US20040052654A1 - Fuel pump for a motor vehicle - Google Patents

Fuel pump for a motor vehicle Download PDF

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Publication number
US20040052654A1
US20040052654A1 US10/450,262 US45026203A US2004052654A1 US 20040052654 A1 US20040052654 A1 US 20040052654A1 US 45026203 A US45026203 A US 45026203A US 2004052654 A1 US2004052654 A1 US 2004052654A1
Authority
US
United States
Prior art keywords
fuel
fuel pump
main stage
stage
electric motor
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.)
Abandoned
Application number
US10/450,262
Other languages
English (en)
Inventor
Rolf Reinhardt
Thomas Werner
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.)
Siemens AG
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Assigned to SIEMENS AG reassignment SIEMENS AG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: REINHARDT, ROLF, WERNER, THOMAS
Publication of US20040052654A1 publication Critical patent/US20040052654A1/en
Abandoned 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
    • F02M37/04—Feeding by means of driven pumps
    • F02M37/18—Feeding by means of driven pumps characterised by provision of main and auxiliary pumps
    • 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
    • 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 pump for a motor vehicle, comprising a preliminary stage and a main stage for delivering the fuel to an internal combustion engine of the motor vehicle, and an electric motor for driving the preliminary stage and main stage.
  • Fuel pumps of this type which are known for petrol or diesel fuel are frequently used in motor vehicles today.
  • the fuel pump as a rule forms a pre-assemblable, structural unit together with a flange which is to be inserted into an opening in the fuel tank.
  • the flange bears a connecting branch to which a forward-flow line leading to the internal combustion engine can be connected, and a connecting branch for a return-flow line leading back from the internal combustion engine.
  • the fuel fed back from the internal combustion engine is subsequently fed to the fuel tank or to a surge chamber.
  • the preliminary stage and the main stage are frequently designed in each case as a side-channel pump or peripheral pump, through which the flow passes axially, and are arranged together at that end of the electric motor which points towards the bottom region of the surge chamber.
  • a shaft of the electric motor drives an impeller of the preliminary stage and an impeller of the main stage in each case.
  • the preliminary stage and the main stage are arranged in a common housing together with the electric motor. The fuel delivered by the main stage flows through the electric motor.
  • a further disadvantage resides in the fact that the fuel delivered by the main stage swirls as it flows through the electric motor. As a result, the fuel has the tendency to form vapor bubbles which, together with the fuel, form a foam which negatively affects the reliable supply of the internal combustion engine with fuel.
  • the invention is based on the problems of designing a fuel pump of the type mentioned at the beginning in such a manner that the electric motor of the fuel pump is no longer thermally stressed by the fuel and a rapid and reliable supply of the internal combustion engine with fuel is ensured.
  • the main stage of the fuel pump is connected directly to the forward-flow line to the internal combustion engine and is fluidly decoupled from the electric motor.
  • the suction branch of the main stage has a connection to a component which is filled with fuel by the preliminary stage, in particular to a surge chamber or a fuel filter.
  • One advantage of the fuel pump according to the invention resides in the fact that the volume of the forward-flow line between the main stage and the internal combustion engine can be kept very small.
  • the air cushion in previous fuel pumps which forms in the electric motor between the forward-flow line and the main stage when the fuel pump is at a standstill is avoided. Therefore, when the internal combustion engine is started with a virtually empty fuel tank, a delay in the delivery of the fuel to the internal combustion engine is kept particularly small.
  • fuel recycled to the surge chamber or the fuel tank from the internal combustion engine can be fed at a higher temperature, since, with renewed delivery through the main stage, the fuel which is now hot as a consequence of the heating is no longer guided through the electric motor, but directly into the forward-flow line.
  • the main stage is arranged on that side of the electric motor which lies opposite the preliminary stage.
  • this arrangement has the advantage of this fuel pump being very quiet, since the main stage which is primarily responsible for the formation of noise has been moved further away from the bottom of the fuel tank.
