EP0036428B1 - Fuel pump - Google Patents

Fuel pump Download PDF

Info

Publication number
EP0036428B1
EP0036428B1 EP80902085A EP80902085A EP0036428B1 EP 0036428 B1 EP0036428 B1 EP 0036428B1 EP 80902085 A EP80902085 A EP 80902085A EP 80902085 A EP80902085 A EP 80902085A EP 0036428 B1 EP0036428 B1 EP 0036428B1
Authority
EP
European Patent Office
Prior art keywords
diaphragm
fuel
fuel pump
lip
pump
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
EP80902085A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0036428A1 (en
EP0036428A4 (en
Inventor
Walter E. Basch
John W. Haney
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.)
ACF Industries Inc
Original Assignee
ACF Industries Inc
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 ACF Industries Inc filed Critical ACF Industries Inc
Publication of EP0036428A1 publication Critical patent/EP0036428A1/en
Publication of EP0036428A4 publication Critical patent/EP0036428A4/en
Application granted granted Critical
Publication of EP0036428B1 publication Critical patent/EP0036428B1/en
Expired 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
    • F02M37/046—Arrangements for driving diaphragm-type pumps
    • 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

Definitions

  • the invention relates to a fuel pump for use in an automotive fuel system, comprising a body having a first portion in which is formed a fuel intake cavity and a fuel discharge cavity, and a second portion in which is formed a fuel pumping chamber, one end of each cavity being in fluid communication with the pumping chamber, a flexible diaphragm closing the pumping chamber, the diaphragm being insertable into the open end of the second portion of the body, means for flexing the diaphragm to pump fuel into and out of the pumping chamber through the respective intake and discharge cavities, a housing in which the flexing means is housed, the housing having one end formed for abutment with the open end portion of the body, and clamping means for connecting the body and the housing to one another.
  • Fuel pumps of the afore-mentioned type are known from US-A-2 786 423 and GB-A-1 413 536, with the outer margin of the diaphragm lying between a flange of the body and a flange of the housing, said flanges being connected to one another by clamping means whereby the outer margin of said diaphragm is held tightly between said flanges.
  • FR-A-1 306 702 Another construction is known from FR-A-1 306 702, wherein the outer margin of the diaphragm is enclosed by a lip formed at the open end of the housing which includes part of the means for flexing the diaphragm.
  • the pump body including the fuel pumping chamber is clamped to the housing by means of a lip which is bent over the rim of the housing.
  • FMVSS 30 Federal Motor Vehicle Safety Standard 30 was issued in an attempt to reduce the hazards attendant the location of the fuel pump in the engine compartment by requiring that the risk of damage to a fuel pump during a crash be minimized.
  • various schemes have been proposed to shield the fuel pump or otherwise protect it from flying debris.
  • these protective shields add weight to the vehicle, may be difficult to fit into already crowded engine compartments, and may not always prevent an object from striking a fuel pump.
  • the invention as claimed is intended to remedy these drawbacks. It solves the problem of how to design a fuel pump for use in an automotive fuel system in which the fuel pump will not leak fuel when struck by an object even though the fuel pump is deformed, by the measures that a lip is formed at the open end of the second portion of the body, the lip being bendable over the outer margin of the diaphragm after it is inserted into the body to form a fluid seal between the body and the diaphragm, the seal being capable of withstanding abnormal forces such as occur during a crash whereby the seal retains its integrity and no fluid leak occurs.
  • the fuel pump of the invention has substantially the same envelope as a conventional fuel pump so as to be readily installed in the engine compartment of a vehicle and take up substantially the same volume therein.
  • a fuel pump F for use in an automotive fuel system comprises a pump body, generally indicated B, which is of one-piece, thin-walled, sheet metal construction.
  • Body B has a first portion P 1 in which are formed two integral deep-drawn cylindrical cup- shaped projections, one of which is partially shown in Figure 1 and is indicated by reference numeral 1.
  • One of the projections defines an intake cavity for the fuel pump and the other projection defines a discharge cavity for the pump.
