EP0536159B1 - Organe pour l'alimentation du moteur a combustion interne d'un vehicule a moteur avec du carburant provenant d'un reservoir - Google Patents

Organe pour l'alimentation du moteur a combustion interne d'un vehicule a moteur avec du carburant provenant d'un reservoir Download PDF

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Publication number
EP0536159B1
EP0536159B1 EP91909637A EP91909637A EP0536159B1 EP 0536159 B1 EP0536159 B1 EP 0536159B1 EP 91909637 A EP91909637 A EP 91909637A EP 91909637 A EP91909637 A EP 91909637A EP 0536159 B1 EP0536159 B1 EP 0536159B1
Authority
EP
European Patent Office
Prior art keywords
delivery
passage
pump
chamber
pump chamber
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
EP91909637A
Other languages
German (de)
English (en)
Other versions
EP0536159A1 (fr
Inventor
Ulrich Kemmner
Kurt Frank
Michael Niederkofler
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 EP0536159A1 publication Critical patent/EP0536159A1/fr
Application granted granted Critical
Publication of EP0536159B1 publication Critical patent/EP0536159B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D5/00—Pumps with circumferential or transverse flow
    • F04D5/002—Regenerative pumps
    • F04D5/003—Regenerative pumps of multistage type
    • F04D5/005—Regenerative pumps of multistage type the stages being radially offset
    • 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
    • F02M37/048—Arrangements for driving regenerative pumps, i.e. side-channel 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
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D5/00—Pumps with circumferential or transverse flow
    • F04D5/002—Regenerative pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D9/00—Priming; Preventing vapour lock
    • F04D9/001—Preventing vapour lock
    • F04D9/002—Preventing vapour lock by means in the very pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D9/00—Priming; Preventing vapour lock
    • F04D9/02—Self-priming pumps
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S417/00—Pumps
    • Y10S417/01—Materials digest