  • the discharge line of the preliminary stage opens into a surge chamber approximately level with the main stage or above the suction branch. It is thereby ensured that, firstly, there is always a sufficient amount of fuel available in the surge chamber for the main stage, and that, secondly, the main stage is always filled with fuel, or at least immediately sucks in fuel during the starting procedure, and therefore delivers fuel without delay once the electric motor has started.
  • sucking-in of foamed fuel foam present in the surge chamber can be largely avoided if the main stage has a suction line which is guided outside the electric motor into the bottom region of the surge chamber.
  • the fuel pump according to the invention can be fitted in a particularly simple manner if the main stage has, on its side facing away from the electric motor, a flange having a respective connecting branch for the suction line and the forward-flow line of said main stage.
  • the discharge line of the preliminary stage is advantageously guided through the electric motor.
  • this at the same time enables the bearing points to be lubricated and the carbon-collector system to be cooled.
  • it is crucial that the fuel fuel heated thereby and tending to give off gas is settled down again by the delivery to a component, with the result that bubble-free fuel is sucked in from this component via the suction branch of the main stage.
  • the invention permits numerous embodiments. To further clarify its basic principle, two of these are illustrated in the drawings and are described below. In the drawings
  • FIG. 1 shows a longitudinal section through a fuel pump
  • FIG. 2 shows a longitudinal section through a different design of fuel pump.
  • FIG. 1 There is arranged in FIG. 1 fuel pump 3 fitted in a surge chamber 2 arranged near to a bottom of a fuel tank 1 .
  • the fuel pump 3 has a housing 4 which is manufactured from aluminum or steel and has an electric motor 5 arranged in it.
  • the electric motor 5 serves for driving a preliminary stage 6 and a main stage 7 .
  • the preliminary stage 6 is arranged near to a bottom of the surge chamber 2 , while the main stage 7 is situated on the opposite side of the electric motor 5 .
  • the surge chamber 2 has, in its bottom region, an opening 8 into which the fuel pump 3 is inserted in a sealing manner.
  • a respective fuel filter 9 , 10 is situated below the surge chamber 2 and in the upper region thereof.
  • the preliminary stage 6 and the main stage 7 are designed as side-channel pumps and have a respective impeller 12 , 13 fastened on a shaft 11 of the electric motor 5 .
  • the preliminary stage 6 is connected to the fuel filter 9 , which is arranged below the surge chamber 2 , via a suction line 14 and is connected to the surge chamber 2 via a discharge line 15 .
  • the preliminary stage 6 When the preliminary stage 6 is being driven by the electric motor 5 , the preliminary stage 6 therefore sucks in fuel from the fuel tank 1 and delivers it into the surge chamber 2 .
  • the discharge line 15 is guided here through the electric motor 5 and ends level with the main stage 7 .
  • the main stage 7 has, on its side facing away from the electric motor 5 , a discharge branch 16 for a forward-flow line 17 and a suction branch 18 which is arranged on the circumference of the fuel pump 3 and is intended for a suction line 19 .
  • the suction line 19 is guided into the bottom region of the surge chamber 2 and sucks in the fuel from there.
  • the forward-flow line is guided upward within the fuel tank 1 .
  • Fuel delivered via the forward-flow line 17 passes to an internal combustion engine (not illustrated) of the motor vehicle.
  • Fuel which is not required is conducted via a return flow 20 into the surge chamber 2 . This fuel is delivered again to the internal combustion engine by the main stage 7 via the suction line 19 without again flowing through the electric motor 5 .
  • FIG. 2 shows a structurally altered design of the fuel pump 3 according to the invention.
  • the fuel pump 3 is arranged in a fuel tank 1 .
  • the discharge line 15 of the preliminary stage 6 is guided through the electric motor 5 to a fine fuel filter 21 .
  • the main stage 7 is a Gerotor pump.
  • the branches 16 , 18 for the suction line 19 and the forward-flow line 17 are arranged on that side of the main stage 7 which faces away from the electric motor 5 .
  • the fuel is sucked in from there through the suction branch 18 by the main stage 17 and is passed on to the internal combustion engine via the forward-flow line 17 .
  • Fuel which is not required is conducted into the fuel tank 1 via a return flow 20 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
US10/450,262 2000-12-14 2001-12-13 Fuel pump for a motor vehicle Abandoned US20040052654A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10062452A DE10062452A1 (de) 2000-12-14 2000-12-14 Kraftstoffpumpe für ein Kraftfahrzeug
DE10062452.9 2000-12-14
PCT/DE2001/004674 WO2002048535A1 (fr) 2000-12-14 2001-12-13 Pompe a carburant pour vehicule automobile