  • a properly oriented check valve (not shown) is located in each cavity to control fuel flow into and out of the fuel pump and appropriate fittings (also not shown) are located at the outer end of each projection for connecting the fuel pump into the fuel system.
  • Check valves and fittings of the type shown in US-A-3 096 722 are illustrative of those which may be used in fuel pump F.
  • Body B has a second portion P2 of a shallow cup shape having an end wall 3 and a flaring annular peripheral wall 5 forming a fuel pumping chamber 7. One end of each cavity 1 is in fluid communication with the pumping chamber. The lower end of body portion P2 is open.
  • the diaphragm closes pumping chamber 7.
  • the diaphragm consists of a relatively thin disk of flexible, fuel resistant material such as a suitable synthetic rubber. In its unstressed condition the diaphragm is essentially flat. The diaphragm is insertable into the open end of the second portion of body B.
  • Means, indicated generally 13, flex diaphragm 11 to pump fuel into and out of pumping chamber 7 through the respective intake and discharge cavities.
  • Means 13 comprises a diaphragm actuating rod 15 and a spring 17.
  • Diaphragm 11 is sandwiched between a pair of backing plates 19 and 21 respectively.
  • Rod 15 extends through the backing plates and the diaphragm and the end of the rod is spun over.
  • One end of spring 17 seats against the underside of plate 21.
  • a rocker arm 23 is operable by an engine driven eccentric cam (not shown). The inner end of the rocker arm is attached to the other end of rod 15 and pulls the rod downward as it is rocked by the cam. This pulls diaphragm 11 downwardly and creates the intake stroke of the pump.
  • Spring 17 pushes the diaphragm upwardly at the end of the intake stroke to produce the discharge stroke of the pump.
  • Means 13 is housed in a housing 25.
  • the housing has a hollow conical pump head 26.
  • the pump head is an outwardly extending circumferential rim 27 the upper face of which is downwardly and outwardly sloped.
  • Body B and housing 25 are assembled as is well known in the art with the outer margin of diaphragm 11 clamped between the abutting surfaces of the body and the housing.
  • An improvement of the present invention comprises a lip 29 formed around the open end of body portion P2.
  • lip 29, which extends around the periphery of the open end of body portion P2 is bendable over the outer margin of diaphragm 11 after the diaphragm is inserted into the open end of the body. This creates a fluid seal between the body and the diaphragm.
  • a circular ring 31 is now fitted around the body and the housing to clamp the two together. Ring 31 has an inturned lower margin forming a lip 35. The inner face of this lip abuts the bottom outer surface of rim 27 when the pump is assembled.
  • the ring has an upwardly extending circumferential side 37 whose height is such that the side extends beyond the joining surfaces of body B and housing 35. The upper portion of side 37 is crimped over the top of body B after the body and housing are brought into mating abutment so as to clamp the body and housing together as shown in Figure 2.
  • a fuel pump F is made crash- worthy in that a fluid seal is created which can withstand severe distortions of the pump. It has been experimentally found that the seal created between the body and diaphragm remains intact even when the body is essentially flattened such as might occur if the pump were struck by flying degris. Thus, the danger of fuel leakage following a crash is substantially reduced as is the necessity of brackets of shields for the fuel pump. At the same time, the fuel pump envelope is essentially unchanged and a fuel pump of the present invention will occupy substantially the same space in an engine compartment as a conventional non- crashworthy fuel pump.
  • backing plate 21 has a circumferential skirt 39.
  • the length of lip 29 and the height of skirt 39 are made sufficiently great so the outer end of the skirt cannot contact diaphragm 11 if the body of the fuel pump is so deformed that the skirt and body/diaphragm assembly come into contact. This prevents the diaphragm from being punctured by the skirt and thus further safeguards against fuel leaks.
  • a clamping ring 31' which may be used to join body B and housing 25 to form a fuel pump assembly. Ring 31' has its upper end bent back upon itself prior to or during the crimping operation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Reciprocating Pumps (AREA)
EP80902085A 1979-10-01 1980-09-19 Fuel pump Expired EP0036428B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US8026679A 1979-10-01 1979-10-01
US80266 1979-10-01

