EP0524960A1 - Unite d'alimentation en carburant - Google Patents

Unite d'alimentation en carburant

Info

Publication number
EP0524960A1
EP0524960A1 EP19910906161 EP91906161A EP0524960A1 EP 0524960 A1 EP0524960 A1 EP 0524960A1 EP 19910906161 EP19910906161 EP 19910906161 EP 91906161 A EP91906161 A EP 91906161A EP 0524960 A1 EP0524960 A1 EP 0524960A1
Authority
EP
European Patent Office
Prior art keywords
pump
unit according
pinion
net
housing
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.)
Withdrawn
Application number
EP19910906161
Other languages
German (de)
English (en)
Inventor
Hartmuth KRÄMER
Peter Schelhas
Thomas Wünsch
Hans-Peter Braun
Martin Ungerer
Willi Strohl
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 EP0524960A1 publication Critical patent/EP0524960A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
    • F04C11/001—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations of similar working principle
    • 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
    • F02M37/20—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 characterised by means for preventing vapour lock
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0053—Venting means for starting

Definitions

  • the invention is based on a unit for delivering fuel according to the preamble of the main claim.
  • the prefeed pump consists of a flow pump
  • the main pump consists of an internally toothed pump (so-called ge-rotor pump).
  • ge-rotor pump an internally toothed pump
  • the unit according to the invention with the characterizing features of the main claim has the advantage that it brings with it a further improvement in the performance which is placed on such devices. It is hardly larger than the known unit, but much more powerful.
  • 10 denotes the pot-shaped housing of a conveyor unit, which has an elongated connecting piece 11 at one or its lower end.
  • an electric motor 12 Arranged in the interior of the housing is an electric motor 12, of which only the lowest part can be seen, as well as two internal gear pumps 13, 14 of a known type.
  • These parts are located in a separate housing 15, one cover 16 of which is supported on a shoulder 17 of the housing 10.
  • Two sleeves 18, 19 rest on the cover 16 and are separated from one another by a base plate 20.
  • a cover 22 is located opposite the cover 16 on the housing 15, and the named parts are held together by screws 23.
  • In the cover 22 there is an outlet slot 24 through which the fuel delivered flows along the electric motor to the consumer.
  • an inlet slot 25 In the cover 16 there is an inlet slot 25, which communicates with a lower space 26 in the housing 10, which in turn is connected to the connector 11 and an outer tube 28 fastened to it and an inner tube 29 with a fuel tank, both made of fuel-resistant plastic.
  • a drive shaft 30 extends in the interior of the unit and penetrates through a sleeve 32 which is fixedly connected to the base plate 20.
  • a driver 33 which engages with two claws 33A in two slots 34 of the internal gear pump 13 forming the prefeed pump.
  • the inner wheel and outer wheel of the internal gear pump are not specifically identified here, since they are common.
  • In the base plate 20 there is the outlet slot 34 of the internal gear pump 13, which at the same time forms the inlet slot for the internal gear pump 14, the main feed pump.
  • Their pinion is driven by the claws 36 of a driver 37 which is fixedly connected to the drive shaft 30.
  • the delivery rate of the internal gear pump 13 serving as the pre-delivery pump is greater than the delivery rate of the internal gear pump 14 serving as the main stage, so that there is always an excess flow which compresses any gas bubbles which may be present with a corresponding dynamic pressure and thus always ensures that the main stage is completely filled.
  • This excess flow passes through a duct 38 formed on the end of the cover 16 facing the pumps into the socket 29A of the inner tube 29.
  • the return flow is discharged through a throttle 44 or through a correspondingly designed duct region 38 or by means of a line valve which shuts off when a predetermined pressure is reached, a dynamic pressure is built up which in particular compresses gas bubbles which may occur in the hot conveying mode and thus ensures an almost constant conveyance of the main stage.
  • a spring element 39 is provided which has a plurality of spring claws 40, 41 which axially brace the tube 29 between the housing 10 and the cover 16 and further spring jaws 42, 43 which extend far into the socket 11 and serve to center the inner tube.
  • the excess quantity generated by the internal gear pump 13 flows via the channel 38 and via the inner hose 29 to the tank.
  • the channel 38 may have a cross section such that it replaces the throttle 44, that is to say acts as a throttle or diaphragm itself.
  • the embodiment of Figure 2 differs from that of Figure 1 in that the entrainment for the internal gear pump 13 is designed differently. It is essential in this exemplary embodiment that the assembly has a central inner tube 45 which extends into the electric motor and penetrates to the lower edge of the cover 16.
  • a pressure relief valve 46 is arranged in this inner tube and has a spherical valve body 47 which is pressed by the force of a spring 48 onto a valve seat 49 formed in the inner tube.
  • the valve body opens in the direction from the electric motor 12 to the inner and outer hose 28, 29.
  • the latter two parts can be designed slightly differently than in the exemplary embodiment according to FIG. 1, but this is not essential to the invention.
  • the pinion of the upper internal gear pump is again driven as in the previous exemplary embodiment, the pinion of the pre-feed pump via an intermediate driver element 51, which has two oppositely running extensions 51A and 51B, which extend from the pinion of one to the pinion of the other stage that the rotational movement of the upper to the lower pinion is transmitted.
  • FIG. 4 shows a top view of the internal gear pump 13 (feed pump), but covered by the base plate 20.
  • FIG. 5 shows a view of the internal gear pump 14 (main feed pump) covered by the cover 22.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)