Publications (1)

Publication Number Publication Date
US20040052654A1 true US20040052654A1 (en) 2004-03-18

Family

ID=7667222

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/450,262 Abandoned US20040052654A1 (en) 2000-12-14 2001-12-13 Fuel pump for a motor vehicle

Country Status (9)

Country Link
US (1) US20040052654A1 (fr)
EP (1) EP1342002B1 (fr)
JP (1) JP2004515705A (fr)
KR (1) KR20030068554A (fr)
CN (1) CN1481473A (fr)
BR (1) BR0116137A (fr)
DE (2) DE10062452A1 (fr)
ES (1) ES2223009T3 (fr)
WO (1) WO2002048535A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140224216A1 (en) * 2013-02-11 2014-08-14 Winfield Coachman Anti-surge tank housed within a fuel vessel
US11067044B2 (en) * 2016-09-16 2021-07-20 Vitesco Technologies GmbH Fluid conveying device

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4875398B2 (ja) * 2006-04-21 2012-02-15 株式会社ケーヒン 燃料供給モジュール
KR100974309B1 (ko) * 2008-08-22 2010-08-05 김명숙 시가 잭
US20150176541A1 (en) * 2012-07-31 2015-06-25 Toyota Jidosha Kabushiki Kaisha Evaporated fuel processing device

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3094272A (en) * 1960-12-09 1963-06-18 Trane Co Motor-compressor apparatus
US4558992A (en) * 1982-11-06 1985-12-17 Mitsubishi Denki Kabushiki Kaisha Pump device
US5111844A (en) * 1991-10-28 1992-05-12 General Motors Corporation Automotive fuel system
US6012904A (en) * 1994-05-17 2000-01-11 Walbro Corporation Vented fuel module reservoir with two-stage pump
US6397822B1 (en) * 2000-04-18 2002-06-04 Uis, Inc. Integrated fuel system unit with two-stage marine fuel pump
US6511298B2 (en) * 2000-02-08 2003-01-28 Toshiba Tec Kabushiki Kaisha Electric motor pump with axial-flow impellers
US6514053B2 (en) * 2000-02-10 2003-02-04 Toshiba Tec Kabushiki Kaisha Motor-driven pump with a plurality of impellers

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9104511U1 (de) * 1991-04-13 1992-08-13 Robert Bosch Gmbh, 7000 Stuttgart Vorrichtung zum Fördern von Kraftstoff aus einem Vorratstank zur Brennkraftmaschine eines Kraftfahrzeugs
DE4425670C2 (de) * 1994-07-20 2000-08-24 Mannesmann Vdo Ag Kraftstoff-Versorgungseinheit für ein Kraftfahrzeug mit Dieselmotor
DE19530421A1 (de) * 1995-08-18 1997-02-20 Vdo Schindling Fördereinheit
US5809975A (en) * 1996-05-06 1998-09-22 Walbro Corporation In tank fuel pump and reservoir with stand pipe
DE19627581A1 (de) * 1996-07-09 1998-01-15 Pierburg Ag Anordnung einer Brennstoffpumpe

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3094272A (en) * 1960-12-09 1963-06-18 Trane Co Motor-compressor apparatus
US4558992A (en) * 1982-11-06 1985-12-17 Mitsubishi Denki Kabushiki Kaisha Pump device
US5111844A (en) * 1991-10-28 1992-05-12 General Motors Corporation Automotive fuel system
US6012904A (en) * 1994-05-17 2000-01-11 Walbro Corporation Vented fuel module reservoir with two-stage pump
US6511298B2 (en) * 2000-02-08 2003-01-28 Toshiba Tec Kabushiki Kaisha Electric motor pump with axial-flow impellers
US6514053B2 (en) * 2000-02-10 2003-02-04 Toshiba Tec Kabushiki Kaisha Motor-driven pump with a plurality of impellers
US6397822B1 (en) * 2000-04-18 2002-06-04 Uis, Inc. Integrated fuel system unit with two-stage marine fuel pump

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140224216A1 (en) * 2013-02-11 2014-08-14 Winfield Coachman Anti-surge tank housed within a fuel vessel
US9200603B2 (en) * 2013-02-11 2015-12-01 Coachman Performance, Llc Anti-surge tank housed within a fuel vessel
US11067044B2 (en) * 2016-09-16 2021-07-20 Vitesco Technologies GmbH Fluid conveying device

Also Published As

Publication number Publication date
JP2004515705A (ja) 2004-05-27
EP1342002A1 (fr) 2003-09-10
DE10062452A1 (de) 2002-06-20
KR20030068554A (ko) 2003-08-21
BR0116137A (pt) 2003-10-21
DE50102559D1 (de) 2004-07-15
ES2223009T3 (es) 2005-02-16
CN1481473A (zh) 2004-03-10
WO2002048535A1 (fr) 2002-06-20
EP1342002B1 (fr) 2004-06-09

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Legal Events

Date Code Title Description
AS Assignment

Owner name: SIEMENS AG, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:REINHARDT, ROLF;WERNER, THOMAS;REEL/FRAME:014722/0498

Effective date: 20030610

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION