EP0147330B1 - Membranpumpe für die Brennstoffzufuhr eines Kraftfahrzeugmotors. - Google Patents

Membranpumpe für die Brennstoffzufuhr eines Kraftfahrzeugmotors. Download PDF

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Publication number
EP0147330B1
EP0147330B1 EP84402717A EP84402717A EP0147330B1 EP 0147330 B1 EP0147330 B1 EP 0147330B1 EP 84402717 A EP84402717 A EP 84402717A EP 84402717 A EP84402717 A EP 84402717A EP 0147330 B1 EP0147330 B1 EP 0147330B1
Authority
EP
European Patent Office
Prior art keywords
cylindrical
valve
delivery
holder
induction
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
Application number
EP84402717A
Other languages
English (en)
French (fr)
Other versions
EP0147330A1 (de
Inventor
Jean Marye
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.)
Rivapompe SA
Original Assignee
Rivapompe SA
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 Rivapompe SA filed Critical Rivapompe SA
Publication of EP0147330A1 publication Critical patent/EP0147330A1/de
Application granted granted Critical
Publication of EP0147330B1 publication Critical patent/EP0147330B1/de
Expired 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
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
    • 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
    • F02M37/046—Arrangements for driving diaphragm-type pumps

Definitions

  • the present invention relates to a diaphragm type pump, used in particular to supply petrol to the carburetor of a motor car engine.
  • a diaphragm pump of the type described in the classifying part of claim 1 is known.
  • a seal ensures the seal between the suction chamber and discharge chamber.
  • This seal is confined for this purpose in a narrow annular channel defined on the one hand, in the radial direction, between the walls opposite the projecting portion of the valve holder and the first body, and on the other hand, in the direction axial, between shoulders formed on the valve holder and on the first body.
  • the object of the present invention is to remedy these drawbacks by proposing a pump which can be produced in large series with large tolerances and therefore at a relatively low cost price, and which can be assembled automatically.
  • the pump according to the invention conforms to the characterizing part of claim 1.
  • the seal at the joint is not dependent on variations in the dimensions of the valve holder and of the first body, since the projecting part of the valve holder can always be more or less pressed inside the chamber d 'suction, and that the seal has all the space necessary to discharge axially.
  • the pump according to the invention is much more economical than that according to the cited prior art, since on the one hand, the first body is made in one piece for molding a thermoplastic material instead of being made of metal , and on the other hand, because any unnecessary loss of thermoplastic material due to excess thicknesses is avoided, in particular in the zone of tangency between the internal partition and the cylindrical wall of the first body, and finally because it can be manufactured in very large series. It is indeed possible to manufacture a single model of first body for all types of engines, the pipes being then welded to the inlet and outlet ports with the desired orientation, imposed by the particular type of engine.
  • the collar used according to patents US-A-3491 700 and FR-A-2 417 023 for assembling the first and second bodies is initially formed by a cylindrical ring of the same diameter as that of said bodies at their crimping rim, and the two edges of which are then folded inwards so that they pinch said crimping edges.
  • the tightening thus carried out can loosen, in particular in the case where the membrane decreases in thickness as a result of drying out or loss of elasticity due to fatigue. Fuel leaks can then occur at the joint between the two bodies.
  • the initially inclined branch of the flange would still continue to exert an elastic clamping action on said edges, and would make up for any play which would tend to form between the two bodies.
  • the fuel pump 10 essentially comprises an upper body 12 and a lower body 14, both made of a thermoplastic material of good mechanical resistance and having good resistance to the relatively high temperatures which prevail under the hood of the car.
  • the bodies 12 and 14 are constituted by substantially cylindrical containers, open at one end and the respective free edges of which are applied to one another, crushing between them the peripheral edge of a deformable membrane 16, for example made of rubber , and the peripheral edge of a rigid valve holder 18. To this end, the two bodies are secured by means of an annular flange 20 of elastic sheet, which is crimped on annular flanges 22, 24, formed respectively on said edges of the bodies.
  • the flange initially has a section with three branches, the upper branch 26 which is intended to be applied against the horizontal shoulder 28 of the flange 22 of the upper body, is inclined internally from the horizontal by a small angle a.
  • this branch deforms elastically to apply to the shoulder 28 by exerting on the flanges 22, 24 and therefore on the edges of the membrane 16 and of the valve holder 18 an elastic tightening which guarantees a perfect seal between the two bodies.
  • the upper body 12 is divided internally by a substantially cylindrical partition 30 tangentially connecting to the wall of the body 12, in a suction chamber 32 inside said partition and in a discharge chamber 34 outside said partition.
  • the discharge chamber internally has partial partitions, which, drawn in an appropriate manner, make it possible to isolate volumes which act as a damper promoting the flow rates.
  • the valve holder 18 includes a portion which fits into the opening of the suction chamber 32, an O-ring 36 ensuring sealing. Said valve holder portion as well as the remaining portion which is opposite the delivery chamber are respectively provided with orifices, closed in a manner known per se, by valves 38, 40 loaded by springs 41. Upstream of the suction valve 38 is mounted a screen 43 for filtering the gasoline arriving from the tank.
  • the upper body 12 has, on its bottom wall, two orifices 42 and 44, which open respectively into the suction chamber 32 and into the discharge chamber 34.
  • an adjustable suction pipe 46 connected to the vehicle's fuel tank and an adjustable delivery pipe 48 connected to the carburetor.
  • these pipes are welded at the time of assembly, with the orientation desired by the user.
  • the upper body also has in its cylindrical wall an orifice 50 which opens into the delivery chamber and on which is fixed a tube 52 intended to bring the fuel back to the tank in the event of the car.
  • the central portion of the membrane 16 is sandwiched between a support flange 54 and a counter plate 56 to which it is secured by means of a rivet 58.
  • the flange carries an L-shaped arm 60 connected by a free-running link to the 'upper end of a pusher 62 which extends along the axis of the lower body 14.
  • the pusher projects outside the lower body through an orifice formed in the bottom of the latter, a seal 64 ensuring the sealing at this orifice.
  • the membrane-flange and counter-plate assembly is normally biased upwards in FIG. 1 by a compression spring 66 resting on the flange 54 and on the bottom of the lower body.
  • the pusher 62 can be pressed inside the lower body, against the force of a spring 68 of greater hardness than that of the spring 66.
  • the pusher can be actuated either by the eccentric of a motor shaft , or by a tilting lever.
  • the pump is in the state shown in FIG. 1: the pusher 62 is brought into its low position by the return spring 68; the stop 70 of the pusher resting on the arm 60 lowers the assembly of the membrane 16, of the support flange 54 and of the counterplate 56.
  • the cam pushes the pusher, said movable assembly being released, it is pushed upwards in FIG. 1 by the prestressed spring 66.
  • the gasoline which is in the chamber 72 defined between the membrane 16 and the valve holder 18 is discharged through the valve 40 and the manifold. discharge 48 to the carburetor. r.
  • the pump according to the invention is much more efficient, lighter, more economical than the best diaphragm pumps currently known on the market.
  • it can be manufactured fully automatically in large series, since only one model has to be manufactured, the pipes being welded at the time of assembly, with the desired orientation.
  • the pump shown in FIG. 5 differs from that of FIG. 1 only in that the pusher 62 is directly fixed to the membrane 16, flange 54 and counter plate 56 assembly and that the pusher is actuated by a lever. tilting 76.
  • the latter is pivotally mounted about an axis 78 and is urged to bear against a cam 80 of a drive shaft by a spring 82.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Reciprocating Pumps (AREA)

Claims (4)

1. Membranpumpe für die Brennstoffzufuhr eines Kraftfahrzeugmotors vom
einen am einen Ende mit einem Boden, der mit einer Ansaugöffnung (42) und einer Ausstoßöffnung (44) versehen ist, verschlossenen zylindrischen ersten Körper (12), der im Innern durch eine zylindrische Wand (30) geteilt ist, die mit dem Boden verbunden ist und die innen eine Ansaugkammer (32) und außen eine Ausstoßkammer (34) begrenzt, in welche jeweils die Ansaug- bzw. die Ausstoßöffnung mündet,
einen schalenförmigen zweiten Körper (14), wobei die beiden Körper (12,14) an ihrem offenen Ende jeweils mit einem zum Hintergreifen bestimmten Rand (22, 24) versehen sind,
eine kreisförmige verformbare Membrane (16),
einen mit einer Ansaugklappe (38) und einer Ausstoßklappe (40) versehenen kreisförmigen Klappenträger (18), der einen rohrförmigen hervorstehenden Abschnitt aufweist, und
einen elastischen Kragen (20), der die zum Hintergreifen bestimmten Ränder (22, 24) auf den Umfangsrändern der Membrane und des Klappenträgers festklemmt, wobei sich der rohrförmige hervorstehende Abschnitt des Klappenträgers dichtend an das Innere der zylindrischen Wand anpaßt, aufweisenden Typ, dadurch gekennzeichnet, daß die zylindrische Wand (30) einen ersten zylindrischen Abschnitt aufweist, der an den Boden des ersten Körpers angrenzt und dessen Wandung in die zylindrische Wandung des ersten Körpers übergeht, ohne am Punkt ihrer gemeinsamen Tangente eine Überdicke gegenüber der Wandung des ersten Körpers zu bilden, und daß der zylindrische Abschnitt sich in einem koaxialen zweiten zylindrischen Abschnitt mit einem inneren Durchmesser, der größer ist als jener des ersten zylindrischen Abschnitts, fortsetzt ; daß sich der rohrförmige hervorstehende Abschnitt des Klappenträgers in den zweiten zylindrischen Abschnitt der Wand hinein erstreckt und mit der inneren Wandung desselben einen ringförmigen Abstand bildet, in den ein Dichtring (36) eingefügt ist, derso bemessen ist, daßer nur einen Bruchteil der Höhe des zweiten zylindrischen Abschnitts der Wand und des rohrförmigen Abschnitts des Klappenträgers belegt ; daß der erste Körper durch Gießen eines thermoplastischen Materials in einem Stück gebildet ist ; und daß die Ansaugöffnung (42) und die Ausstoßöffnung (44) mit auf diese Öffnungen geschweißten Rohrstücken (46, 48) versehen sind.
2. Membranpumpe gemäß Anspruch 1, dadurch gekennzeichnet, daß der ringförmige Kragen (20) im Querschnitt drei Schenkel aufweist, von denen die beiden äußeren dazu bestimmt sind, sich jeweils an die zum Hintergreifen bestimmten Ränder (22, 24) anzulegen, wobei der eine (26) der äußeren Schenkel vor dem Fassen um einen kleinen Winkel α über die Position, die er normalerweise einnimmt, wenn er auf dem entsprechenden Rand (22) aufliegt, hinaus geneigt ist, so daß er nach dem Fassen mit dem anderen äußeren Schenkel eine elastische Pressung auf die Ränder ausübt.
3. Membranpumpe gemäß Anspruch 1, dadurch gekennzeichnet, daß der erste Körper auf seiner seitlichen zylindrischen Wandung eine dritte Öffnung (50) aufweist, die in die Ausstoßkammer (34) mündet und auf der ein zum Rückführen des Kraftstoffs zum Tank bestimmtes Rohrstück (52) befestigt ist.
4. Membranpumpe gemäß Anspruch 1, dadurch gekennzeichnet, daß die Ausstoßkammer (34) Teilwände aufweist, die ermöglichen, Volumina abzuteilen, die die Rolle von die Durchsätze verbessernden Puffern spielen.
EP84402717A 1983-12-28 1984-12-26 Membranpumpe für die Brennstoffzufuhr eines Kraftfahrzeugmotors. Expired EP0147330B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8320928 1983-12-28
FR8320928A FR2557639B1 (fr) 1983-12-28 1983-12-28 Pompe a membrane pour l'alimentation en essence d'un moteur de vehicule automobile et son procede d'assemblage

Publications (2)

Publication Number Publication Date
EP0147330A1 EP0147330A1 (de) 1985-07-03
EP0147330B1 true EP0147330B1 (de) 1988-08-17

Family

ID=9295652

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84402717A Expired EP0147330B1 (de) 1983-12-28 1984-12-26 Membranpumpe für die Brennstoffzufuhr eines Kraftfahrzeugmotors.

