as a high-pressure rail storage chamber 23 of an internal combustion engine into which the fuel is injected via injection valves, not shown. A pump control unit 19 is connected to the fuel pump 15 via electrical lines 18 for electronic control.
Der Kraftstoff-Vorratsbehälter 11 weist eine erste Kammer 12 und eine zweite Kammer 13 auf und ist insgesamt als Sattel- tank ausgebildet . In der ersten Kammer 12 ist ein Schwalltopf 14 vorgesehen, in dem die Kraftstoffpumpe 15 angeordnet ist . Kraftstoff aus der ersten Kammer 12 wird über eine erste Saugstrahlpumpe 16 in den Schwalltopf 14 geleitet , die über einen Kraftstoffström aus einer Vorlaufleitung 26 angetrieben ist . Dazu ist eine Abzweigleitung 27 von der Vorlaufleitung 26 , die von der Kraftstoffpumpe 15 zu einem Kraftstofffilter 21 führt , zur Saugstrahlpumpe 16 vorgesehen .The fuel reservoir 11 has a first chamber 12 and a second chamber 13 and is configured overall as a saddle tank. In the first chamber 12, a swirl pot 14 is provided, in which the fuel pump 15 is arranged. Fuel from the first chamber 12 is directed via a first suction jet pump 16 into the surge pot 14, which is driven by a Kraftstoffström from a flow line 26. For this purpose, a branch line 27 of the flow line 26, which leads from the fuel pump 15 to a fuel filter 21, provided to the suction jet pump 16.
Stromauf des Kraftstofffilters 21 schützt ein Rückschlagventil 20 die stromauf liegenden Komponenten der KraftStoffVersorgungseinrichtung 10 vor aus dem Kraftstofffilter 21 zurückströmendem Kraftstoff . Stromauf des Rückschlagventils 20 führt eine Abzweigleitung 28 von der VorlaufIeitung 26 zu einer zweiten Saugstrahlpumpe 17 , die in der zweiten Kammer 13 des Kraftstoff-Vorratsbehälters 11 sitzt und die Kraftstoff über eine Verbindungsleitung 29 aus der zweiten Kammer 13 in die erste Kammer 12 fördert . Die zweite Saugstrahlpumpe 17 wird somit ebenso wie die erste Saugstrahlpumpe 16 von Kraftstoff aus der Vorlaufleitung 26 angetrieben.Upstream of the fuel filter 21, a check valve 20 protects the upstream components of the fuel supply 10 from fuel flowing back out of the fuel filter 21. Upstream of the check valve 20, a branch line 28 leads from the feed line 26 to a second suction jet pump 17, which sits in the second chamber 13 of the fuel tank 11 and conveys the fuel via a connecting line 29 from the second chamber 13 into the first chamber 12. The second suction jet pump 17 is thus as well as the first suction jet pump 16 driven by fuel from the flow line 26.
Eine erste Druckbegrenzungseinrichtung 22 ist in einer von einer Hochdruckleitung 30 abzweigenden Abzweigleitung 31 angeordnet . Die Hochdruckleitung 30 führt stromab vom Kraftstofffilter 21 zum Speicherraum 23. Diese Druckbegrenzungseinrichtung 22 öffnet erst bei einem hohen Druck, der mindestens dem maximalen Systemdruck entspricht , bzw. vorzugsweise größer als der maximale Systemdruck ist .A first pressure-limiting device 22 is arranged in a branch line 31 branching off from a high-pressure line 30. The high pressure line 30 leads downstream of the fuel filter 21 to the storage space 23. This pressure limiting device 22 opens only at a high pressure which corresponds at least to the maximum system pressure, or preferably greater than the maximum system pressure.
Erfindungsgemäß ist eine zweite Druckbegrenzungseinrichtung 24 in einer von der Hochdruckleitung 30 abzweigenden Abzweigleitung 32 vorgesehen, deren Referenzanschluss 25 mit Druck der Abzweigleitung 28 beaufschlagt ist , welche stromauf vor dem Rückschlagventil 20 angeordnet ist und von der die Vorlaufleitung 26 abzweigt . Durch diese Verschaltung des Referenzanschlusses mit der Vorlaufleitung 26 wird die zweite Druckbegrenzungseinrichtung 24 bei laufender Kraftstoffpumpe 15 deaktiviert, und es kann ein beliebiger Abstelldruck der KraftstoffVersorgungseinrichtung 10 realisiert werden. According to the invention, a second pressure-limiting device 24 is provided in a branch line 32 branching off from the high-pressure line 30, whose reference port 25 is acted upon by pressure of the branch line 28, which is arranged upstream of the check valve 20 and from which the feed line 26 branches off. As a result of this interconnection of the reference connection with the feed line 26, the second pressure limiting device 24 is deactivated while the fuel pump 15 is running, and any desired shutdown pressure of the fuel supply device 10 can be realized.

Claims

DaimlerChrysler AGPatentansprüche DaimlerChrysler AGPatent claims
1. Kraftstoffversorgungseinrichtung zur KraftstoffVersorgung einer Brennkraftmaschine, mit wenigstens einer elektrisch angetriebenen Kraftstoffpumpe (15) , die Kraftstoff aus einem Kraftstoff-Vorratsbehälter (11) über einen Kraft- Stofffilter (21) zur Brennkraftmaschine befördert , wobei wenigstens eine Druckbegrenzungseinrichtung (22) vorgesehen ist , dadurch gekennzeichnet , dass eine zweite Druckbegrenzungseinrichtung (24) vorgesehen ist , deren ihren Öffnungsdruck beeinflussender Re- ferenzanschluss (25) mit Druck einer Vorlauf1eitung (26) beaufschlagt ist , welche stromauf vor einem Rückschlagventil (20) angeordnet ist .A fuel supply device for supplying fuel to an internal combustion engine, comprising at least one electrically driven fuel pump (15) which conveys fuel from a fuel reservoir (11) to the internal combustion engine via a fuel filter (21), at least one pressure limiting device (22) being provided. characterized in that a second pressure-limiting device (24) is provided, whose reference opening (25) influencing its opening pressure is acted upon by pressure of a supply line (26) which is arranged upstream of a check valve (20).
2. Kraftstoffversorgungseinrichtung nach Anspruch 1 , dadurch gekennzeichnet , dass das Rückschlagventil (20) in der Vorlauf1eitung (25) stromauf vor dem Kraftstofffilter (21) angeordnet ist .2. Fuel supply device according to claim 1, characterized in that the check valve (20) in the feed line (25) upstream of the fuel filter (21) is arranged.
3. Kraftstoffversorgungseinrichtung nach Anspruch 1 oder 2 , dadurch gekennzeichnet, dass die zweite Druckbegrenzungseinrichtung (24 ) stromab des Kraftstofffilters (21) angeordnet ist . 3. Fuel supply device according to claim 1 or 2, characterized in that the second pressure limiting device (24) downstream of the fuel filter (21) is arranged.
4. Kraftstoffversorgungseinrichtung nach einem der vorhergehenden Ansprüche , dadurch gekennzeichnet , dass die Vorlaufleitung (26) antriebsmäßig mit einer ersten Saugstrahlpumpe (16) verbunden ist .4. Fuel supply device according to one of the preceding claims, characterized in that the flow line (26) is drivingly connected to a first suction jet pump (16).
5. Kraftstoffversorgungseinrichtung nach einem der vorhergehenden Ansprüche , dadurch gekennzeichnet, dass die erste Druckbegrenzungseinrichtung (22 ) in einer Abzweigleitung (31) einer Hochdruckleitung (30) stromab des Kraftstofffilters (21) angeordnet ist . 5. Fuel supply device according to one of the preceding claims, characterized in that the first pressure limiting device (22) in a branch line (31) of a high pressure line (30) downstream of the fuel filter (21) is arranged.
PCT/EP2005/013727 2005-01-26 2005-12-20 Fuel supply device WO2006079402A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005003592.2 2005-01-26
DE200510003592 DE102005003592A1 (en) 2005-01-26 2005-01-26 Fuel supply device e.g. for supplying internal combustion engine with fuel, has electrically driven fuel pump which delivers fuel from fuel reservoir via fuel filter to internal combustion engine

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WO2006079402A1 true WO2006079402A1 (en) 2006-08-03

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WO2014139813A1 (en) * 2013-03-12 2014-09-18 Robert Bosch Gmbh Fuel filter that is depressurized in the shut-off state, having ventilation by means of a suction jet pump or by means of a venting valve
WO2014206632A1 (en) * 2013-06-26 2014-12-31 Robert Bosch Gmbh Fuel delivery system with partial pressure relief valve on the drive line of a suction jet pump

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DE10212870A1 (en) * 2002-03-22 2003-10-02 Volkswagen Ag Fuel supply system of IC engine with high pressure injection has valve fitted in HP pump leakage pipe
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DE19614884A1 (en) * 1996-04-16 1997-10-23 Bosch Gmbh Robert Control method and device for fuel-injected IC engine
DE19818421A1 (en) * 1998-04-24 1999-10-28 Bosch Gmbh Robert Fuel injection system for IC engines
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Publication number Priority date Publication date Assignee Title
WO2014139813A1 (en) * 2013-03-12 2014-09-18 Robert Bosch Gmbh Fuel filter that is depressurized in the shut-off state, having ventilation by means of a suction jet pump or by means of a venting valve
WO2014206632A1 (en) * 2013-06-26 2014-12-31 Robert Bosch Gmbh Fuel delivery system with partial pressure relief valve on the drive line of a suction jet pump

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