Definitions

  • the invention relates to a fuel pump, the delivery unit being connected to the interior of the tank via a vent hole.
  • a delivery unit is already known (DE-A-35 09 374), in which this bore is arranged directly in the delivery channel and is provided with an elastic valve flap, which remains in its open position during gas delivery, but against the "tougher" medium when delivering fuel the spring force is deformed and the channel-side mouth of the bore closes.
  • Such a structure requires a particularly complex assembly of the valve flap. There is also the risk that when gas is being pumped, the open valve flap will graze the impeller of the feed pump, causing undesirable noises and ultimately being destroyed.
  • a conveyor assembly is also known from GB-A-2 134 598, wherein there are no movable components which are subject to wear during operation. The assembly of such parts is also eliminated.
  • the invention is based on an aggregate of this type. The characterizing features of claim 1 ensure more effective ventilation.
  • FIG. 1 shows a schematic representation of an arrangement with a fuel delivery tank, a fuel delivery unit and an internal combustion engine of a motor vehicle
  • FIG. 2 shows a partial longitudinal section through the delivery unit according to FIG. 1 in an enlarged view, along the line II-II in FIG. 3 and FIG Section through a pump chamber cover belonging to the delivery unit according to FIG. 2, along the line III-III.
  • FIG. 1 shows a fuel storage tank 10 in which a fuel delivery unit 12 is arranged.
  • a pressure line 16 which leads to an internal combustion engine 18, is connected to a pressure connection 14 of the fuel delivery unit 12.
  • the fuel delivery unit 12 sucks fuel from the storage tank 10 via a suction nozzle 13 and delivers it the fuel to the internal combustion engine 18.
  • the fuel delivery unit 12 is equipped with an electric drive motor 20 (FIG. 2), the motor armature 22 of which is seated on an armature shaft 24.
  • the armature shaft 24 penetrates at one end 26 a partition wall 28 which separates a space 30 in which the electric motor 20 is located from a feed pump 32.
  • the feed pump 32 is designed as a flow pump.
  • Your impeller 34 is rotatably connected to the end 26 of the armature shaft 24.
  • the impeller 34 is arranged in a pump chamber 36 which is delimited on the one hand by the partition wall 28 to the drive motor 20 and on the other hand by a cover 38 in which the suction nozzle 13 is located.
  • the feed pump is designed as a two-stage flow pump. However, this is meaningless with regard to the invention, because the invention can also be applied to a single-stage flow pump without difficulty.
  • the impeller 34 which has an inner, first ring 40 of vanes, rotates in the pump chamber 36. In its peripheral area, the impeller 34 has a second ring 42 of vanes.
  • the second ring 42 consists of two partial rings, each of which is formed on one of the two end faces 44, 46 of the substantially circular-cylindrical impeller 34.
  • the two partial wing rings of the second wing ring 42 have been provided with the reference numbers 51 and 53 in FIG.
  • the partition wall 28 is fixedly connected to a housing part 54 which surrounds the conveyor assembly 12.
  • the pump chamber 36 is closed by the cover 38. This is held in its receptacle by an inwardly shaped edge 56 of the housing part 54.
  • a first, inner conveying channel 50 extends counterclockwise from a suction opening 58 in the suction nozzle 13 to an intermediate channel 60 which extends essentially radially.
  • a second or outer delivery channel 52 connects to the intermediate channel 60. This extends along an edge shoulder 62 of the cover 38 to close to the intermediate channel 60
  • Corresponding delivery channels 50, 52 are arranged in the partition wall 28. Seen in the radial direction, the two delivery channels 50 and 52 are spaced from one another, so that a separating surface 64 remains between them. As seen in the axial direction, the two delivery channels 50 and the two delivery channels 52 lie opposite one another, the separating surfaces 64 of the dividing wall 28 and of the cover 38 also lie opposite one another. In the area of the outlet 66 of the delivery channel 52 in the cover 38, there is a pressure opening 68 in the partition 28 opposite it, which connects the delivery channel 52 to the space 30, which, as shown in FIG. 1, has the pressure port 14.
  • FIG. 3 also shows that three bores 70 are arranged in the separating surface 64 of the cover 38, which lead from the pump chamber 36 to the suction side of the pump 32. These bores 70 thus connect the pump chamber to an area of the system in which there is low pressure. In the exemplary embodiment, this area is the tank interior.
  • These three degassing bores 70 are arranged one behind the other in the running direction (arrow 72) of the impeller 34 in a groove-like groove 74 which extends essentially between the two delivery channels 50 and 52 in the direction of rotation arrow 72.
  • the two delivery channels 50 and 52 thus extend from the suction opening 58 to the pressure opening 68, the cover 38 having the suction opening 58 and the partition 28 having the pressure opening 68.
  • the hydraulic connection between the similar conveying channels opposite each other in the axial direction occurs once through the openings between the wings of the first ring 40 or through an annular gap 76 remaining between the edge shoulder 62 and the outer circumferential surface of the impeller 34.
  • the course of the groove-like groove 74 can also be made clear by the fact that part of the groove 74 extends in the circumferential direction (arrow 72) and another part of the groove 74 extends against this direction of rotation of the impeller 34.
  • the two the pump chamber 36 in the axial direction of the impeller 34 bounding walls 28 and 38 are made of plastic in the embodiment.
  • the groove-like groove 74 is formed in the cover 38.
  • the conveyor unit according to the invention works as follows:
  • the feed pump 32 sucks fuel from the storage tank 10 via the suction opening 58 and presses it in the direction of arrow 72 through the first delivery channel 50 and the intermediate channel 60 into the outer delivery channel 52, from where from which fuel enters the space 30 of the drive motor 20 via the pressure opening 68 and leaves it via the pressure port 14.
  • gas bubbles mentioned occur, for example, through cavitation, which takes place in certain areas of the feed pump. Such gas bubbles can also be present in that the pump has been completely emptied and the feed pump now initially conveys this air. In all cases, it should be avoided that the gas bubbles remain in the system, reach the internal combustion engine 18 via the pressure line 16 and interfere with their operation.

Abstract

On propose un organe servant à alimenter le moteur à combustion interne (18) d'un véhicule à moteur avec du carburant provenant d'un réservoir (10). L'organe d'alimentation (12) comprend une pompe d'alimentation disposée à l'intérieur du réservoir et se présentant sous la forme d'une pompe d'écoulement, dont la roue à ailettes (34) tournante, de forme essentiellement cylindrique circulaire, est disposée dans une chambre (36) correspondante, également cylindrique circulaire, et, dans une au moins des deux parois de la chambre, un canal d'alimentation (50) approximativement circulaire, de section en forme d'encoche, s'étend d'une ouverture d'aspiration (58) aboutissant à la chambre jusqu'à une ouverture sous pression (68) partant de celle-ci et cette paroi avant de la chambre est traversée, au niveau de l'ouverture sous pression, par un orifice (70) qui relie la chambre à une zone basse pression du circuit. On obtient, d'une manière simple, une extraction particulièrement fiable des bulles de gaz à l'extérieur de la pompe et donc de la section d'alimentation, par le fait que cet orifice est situé dans une surface étanche (64) qui délimite transversalement le canal d'alimentation relativement à l'axe de rotation de la roue à ailettes.

