EP1342002A1 - Pompe a carburant pour vehicule automobile - Google Patents

Pompe a carburant pour vehicule automobile

Info

Publication number
EP1342002A1
EP1342002A1 EP01984705A EP01984705A EP1342002A1 EP 1342002 A1 EP1342002 A1 EP 1342002A1 EP 01984705 A EP01984705 A EP 01984705A EP 01984705 A EP01984705 A EP 01984705A EP 1342002 A1 EP1342002 A1 EP 1342002A1
Authority
EP
European Patent Office
Prior art keywords
fuel
fuel pump
stage
electric motor
main stage
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
EP01984705A
Other languages
German (de)
English (en)
Other versions
EP1342002B1 (fr
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
Publication of EP1342002A1 publication Critical patent/EP1342002A1/fr
Application granted granted Critical
Publication of EP1342002B1 publication Critical patent/EP1342002B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • F02M37/04—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, consisting of a preliminary stage and a main stage for conveying the fuel to an internal combustion engine of the motor vehicle and an electric motor for driving the preliminary stage and main stage.
  • the fuel pump generally forms a preassembled structural unit with a flange to be inserted into an opening in the fuel tank.
  • the flange carries a connecting piece to which a flow line leading to the internal combustion engine can be connected, and a connecting piece for a return line leading back from the internal combustion engine.
  • the fuel returned by the internal combustion engine is then fed to the fuel tank or a baffle.
  • the preliminary stage and the main stage are often each designed as axially flow-through side channel pumps or peripheral pumps and are arranged together at the end of the electric motor facing the bottom region of the swirl pot.
  • a shaft of the electric motor drives an impeller of the pre-stage and the main stage.
  • the preliminary stage and the main stage are arranged together with the electric motor in a common housing.
  • the fuel delivered by the main stage flows through the electric motor.
  • a disadvantage of known fuel pumps is that fuel which is not required on the internal combustion engine but is heated by it is fed back into the swirl pot via the return line. With renewed funding this fuel by the fuel pump, the fuel is heated even further, especially in the main stage. This can lead to problems due to the low heat resistance of the electric motor, in particular the coal collector system and the adjacent electrical circuitry. For this reason, the temperature of the fuel after the main stage is limited to a permissible value, or the returned fuel had to be cooled.
  • Another disadvantage is that the fuel delivered by the main stage swirls as it flows through the electric motor. As a result, the fuel tends to form vapor bubbles which form a foam with the fuel, which negatively impairs the reliable supply of fuel to the internal combustion engine.
  • the fuel pump runs empty due to leakage between the main and preliminary stages of the fuel pump, the engine compartment of the fuel pump filling with air between the pressure drop and the main stage. Furthermore, the swirl pot can run empty in the same way up to the level of the main step storage location. As a result of the low fill level in the surge pot when the internal combustion engine is restarted, this leads to relatively long start times or to misfires in the internal combustion engine.
  • the invention is based on the problems of designing a fuel pump of the type mentioned at the outset such that the electric motor of the fuel pump is no longer thermally stressed by the fuel and a quick and safe supply of the internal combustion engine with fuel is ensured.
  • the main stage of the fuel pump is connected directly to the flow line to the internal combustion engine and is fluidly decoupled from the electric motor.
  • the Intake manifold of the main stage connects to a component filled with fuel by the preliminary stage, in particular a baffle or a fuel filter.
  • An advantage of the fuel pump according to the invention is that the volume of the flow line between the main stage and the internal combustion engine can be kept very small.
  • the air cushion in the electric motor that forms between the flow line and the main stage in previous fuel pumps when the fuel pump is at a standstill is avoided. Therefore, a delay in the delivery of the fuel to the internal combustion engine is kept particularly low when the internal combustion engine is started with an almost empty fuel tank.
  • fuel returned from the internal combustion engine can be fed to the swirl pot or the fuel tank at a higher temperature, since when the main stage is pumped again, the fuel that is now hot due to the heating is no longer fed through the electric motor but directly into the feed line. This prevents unnecessary heating of the electric motor. This leads to a particularly long service life of the electric motor.
  • a swirling of the fuel delivered by the main stage by the electric motor is avoided by this design, so that foaming in the supply line is prevented.
  • the fuel pump according to the invention thus ensures a reliable supply of fuel to the internal combustion engine.
  • the main stage is arranged on the side of the electric motor opposite the preliminary stage.
  • this arrangement has the advantage that this fuel pump is very quiet, since the main stage, which is mainly responsible for noise generation, is further away from the bottom of the fuel tank.
  • the pressure line of the preliminary stage opens into a swirl pot approximately at the level of the main stage or above the intake manifold. This ensures that, on the one hand, there is always a sufficient amount of fuel available for the main stage in the surge pot and, on the other hand, that the main stage is always filled with fuel or at least immediately sucks fuel at start-up and therefore delivers fuel immediately after the electric motor is started.
  • suction of foamed fuel foam present in the swirl pot can be largely avoided if the main stage has a suction line that extends outside the electric motor to the bottom area of the swirl pot.
  • the fuel pump according to the invention can be installed particularly easily if the main stage has a flange on its side facing away from the electric motor, each with a connecting piece for its suction line and its supply line.
  • the pressure line of the preliminary stage is advantageously guided through the electric motor.
  • this also enables lubrication of the bearing points and cooling of the coal collector system. It is crucial, however, that the fuel, which is warmed up and tends to outgas, is calmed again by the conveyance to a component, so that bubble-free fuel is drawn in from this component via the intake port of the main stage.
  • a fuel pump 3 is arranged in a swirl pot 2 arranged near a bottom of a fuel tank 1.
  • the fuel pump 3 has a housing 4 made of aluminum or steel with an electric motor 5 arranged therein.
  • the electric motor 5 is used to drive a preliminary stage 6 and a main stage 7.
  • the preliminary stage 6 is arranged near a bottom of the baffle 2, while the main stage 7 is located on the opposite side of the electric motor 5.
  • the baffle 2 has an opening 8 in its bottom region, into which the fuel pump 3 is inserted in a sealing manner.
  • a fuel filter 9, 10 is located below the surge pot 2 and in the upper region thereof. With the fuel level 1 in the fuel tank 1 being sufficiently high, fuel can flow into the surge pot 2 through the upper fuel filter 10.
  • the preliminary stage 6 and the main stage 7 are designed as side channel pumps and each have an impeller 12, 13 fastened on a shaft 11 of the electric motor 5.
  • the preliminary stage 6 is connected via a suction line 14 to the fuel filter 9 arranged below the swirl pot 2 and via a pressure line 15 to the swirl pot 2.
  • the preliminary stage 6 sucks fuel from the fuel tank 1 and delivers it into the surge pot 2.
  • the pressure line 15 is guided through the electric motor 5 and ends at the level of the main stage 7.
  • Die Main stage 7 has, on its side facing away from the electric motor 5, a pressure connection 16 for a feed line 17 and a suction connection 18 arranged on the circumference of the fuel pump 3 for a suction line 19.
  • the suction line 19 is led into the bottom region of the surge pot 2 and sucks the fuel from there on.
  • the flow line is led upwards within the fuel tank 1.
  • Fuel delivered via the feed line 17 arrives at an internal combustion engine (not shown) of the motor vehicle.
  • Fuel that is not required is fed into the surge pot 2 via a return 20. This fuel is conveyed via the suction line 19 from the main stage 7 to the internal combustion engine again without flowing through the electric motor 5 again.
  • FIG. 2 shows an embodiment of the fuel pump 3 according to the invention which has a different design.
  • the fuel pump 3 is arranged in a fuel tank 1.
  • the pressure line 15 of the preliminary stage 6 is led through the electric motor 5 to a fine fuel filter 21.
  • the main stage 7 is a gerotor pump.
  • the connecting pieces 16, 18 for the suction line 19 and the flow line 17 are arranged. From there, the fuel is sucked through the intake port 18 from the main stage 7 and further conveyed via the flow line 17 to the internal combustion engine. Fuel that is not required is fed into the fuel tank 1 via a return 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)

