WO2000000733A1 - Dispositif pour assurer une alimentation en carburant au moyen d'une unite d'alimentation en carburant - Google Patents

Dispositif pour assurer une alimentation en carburant au moyen d'une unite d'alimentation en carburant Download PDF

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Publication number
WO2000000733A1
WO2000000733A1 PCT/DE1999/001847 DE9901847W WO0000733A1 WO 2000000733 A1 WO2000000733 A1 WO 2000000733A1 DE 9901847 W DE9901847 W DE 9901847W WO 0000733 A1 WO0000733 A1 WO 0000733A1
Authority
WO
WIPO (PCT)
Prior art keywords
fuel
delivery unit
venturi
fuel tank
jet pump
Prior art date
Application number
PCT/DE1999/001847
Other languages
German (de)
English (en)
Inventor
Kurt Frank
Original Assignee
Robert Bosch Gmbh
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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2000000733A1 publication Critical patent/WO2000000733A1/fr

Links

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
    • F02M37/02—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

Definitions

  • the invention relates to a device for fuel delivery by means of a fuel delivery unit according to the preamble of claim 1.
  • Such devices are known from published patent application DE 42 42 242 AI.
  • the fuel delivery unit is supplied with fuel by means of a suction jet pump which is arranged in a fuel return.
  • the suction jet pump causes the fuel level in the fuel delivery unit to be higher than in the fuel tank from which the suction jet pump pumps fuel with the aid of a drive jet which is driven by the fuel return.
  • the arrangement of the suction jet pump known from DE 42 42 242 AI has the disadvantage that the fuel tank cannot be optimally emptied by the suction jet pump, so that a considerable amount of fuel remains in the fuel tank, which cannot be supplied to the fuel delivery unit, so that the internal combustion engine comes to a standstill prematurely.
  • FIG. 1 shows a fuel delivery by means of a fuel delivery unit 1 in a fuel tank 2, which has a fuel pump for a fuel flow, a suction jet pump 4 arranged in a fuel return 3 with a Venturi tube section 5 with a Venturi nozzle 6 and a mixing tube 7 in an essentially axial orientation for filling a fuel reservoir of the fuel delivery unit 1 with fuel.
  • the fuel return is fed to the Venturi nozzle 6 via a hose 14 which is pushed onto an inlet connection 12 of the Venturi tube section.
  • the mixing tube in which the propellant jet from the Venturi nozzle 6 is mixed with the surrounding fuel of the fuel tank and fed to the fuel delivery unit via the check valve 17, is an integral part of the housing 18 of the fuel delivery unit 1.
  • the housing 18 is supported Using the support lug 16 on the bottom 8 of the fuel tank 2.
  • the mixing tube 7 is thus lifted from the bottom 8 of the fuel tank 2, so that a considerable amount of fuel in the fuel tank 2 cannot be detected by the suction jet pump 4.
  • the object of the invention is to improve the pumping of fuel from a fuel tank with the support of a suction jet pump.
  • the device according to the invention for fuel delivery by means of a fuel delivery unit with the features of claim 1 has the advantage over the prior art that no distance between the suction jet pump and the bottom of the fuel tank is permitted, so that the tank can be pumped empty much more effectively .
  • the function of the fuel delivery unit can advantageously be checked with a minimal amount of fuel in the fuel tank.
  • the residual suction behavior of the suction jet pump is optimized, since the driving jet is arranged in the lowest possible position and thus largely transports the fuel in the tank into the reservoir of the fuel delivery unit.
  • a complicated check valve as is known from the prior art, can be dispensed with if a riser pipe attachment in the fuel delivery unit is connected to the mixing pipe. This advantageously ensures that fuel can flow into the reservoir of the fuel delivery unit as soon as the riser insert has been overcome, even without the support of the propellant jet by a propellant quantity that is only available when the fuel is returned.
  • the mixing tube is arranged in the base region of the fuel delivery unit and connected to it.
  • the housing of the fuel delivery unit in the bottom area forms a unit with the mixing tube and a safe positioning with respect to the bottom area of the fuel tank is possible.
  • the fuel tank is a fuel tank of a motor vehicle and a feed line is arranged in the fuel flow between an internal combustion engine of the motor vehicle and the fuel delivery unit.
  • the fuel delivery unit has an electric fuel pump for the fuel flow, the suction opening of which is arranged in the fuel reservoir filled by the suction jet pump.
  • the suction jet pump a fuel filter can in an advantageous manner between the suction opening of the electric fuel pump and the mixing tube be arranged to floating particles from the bottom portion of the fuel tank stuntdratern before the fuel of the internal combustion engine to • * g & e-leads is.
  • the Venturi nozzle can be arranged on the fuel tank bottom in such a way that its propellant jet acts in the bottom region of the fuel tank.
  • slot-shaped Venturi nozzles which generate a band-shaped propellant jet in the base area and interact with a mixing tube with an oval or elliptical cross section, can achieve a considerable reduction in the amount of residual fuel in a fuel tank.
  • an angling of the driving jet in rieh tion on the near-ground area of the mixing tube is conceivable in order to optimize the emptying of the fuel tank.
  • the Venturi nozzle and the mixing tube may be in a common housing, which is preferably an integral part of the fuel delivery unit is> are arranged. With such an arrangement, misalignments and displacements of the Venturi nozzle with respect to the mixing tube are advantageously avoided and a long service life of the suction jet pump is ensured.
  • the mixing tube is an integral part of the housing of the fuel delivery unit and the Venturi nozzle is releasably attachable to the fuel delivery unit.
  • the Venturi nozzle is easily exchangeable and its shape can be adapted to the different fuel return conditions which are dependent on the internal combustion engine.
  • the end of a feed line of the fuel return to the suction jet pump can preferably be plugged onto an inlet connection of the Venturi tube section.
  • a bypass for the fuel return which is secured by means of a check valve, is arranged between an upstream region of the venturi tube section and the fuel reservoir.
  • Fig. 1 shows a device according to the prior art, as on page
  • FIG. 2 shows the design of a device according to the invention in detail; and
  • FIG. 3 shows a cross section along the section line A-A of FIG. 2.
  • Fig. 2 shows an embodiment of the device according fmdungs it to fuel delivery by a fuel delivery unit 1. From this fuel delivery unit 1 is illustrated material-feed unit 1, only a portion of the bottom portion of the force ⁇ .
  • the fuel delivery unit 1 is its ⁇ hand, on the floor 8 of a fuel tank 2 and is' therefore of motor ⁇ material surrounded.
  • the fuel is supplied from the fuel delivery unit 1 to an internal combustion engine by means of a fuel delivery pump, not shown.
  • the residual fuel in a fuel tank to completely as possible in a fuel reservoir of the fuel delivery unit 1 are GESAM ⁇ melt to use optimally as possible to a fuel tank 2 and in order to leave a minimal residual amounts of fuel in the fuel tank.
  • the fuel delivery unit is in the bottom area of the latter preferred embodiment, a suction jet pump arranged in a fuel return.
  • the suction jet pump 4 consists of a Venturi tube section 5 and a Venturi nozzle 6.
  • the amount of propellant that generates a propellant jet 11 in the Venturi nozzle is supplied through the fuel return 3 in the Venturi tube section 5.
  • the fuel return 3 consists of a hose 14 which is attached to an inlet connection 12 of the venturi tube section 5.
  • the outer diameter of the Venturi tube section 5, which carries the Venturi nozzle 6, and the hose 14 are matched to one another such that the Venturi tube 6 with its Venturi tube section 5 touches the bottom 8 of the fuel tank.
  • the propellant jet generated in the Venturi nozzle 6 sucks the fuel in the bottom region of the fuel tank through side openings and presses the fuel into the fuel delivery unit 1 via a mixing tube 7. Because of this pressure, a higher fuel level than the fuel level in the fuel tank can occur in the fuel delivery unit be kept with decreasing fuel supply. A minimum level of fuel in the fuel delivery unit can be maintained by means of a riser pipe attachment that connects to the mixing tube in the fuel delivery unit or by a check valve, as is known from the prior art.
  • the mixing tube is an integral part of the housing 18 of the fuel delivery unit 1 and touches the bottom 8 of the fuel tank. This means that the fuel is pumped from the fuel tank to a minimal residue into the fuel delivery unit 1 with the aid of the suction jet pump 4 and made available to the internal combustion engine.
  • FIG. 3 shows a cross section along the section line AA through the suction jet pump 4.
  • This cross section illustrates with arrows B the amount of propellant and its direction of flow, which is provided by the fuel return and into the venturi tube section 5 of the suction jet. inflows pump 4.
  • the arrow C shows the direction of the suction jet as it emerged from the Venturi nozzle 6 and enters the mixing tube 7.
  • Fuel is entrained from the floor area through the lateral openings 9 and 10 of the suction jet pump, as shown by the arrows D to K.
  • the mixture of propellant jet and entrained fuel from the bottom area is fed in the direction of arrow D in the mixing tube 7 of the fuel delivery unit and flows out of the mixing tube with the arrow F.
  • FIG. 3 clearly shows that a suction jet pump arranged according to the invention pumps out the bottom area of a fuel tank much more thoroughly than is previously known from the prior art.
  • the Venturi nozzle shown here in FIGS. 2 and 3 is arranged coaxially to the pipe section and forms a circular cross section.
  • both oval and slit-shaped cross sections of the Venturi nozzle can be used to further flatten a suction jet pump.
  • the driving jet 11, which flows parallel to the bottom 8 of the fuel tank in FIG. 2 can be angled by special design of the Venturi nozzle, so that it touches the bottom region of the mixing tube downstream and can thus achieve a further emptying of the fuel tank.
  • the cross section of the mixing tube can be adapted to the cross section of the driving jet, so that its overall height is further reduced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Jet Pumps And Other Pumps (AREA)

Abstract

L'invention concerne un dispositif pour assurer une alimentation en carburant au moyen d'une unité d'alimentation en carburant dans un réservoir de carburant. Cette unité présente une pompe à carburant pour une arrivée de carburant, une pompe à jet aspirant (4) placée dans une conduite de retour de carburant et comportant une section à venturi (5) qui comprend un venturi (6) et un tube de mélange (7) à orientation pratiquement axiale pour remplir de carburant le réservoir de carburant de l'unité d'alimentation en carburant. Le tube de mélange (7) de la pompe à jet aspirant (4) est en contact essentiellement avec le fond (8) du réservoir de carburant, et la pompe à jet aspirant (4) présente, au niveau du fond, des ouvertures latérales pour aspirer du carburant dans la zone de fond du réservoir de carburant. Un dispositif de ce type assure un vidage optimal du réservoir de carburant et une utilisation optimale du contenu du réservoir de carburant.
PCT/DE1999/001847 1998-06-29 1999-06-25 Dispositif pour assurer une alimentation en carburant au moyen d'une unite d'alimentation en carburant WO2000000733A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1998128934 DE19828934C2 (de) 1998-06-29 1998-06-29 Vorrichtung zur Kraftstoff-Förderung mittels einer Kraftstoff-Fördereinheit
DE19828934.0 1998-06-29

Publications (1)

Publication Number Publication Date
WO2000000733A1 true WO2000000733A1 (fr) 2000-01-06

Family

ID=7872365

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1999/001847 WO2000000733A1 (fr) 1998-06-29 1999-06-25 Dispositif pour assurer une alimentation en carburant au moyen d'une unite d'alimentation en carburant

Country Status (2)

Country Link
DE (1) DE19828934C2 (fr)
WO (1) WO2000000733A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008007204B4 (de) 2008-02-01 2018-04-19 Robert Bosch Gmbh Saugstrahlpumpe

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2401728A1 (de) * 1974-01-15 1975-07-17 Daimler Benz Ag Im kraftstofftank eines kraftfahrzeuges angeordneter runder beruhigungstopf
EP0588198A1 (fr) * 1992-09-16 1994-03-23 SICEB S.p.A. Bol anti-désamorçage pour le réservoir de carburant d'un véhicule à moteur
EP0694691A1 (fr) * 1994-07-28 1996-01-31 Robert Bosch Gmbh Dispositif d'alimentation de combustible d'un réservoir vers un moteur à combustion interne d'un véhicle automobile

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4242242C2 (de) * 1992-12-15 2003-04-30 Bosch Gmbh Robert Vorrichtung zum Versorgen der Brennkraftmaschine eines Kraftfahrzeuges mit in einem Vorratstank vorhandenem Kraftstoff

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2401728A1 (de) * 1974-01-15 1975-07-17 Daimler Benz Ag Im kraftstofftank eines kraftfahrzeuges angeordneter runder beruhigungstopf
EP0588198A1 (fr) * 1992-09-16 1994-03-23 SICEB S.p.A. Bol anti-désamorçage pour le réservoir de carburant d'un véhicule à moteur
EP0694691A1 (fr) * 1994-07-28 1996-01-31 Robert Bosch Gmbh Dispositif d'alimentation de combustible d'un réservoir vers un moteur à combustion interne d'un véhicle automobile

Also Published As

Publication number Publication date
DE19828934A1 (de) 2000-02-03
DE19828934C2 (de) 2002-09-19

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