Claims (7)

  1. Ensemble servant à refouler du carburant à partir d'un réservoir (10) vers un moteur à combustion interne (18) d'un véhicule à moteur, avec une pompe de refoulement (32) disposée dans le réservoir et constituée sous la forme d'une pompe hydraulique dont le rotor (34) de forme sensiblement cylindrique à section circulaire, entraîné en rotation, est disposé dans une chambre de pompe (36) de forme cylindrique à section circulaire correspondante et dont au moins un canal de refoulement (50, 60, 52) de forme approximativement annulaire, ayant en section transversale le type d'une rainure, s'étend au moins dans l'une des deux parois frontales de la chambre (28 ou 38) depuis un orifice d'aspiration (58) débouchant dans la chambre de pompe, jusqu'à un orifice sous pression (68) sortant du précédent, cette paroi frontale de la chambre étant traversée dans la zone de l'orifice sous pression par un perçage (70) qui relie la chambre de pompe (36) à une zone du système dans laquelle règne la basse pression, le perçage (70) se trouvant dans une face d'étanchéité (64) qui délimite le canal de refoulement (50, 60, 52) par rapport à l'axe de rotation du rotor (34) dans le sens radial, ensemble caractérisé en ce que, dans la surface d'étanchéité (64), est disposé un canal (74) ayant le type d'une gouttière qui s'étend, en partant du perçage (70), en partie dans le sens de rotation (flèche 72) et en partie en sens contraire du sens de rotation du rotor (34).
  2. Ensemble selon la revendication 1, caractérisé en ce que dans le canal ayant le type d'une gouttière (74) sont disposés d'autres perçages (70).
  3. Ensemble selon l'une des revendications 1 ou 2, dans lequel le rotor a une première couronne et une deuxième couronne d'ailettes, dont la deuxième couronne présente un rayon plus grand que la couronne d'ailettes, et dans lequel se trouvent, dans la paroi frontale de la chambre, deux canaux de refoulement correspondant à la couronne d'ailettes respective, dont le canal de refoulement intérieur est relié par un canal intermédiaire au canal extérieur de refoulement, de même que l'orifice d'aspiration est disposé sur le canal de refoulement intérieur et l'orifice sous pression est disposé sur le canal de refoulement extérieur, ensemble caractérisé en ce que le perçage (70) se trouve dans une zone de la surface d'étanchéité (64) qui s'étend au moins sensiblement entre les deux canaux de refoulement (50, 52).
  4. Ensemble selon la revendication 3, caractérisé en ce que le canal ayant le type d'une gouttière (74) s'étend dans le sens radial entre les deux canaux de refoulement (50,52) jusque dans la zone du canal intermédiaire (60).
  5. Ensemble selon l'une des revendications 1 à 4, caractérisé en ce que la paroi de la chambre est constituée sur un couvercle (38) délimitant d'un côté la chambre de pompe (36) et fabriqué en matière plastique, de préférence par injection.
  6. Ensemble selon la revendication 5, caractérisé en ce que le canal qui a le type d'une gouttière (74) est formée dans la paroi frontale du couvercle (38).
  7. Ensemble selon l'une des revendications 1 à 6, caractérisé en ce que le perçage (70) relie une zone de pression assez élevée dans la chambre de pompe (36), à la chambre entourée par le réservoir (10).
EP91909637A 1990-06-28 1991-05-27 Organe pour l'alimentation du moteur a combustion interne d'un vehicule a moteur avec du carburant provenant d'un reservoir Expired - Lifetime EP0536159B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4020520A DE4020520A1 (de) 1990-06-28 1990-06-28 Aggregat zum foerdern von kraftstoff vom vorratstank zur brennkraftmaschine eines kraftfahrzeuges
DE4020520 1990-06-28
PCT/DE1991/000449 WO1992000449A1 (fr) 1990-06-28 1991-05-27 Organe pour l'alimentation du moteur a combustion interne d'un vehicule a moteur avec du carburant provenant d'un reservoir

Publications (2)

Publication Number Publication Date
EP0536159A1 EP0536159A1 (fr) 1993-04-14
EP0536159B1 true EP0536159B1 (fr) 1994-08-31

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Family Applications (1)

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EP91909637A Expired - Lifetime EP0536159B1 (fr) 1990-06-28 1991-05-27 Organe pour l'alimentation du moteur a combustion interne d'un vehicule a moteur avec du carburant provenant d'un reservoir

Country Status (5)

Country Link
US (1) US5338151A (fr)
EP (1) EP0536159B1 (fr)
JP (1) JP3027186B2 (fr)
DE (2) DE4020520A1 (fr)
WO (1) WO1992000449A1 (fr)

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Also Published As

Publication number Publication date
EP0536159A1 (fr) 1993-04-14
US5338151A (en) 1994-08-16
DE4020520A1 (de) 1992-01-02
DE59102760D1 (de) 1994-10-06
WO1992000449A1 (fr) 1992-01-09
JP3027186B2 (ja) 2000-03-27
JPH05508459A (ja) 1993-11-25

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