Abstract

L'unité d'alimentation en carburant depuis un réservoir jusqu'au moteur à combustion interne présente deux pompes à engrenage intérieur (13, 14) montées en série, dont l'une est la pompe de préalimentation (13) pour la pompe d'alimentation principale (14). Le débit de la pompe de préalimentation est un peu plus grand que celui de la pompe d'alimentation principale. Par l'intermédiaire d'un diaphragme d'étranglement (44) ou d'une soupape dans le retour vers le réservoir est engendrée, au moyen de la quantité excédentaire, une pression d'admission assurant une amenée de carburant exempte de bulles de gaz vers l'étage d'alimentation principal, et par conséquent un débit presque constant de l'étage d'alimentation principal.
EP19910906161 1990-04-12 1991-03-22 Unite d'alimentation en carburant Withdrawn EP0524960A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4011846 1990-04-12
DE19904011846 DE4011846A1 (de) 1990-04-12 1990-04-12 Aggregat zum foerdern von kraftstoff

Publications (1)

Publication Number Publication Date
EP0524960A1 true EP0524960A1 (fr) 1993-02-03

Family

ID=6404278

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910906161 Withdrawn EP0524960A1 (fr) 1990-04-12 1991-03-22 Unite d'alimentation en carburant

Country Status (4)

Country Link
EP (1) EP0524960A1 (fr)
JP (1) JPH05506074A (fr)
DE (1) DE4011846A1 (fr)
WO (1) WO1991016537A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5466131A (en) * 1994-03-22 1995-11-14 Micropump Corporation Multiple-chamber gear pump with hydraulically connected chambers
DE19811400A1 (de) * 1998-03-16 1999-09-23 Smr De Haan Gmbh Vorrichtung zum Beschichten von Blechen oder Bändern
US6241486B1 (en) * 1998-03-18 2001-06-05 Flowserve Management Company Compact sealless screw pump
KR102150608B1 (ko) * 2014-02-25 2020-09-01 엘지이노텍 주식회사 전동 펌프

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH272985A (de) * 1949-01-15 1951-01-15 Vadolt Trust Verfahren und Einrichtung zum Fördern des Treibstoffes vom Tank zum Motor in Flugzeugen, die für Flüge in grosser Höhe bestimmt sind.
US3162129A (en) * 1962-07-13 1964-12-22 Sundstrand Corp Two-stage fuel unit
DE2631773C3 (de) * 1976-07-15 1981-10-15 SWF-Spezialfabrik für Autozubehör Gustav Rau GmbH, 7120 Bietigheim-Bissingen Brennstofförderaggregat

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9116537A1 *

Also Published As

Publication number Publication date
WO1991016537A1 (fr) 1991-10-31
DE4011846A1 (de) 1991-10-17
JPH05506074A (ja) 1993-09-02

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Legal Events

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19920924

AK Designated contracting states

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Designated state(s): DE FR GB

STAA Information on the status of an ep patent application or granted ep patent

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18D Application deemed to be withdrawn

Effective date: 19930930