Publications (3)

Publication Number Publication Date
EP0036428A1 EP0036428A1 (en) 1981-09-30
EP0036428A4 EP0036428A4 (en) 1982-01-08
EP0036428B1 true EP0036428B1 (en) 1983-09-21

Family

ID=22156278

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80902085A Expired EP0036428B1 (en) 1979-10-01 1980-09-19 Fuel pump

Country Status (8)

Country Link
EP (1) EP0036428B1 (pt)
BR (1) BR8004133A (pt)
CA (1) CA1144003A (pt)
DE (1) DE3064950D1 (pt)
ES (1) ES8105823A1 (pt)
IT (1) IT1132848B (pt)
MX (1) MX151372A (pt)
WO (1) WO1981000891A1 (pt)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008062350C5 (de) * 2008-12-15 2016-03-31 Carbo Tex Gmbh Verfahren und Vorrichtung zum Rückgewinnen von Kohlenstofffasern und/oder Aktivkohlepartikeln

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4282801A (en) * 1979-10-01 1981-08-11 Acf Industries, Inc. Crashworthy fuel pump
FR2557639B1 (fr) * 1983-12-28 1988-06-24 Rivapompe Sa Pompe a membrane pour l'alimentation en essence d'un moteur de vehicule automobile et son procede d'assemblage
JP6941366B2 (ja) * 2017-12-28 2021-09-29 株式会社Ibs ダイアフラムポンプ

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2786423A (en) * 1952-10-29 1957-03-26 Acf Ind Inc Fuel pump assembly
GB1413536A (en) * 1971-11-18 1975-11-12 Acf Ind Inc Diaphragm tyre fuel pump

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1108146A (en) * 1913-11-22 1914-08-25 Edward J Deegan Regulator.
US1945181A (en) * 1928-02-23 1934-01-30 William C Carter Diaphragm pump
US2834299A (en) * 1952-10-29 1958-05-13 Acf Ind Inc Sealing means for diaphragm casings
FR1306702A (fr) * 1961-09-04 1962-10-19 Pompe à membrane
GB1080293A (en) * 1964-11-21 1967-08-23 Gen Motors France Diaphragm pumps
GB1065225A (en) * 1965-03-25 1967-04-12 Gen Motors France Diaphragm pumps
US3335641A (en) * 1966-01-19 1967-08-15 Gen Motors Corp Fuel pump with crimped cover seal
FR2052094A5 (pt) * 1969-07-15 1971-04-09 Guiot & Cie Ets
US3776107A (en) * 1972-07-03 1973-12-04 Monogram Ind Inc Diaphragm pump for a recirculating toilet
US3912423A (en) * 1974-01-07 1975-10-14 Acf Ind Inc Diaphragm fuel pump with field serviceable gas filter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2786423A (en) * 1952-10-29 1957-03-26 Acf Ind Inc Fuel pump assembly
GB1413536A (en) * 1971-11-18 1975-11-12 Acf Ind Inc Diaphragm tyre fuel pump

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008062350C5 (de) * 2008-12-15 2016-03-31 Carbo Tex Gmbh Verfahren und Vorrichtung zum Rückgewinnen von Kohlenstofffasern und/oder Aktivkohlepartikeln

Also Published As

Publication number Publication date
ES495477A0 (es) 1981-06-01
EP0036428A1 (en) 1981-09-30
CA1144003A (en) 1983-04-05
ES8105823A1 (es) 1981-06-01
MX151372A (es) 1984-11-13
DE3064950D1 (en) 1983-10-27
IT8024673A0 (it) 1980-09-15
EP0036428A4 (en) 1982-01-08
IT1132848B (it) 1986-07-09
BR8004133A (pt) 1981-04-22
WO1981000891A1 (en) 1981-04-02

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