Abstract

L'invention concerne une pompe à carburant (3) montée dans le réservoir à carburant (1) d'un véhicule automobile. Cette pompe à carburant comporte un étage d'entrée (6) entraîné par un moteur électrique (5) et un étage principal (7). Cet étage principal (7) est placé directement en amont d'une conduite d'entrée (17) conduisant au moteur à combustion interne. Le carburant transporté par l'étage principal (7) est aspiré à partir d'un composant (2, 21) dans lequel le carburant a été amené par l'étage d'entrée (6). Etant donné que l'étage principal (7) est situé après le moteur électrique (5), un chauffage non admissible du moteur électrique (5) est évité. En outre, la pompe à carburant (3) permet d'obtenir des temps de démarrage particulièrement courts du moteur à combustion interne.
EP01984705A 2000-12-14 2001-12-13 Pompe a carburant pour vehicule automobile Expired - Lifetime EP1342002B1 (fr)

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 2000-12-14
PCT/DE2001/004674 WO2002048535A1 (fr) 2000-12-14 2001-12-13 Pompe a carburant pour vehicule automobile

Publications (2)

Publication Number Publication Date
EP1342002A1 true EP1342002A1 (fr) 2003-09-10
EP1342002B1 EP1342002B1 (fr) 2004-06-09

Family

ID=7667222

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01984705A Expired - Lifetime EP1342002B1 (fr) 2000-12-14 2001-12-13 Pompe a carburant pour vehicule automobile

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)

Families Citing this family (5)

* 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
WO2014020865A1 (fr) * 2012-07-31 2014-02-06 トヨタ自動車株式会社 Appareil de traitement de vapeur de carburant
US9200603B2 (en) * 2013-02-11 2015-12-01 Coachman Performance, Llc Anti-surge tank housed within a fuel vessel
DE102016217800B4 (de) * 2016-09-16 2021-12-23 Vitesco Technologies GmbH Fluidfördervorrichtung

Family Cites Families (12)

* 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
JPS5971984U (ja) * 1982-11-06 1984-05-16 三菱電機株式会社 ポンプ装置
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
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
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
JP2001221199A (ja) * 2000-02-08 2001-08-17 Toshiba Tec Corp 電動ポンプ
JP3475174B2 (ja) * 2000-02-10 2003-12-08 東芝テック株式会社 電動ポンプ
US6397822B1 (en) * 2000-04-18 2002-06-04 Uis, Inc. Integrated fuel system unit with two-stage marine fuel pump

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0248535A1 *

Also Published As

Publication number Publication date
EP1342002B1 (fr) 2004-06-09
BR0116137A (pt) 2003-10-21
US20040052654A1 (en) 2004-03-18
DE10062452A1 (de) 2002-06-20
ES2223009T3 (es) 2005-02-16
WO2002048535A1 (fr) 2002-06-20
JP2004515705A (ja) 2004-05-27
CN1481473A (zh) 2004-03-10
DE50102559D1 (de) 2004-07-15
KR20030068554A (ko) 2003-08-21

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