EP0772745B1 - Kraftstoffördereinrichtung mit einer saugstrahlpumpe - Google Patents

Kraftstoffördereinrichtung mit einer saugstrahlpumpe Download PDF

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Publication number
EP0772745B1
EP0772745B1 EP96900505A EP96900505A EP0772745B1 EP 0772745 B1 EP0772745 B1 EP 0772745B1 EP 96900505 A EP96900505 A EP 96900505A EP 96900505 A EP96900505 A EP 96900505A EP 0772745 B1 EP0772745 B1 EP 0772745B1
Authority
EP
European Patent Office
Prior art keywords
fuel
mixing tube
jet pump
nozzle
container
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.)
Expired - Lifetime
Application number
EP96900505A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0772745A1 (de
Inventor
Willi Strohl
Rolf Fischerkeller
Georg Haussler
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.)
Robert Bosch GmbH
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 EP0772745A1 publication Critical patent/EP0772745A1/de
Application granted granted Critical
Publication of EP0772745B1 publication Critical patent/EP0772745B1/de
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
    • F02M37/02—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
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
    • F04F5/46—Arrangements of nozzles
    • 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

Definitions

  • the invention relates to a fuel delivery device according to the Genus of claim 1.
  • Such a fuel delivery device is known from GB-A-2 271 327 known.
  • This fuel delivery device has a fuel storage tank on, in which a container is arranged which a fuel pump delivers.
  • the fuel delivery device also has a suction jet pump for fuel with a nozzle connected to a fuel line and one of these downstream mixing tube, between which one Opening is formed through the fuel emerging from the nozzle the suction jet pump surrounding fuel into the mixing tube carries along.
  • the suction jet pump turns fuel out of the Fuel tank is pumped into the tank.
  • the mixing tube has a beveled end area facing away from the nozzle Opening up, which is in the installation position of the mixing tube extends in its upper peripheral region.
  • the mixing tube protrudes into a vertically running fuel line, which in one upper area of the container opens.
  • the beveled Opening of the mixing tube is made of this escaping fuel deflected into the vertical fuel line.
  • the fuel line to which the nozzle is connected is one Return line through which too much is conveyed by the conveyor unit Fuel is returned to the storage tank.
  • Fuel flowing through the return line is often strong heated so that it outgasses at the suction jet pump and steam bubbles can arise that impair the operation of the suction jet pump, so this doesn't have enough fuel in the tank promotes.
  • the vapor bubbles flow through the vertical Fuel line up into the tank and obstruct possibly the flow of the fuel delivered in the vertical fuel line.
  • the fuel delivery device with the features according to claim 1 has the advantage that The gas jet produced by the suction jet pump when entering the Container through the at least one opening of the mixing tube can escape at the top and thus the operation of the suction jet pump is ensured even with heated fuel.
  • FIG. 1 shows a detail of a fuel storage tank with a suction jet pump arranged in it
  • 2 shows a longitudinal section by the suction jet pump according to a first embodiment in an enlarged view
  • Figure 3 detail a view of the suction jet pump of Figure 2 in the direction of the arrow III
  • Figure 4 a section of a longitudinal section the suction jet pump according to a second embodiment
  • Figure 5 shows a partial view of the suction jet pump of Figure 4 in the direction of arrow V in Figure 4
  • Figure 6 in sections a view of the suction jet pump according to one third embodiment.
  • FIG. 1 shows a fuel delivery device with a fuel storage tank 10 of a motor vehicle shown in the near the bottom 11 of a container 12 is arranged.
  • An assembly 14 sucks from the container 12 at, the fuel, which is known to be an evaporation critical Liquid is to the engine 16 of the motor vehicle promotes.
  • the delivery unit 14 delivers more fuel than the engine 16 consumes and the excess Fuel passes through a return line 18 back to the storage tank 10.
  • To the return line 18 is a suction jet pump arranged near the bottom 11 of the storage tank 10 20 connected.
  • the suction jet pump 20 has a nozzle 22 connected to the return line 18, which is designed as a Venturi tube and a mouth section 23 with compared to the clear cross section of the return line 18 has a reduced mouth cross section.
  • the nozzle 22 With axial distance, the nozzle 22 is followed by a mixing tube 26, whose clear cross-section is larger than the mouth cross-section the nozzle 22.
  • a mixing tube 26 By the axial distance between the nozzle 22 and the mixing tube 26 is between these two Share an opening 27, for example in the form of a Annular gap through which fuel from the storage tank 10th can get into the mixing tube 26.
  • the nozzle 22 is outside of the container 12 arranged in the storage tank 10 and the mixing tube 26 protrudes with its nozzle 22 facing away End region 28 through a side wall 13 into the container 12 in.
  • the mixing tube 26 can be inside the container 12 a check valve, not shown, may be assigned, which prevents fuel from coming out of the tank 12 flows through the mixing tube 26.
  • the unit 14 delivers fuel the container 12 to the internal combustion engine 16.
  • the of the Internal combustion engine 16 reaches unused amount of fuel via the return line 18 back into the storage tank 10.
  • the flowing through the return line 18, under the standing fuel generated by the delivery unit 14 delivery pressure flows out through the mouth section 23 of the nozzle 22 and tears fuel from the storage tank 10 through the Opening 27 in the mixing tube 26 with.
  • the suction jet pump 20 thus becomes in addition to that via the return line 18 flowing fuel still fuel from the storage tank 10 promoted in the container 12, in which thus constantly one sufficient for the operation of the internal combustion engine 16 Amount of fuel.
  • the suction jet pump 20 can also be used in a jagged storage tank 10 at which the container 12 is arranged in an area of the storage tank 10 is that of other areas of the storage tank is separated by humps or other bumps, so that from No fuel in these areas in the area with the tank 12 can flow. In this case, the suction jet pump 20 fuel from the other areas of the storage tank 10 promoted in the area where the container 12 is arranged.
  • the suction jet pump 20 is according to one first embodiment shown.
  • Figure 2 is sections of the nozzle 22 with its mouth section 23 and the mixing tube penetrating the wall 13 of the container 12 26 shown.
  • the mixing tube 26 has in its End region facing away from nozzle 22 and arranged in container 12 28 has an opening in its upper peripheral region in the installed position in the form of a slot 30.
  • the slot 30 runs starting from the end of the mixing tube 26 approximately parallel to it Longitudinal axis 29.
  • the width of the slot 30 can, as in Figure 3, be approximately constant over its length or change along its length.
  • the through the return line 18 from the internal combustion engine 16 into the storage tank 10 returning fuel may be very hot, so that when the fuel flows out of the nozzle 22 gas bubbles arise, which get into the mixing tube 26.
  • the gas bubbles can pass through the slot 30 in the container 12 escape upwards, so that the fuel delivery in the Container 12 is not affected or only slightly affected by the gas bubbles becomes.
  • the suction jet pump 120 is according to one shown second embodiment, in which only that Mixing tube 126 modified compared to the first embodiment but the remaining parts of the suction jet pump 120 are unchanged.
  • the mixing tube 126 protrudes with the nozzle 22 opposite end through the wall 13 into the container 12 inside.
  • In its end region 128 arranged in the container 12 has the mixing tube 126 on its upper peripheral region in the installed position an opening 130 formed by the end area 128 is provided with a bevel 132.
  • the bevel 132 runs towards the end of the mixing tube 126 inclined to the longitudinal axis 129 of the mixing tube 126.
  • This arrangement of the bevel 132 increases Cross section of the opening 130 towards the end of the mixing tube 126. Gas bubbles can also emerge from the mixing tube through the opening 130 126 exit upwards, so that the operation of the suction jet pump 120 influenced by this or little becomes.
  • FIG 6 is a third embodiment of the suction jet pump 220 shown, in which the mixing tube 226 in its end region 228 has a plurality of openings 230 on its circumference having distributed over the circumference of the mixing tube 226 are arranged and / or in the direction of the longitudinal axis 229 of the Mixing tube 226 are arranged offset to one another.
  • the Cross-sectional shapes of the openings 230 can be arbitrary be.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP96900505A 1995-02-11 1996-01-11 Kraftstoffördereinrichtung mit einer saugstrahlpumpe Expired - Lifetime EP0772745B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19504565 1995-02-11
DE19504565A DE19504565A1 (de) 1995-02-11 1995-02-11 Saugstrahlpumpe
PCT/DE1996/000029 WO1996024773A1 (de) 1995-02-11 1996-01-11 Saugstrahlpumpe

Publications (2)

Publication Number Publication Date
EP0772745A1 EP0772745A1 (de) 1997-05-14
EP0772745B1 true EP0772745B1 (de) 1999-04-21

Family

ID=7753712

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96900505A Expired - Lifetime EP0772745B1 (de) 1995-02-11 1996-01-11 Kraftstoffördereinrichtung mit einer saugstrahlpumpe

Country Status (7)

Country Link
EP (1) EP0772745B1 (ja)
JP (1) JPH09512324A (ja)
KR (1) KR970701834A (ja)
CN (1) CN1077248C (ja)
BR (1) BR9605303A (ja)
DE (2) DE19504565A1 (ja)
WO (1) WO1996024773A1 (ja)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19833130A1 (de) * 1998-07-23 2000-01-27 Bosch Gmbh Robert Vorrichtung zum Fördern von Kraftstoff aus einem Vorratsbehälter zur Brennkraftmaschine eines Kraftfahrzeugs
DE19835157C1 (de) * 1998-08-04 2000-03-02 Daimler Chrysler Ag Saugstrahlpumpe
JP3638818B2 (ja) * 1999-05-20 2005-04-13 愛三工業株式会社 ウエスコ型ポンプ
DE19950289A1 (de) 1999-10-19 2001-04-26 Bosch Gmbh Robert Kraftstoffversorgungseinrichtung für eine Brennkraftmaschine eines Kraftfahrzeugs
DE10119553B4 (de) * 2001-04-21 2005-06-23 Siemens Ag Saugstrahlpumpe und Verfahren zur Herstellung einer Düse für eine Saugstrahlpumpe

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE904984C (de) * 1943-08-18 1954-02-25 Eberspaecher J Schallgedaempfter Injektor mit pulsierendem gasfoermigem oder fluessigem Treibstrom
US3223140A (en) * 1964-01-16 1965-12-14 Oliver R Jones Self-controlled fuel system
GB1109232A (en) * 1965-02-13 1968-04-10 Taylor & Osborne Ltd Improvements relating to venturi extractors
US4834132A (en) * 1986-09-25 1989-05-30 Nissan Motor Company, Limited Fuel transfer apparatus
JP2820727B2 (ja) * 1989-08-07 1998-11-05 株式会社デンソー 車両用燃料供給装置
DE9116296U1 (de) * 1991-04-08 1992-07-23 Vdo Adolf Schindling Ag, 6000 Frankfurt Kraftstoffbehälteranlage
JP3067058B2 (ja) * 1992-03-27 2000-07-17 株式会社クラレ 樹脂補強用不織布
GB2271327A (en) * 1992-10-10 1994-04-13 Ford Motor Co A fuel tank reservoir.
DE4336060C2 (de) * 1993-10-22 2003-06-26 Siemens Ag Kraftstoff-Fördereinrichtung für eine Brennkraftmaschine

Also Published As

Publication number Publication date
CN1077248C (zh) 2002-01-02
JPH09512324A (ja) 1997-12-09
EP0772745A1 (de) 1997-05-14
WO1996024773A1 (de) 1996-08-15
BR9605303A (pt) 1997-10-14
KR970701834A (ko) 1997-04-12
DE19504565A1 (de) 1996-08-14
CN1145660A (zh) 1997-03-19
DE59601703D1 (de) 1999-05-27

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