Country Status (5)

Country Link
EP (1) EP0147330B1 (de)
DE (1) DE3473493D1 (de)
ES (1) ES8605614A1 (de)
FR (1) FR2557639B1 (de)
PT (1) PT79753A (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2608218B1 (fr) * 1986-12-16 1989-04-07 Hunsinger Emile Pompe a membrane pour l'alimentation en essence d'un moteur de vehicule automobile et son procede de fabrication
ES2018567B3 (es) * 1986-12-16 1991-04-16 Emile Hunsinger Bomba con membrana para la alimentacion en carburante de un motor termico y su proceso de fabricacion
FR2623253B1 (fr) * 1987-11-13 1990-04-13 Hunsinger Emile Pompe d'alimentation en carburant d'un moteur thermique et son procede de fabrication
FR2722539B1 (fr) 1994-07-12 1996-08-23 Rivapompe Sa Pompe mecanique a membrane a pression augmentee pour l'alimentation en carburant de moteurs thermiquues, et en particulier de moteur a injection
WO1997030283A1 (en) * 1996-02-14 1997-08-21 Mikuni Adec Corporation Diaphragm-holding synthetic resin assembly
KR101605718B1 (ko) * 2014-07-31 2016-03-24 세메스 주식회사 액 공급 유닛 및 이를 가지는 기판 처리 장치

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1121507A (fr) * 1952-10-29 1956-08-20 Carter Carburetor Corp Pompe à carburant
US3252424A (en) * 1960-01-15 1966-05-24 Acf Ind Inc Fuel systems
US3198128A (en) * 1961-07-05 1965-08-03 Acf Ind Inc Mechanical pump
US3179055A (en) * 1962-08-31 1965-04-20 Acf Ind Inc Fuel pump
US3491700A (en) * 1967-03-21 1970-01-27 Airtex Prod Fuel pump
DE2159306B2 (de) * 1970-12-17 1978-09-21 Iao Industrie Riunite S.P.A., Turin (Italien) Kraftstoffmembranpumpe für endotherme Maschinen
GB1476898A (en) * 1975-05-05 1977-06-16 Gen Motors France Diaphragm pumps
JPS53106908A (en) * 1977-02-28 1978-09-18 Kyosan Denki Kk Mechanical fuel pump for internal combustion engine
DE2901981A1 (de) * 1978-02-09 1979-08-16 Iao Industrie Riunite Spa Membranpumpe zur treibstoff-foerderung, insbesondere fuer brennkraftmaschinen
FR2425555A1 (fr) * 1978-05-08 1979-12-07 Pn Sas Negro Et Co Pompes pour l'alimentation en combustible pour moteurs a combustion interne
BR8004133A (pt) * 1979-10-01 1981-04-22 Acf Ind Inc Bomba de combustivel
FR2512888A1 (fr) * 1981-06-09 1983-03-18 Siette Spa Ensemble de pompage pour deux fluides differents, notamment de l'air et du carburant liquide, pour vehicules automobiles
IT8222121U1 (it) * 1982-06-08 1983-12-08 Siette Spa Pompa a membrana, particolarmente per l'alimentazione del combustibile ad un motore a combustione interna

Also Published As

Publication number Publication date
FR2557639B1 (fr) 1988-06-24
PT79753A (fr) 1985-01-01
FR2557639A1 (fr) 1985-07-05
ES539094A0 (es) 1986-03-16
DE3473493D1 (en) 1988-09-22
ES8605614A1 (es) 1986-03-16
EP0147330A1 (de) 1985-07-03

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