EP2256331B1 - Fuel supply module - Google Patents

Fuel supply module Download PDF

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Publication number
EP2256331B1
EP2256331B1 EP09726346.1A EP09726346A EP2256331B1 EP 2256331 B1 EP2256331 B1 EP 2256331B1 EP 09726346 A EP09726346 A EP 09726346A EP 2256331 B1 EP2256331 B1 EP 2256331B1
Authority
EP
European Patent Office
Prior art keywords
fuel
tube
valve
base member
mounting base
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.)
Not-in-force
Application number
EP09726346.1A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2256331A4 (en
EP2256331A1 (en
Inventor
Mineo Torikai
Toshihiko Naito
Motohiro Mishima
Toshihiro Arai
Hiroshi Yoshida
Michiru Fukuda
Minoru Ueda
Masaki Ueno
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.)
Honda Motor Co Ltd
Keihin Corp
Original Assignee
Honda Motor Co Ltd
Keihin Corp
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 Honda Motor Co Ltd, Keihin Corp filed Critical Honda Motor Co Ltd
Publication of EP2256331A1 publication Critical patent/EP2256331A1/en
Publication of EP2256331A4 publication Critical patent/EP2256331A4/en
Application granted granted Critical
Publication of EP2256331B1 publication Critical patent/EP2256331B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F02M37/08—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
    • F02M37/103—Mounting pumps on fuel tanks
    • 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
    • F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
    • F02M37/0023—Valves in the fuel supply and return system
    • F02M37/0029—Pressure regulator in the low pressure fuel system

Definitions

  • the present invention relates to a fuel supply module that is primarily for supplying fuel to a fuel injection valve of an engine and, in particular, to an improvement of a fuel supply module that includes a mounting base member mounted on a fuel tank and having a fuel takeoff pipe projecting from an upper face, an electric pump that is supported by the mounting base member, is housed within the fuel tank, pumps up fuel within the fuel tank, and feeds the fuel to the fuel takeoff pipe, and a regulator valve having a valve tube retained in the mounting base member and returning into the fuel tank part of the fuel discharged from the electric pump so as to regulate the discharge pressure thereof.
  • Patent Publication 1 Japanese Patent Application Laid-open No. 2007-291866
  • the present inventors have found that one of the factors causing noise during operation of such a fuel supply module is vibration due to opening and closing of a valve body in the regulator valve being transmitted to the mounting base member and the mounting base member generating resonance.
  • At least the preferred embodiment of the present invention therefore has an object of providing a quiet fuel supply module by preventing as much as possible vibration due to opening and closing of a valve body in a regulator valve from being transmitted to a mounting base member.
  • a further fuel supply module is disclosed in EP 0666415 , in which a pressure regulator for the fuel system is supported and centered by two concentric walls that are separated by a gap.
  • the present invention provides a fuel supply module comprising a mounting base member mounted on a fuel tank and having a fuel takeoff pipe projecting from an upper face, an electric pump that is supported by the mounting base member, is housed within the fuel tank, pumps up fuel within the fuel tank, and feeds the to the fuel takeoff pipe, and a regulator valve having a valve tube retained in the mounting base member and returning into the fuel tank part of the fuel discharged from the electric pump so as to regulate the discharge pressure thereof, wherein formed on the mounting base member are a retaining tube and a surrounding wall surrounding the retaining tube via a gap, at least part of the valve tube of the regulator valve being press-fitted into the retaining tube, characterised in that the mounting base member is provided with a guide hole connected to the inner peripheral face of the retaining tube, the valve tube is provided with a guide tube portion fitted into the guide hole via a seal and a press-fit tube portion press-fitted into the inner peripheral face of the retaining tube, a leakage channel is provided between the press
  • a radial rib is formed on the mounting base member, the radial rib integrally connecting an outer peripheral face of the retaining tube and an inner peripheral face of the surrounding wall.
  • a pressure regulation path providing communication between a fuel discharge passage of the electric pump and the regulator valve is provided with an orifice.
  • vibration due to opening and closing of the valve body is transmitted to the valve tube, and is transmitted from the press-fit tube portion to the retaining tube, which are press-fitted one into the other, but most of the vibration is absorbed by the gap between the retaining tube and the surrounding wall surrounding the retaining tube, and as a result generation of resonance from the mounting base member can be suppressed, thus contributing to an improvement in the quietness of the fuel supply module.
  • the retaining tube is reinforced effectively by the radial rib providing a connection between the retaining tube and the surrounding wall, the tightening force of the retaining tube on the press-fit tube portion can be stabilized regardless of changes in temperature and the passage of time, and it is particularly effective when the mounting base member is made of a synthetic resin.
  • the pulsations are attenuated by the orifice just before reaching the regulator valve, and it is therefore possible to prevent vibration of the valve body of the regulator valve due to pulsations of the discharge pressure of the electric pump, thereby contributing to a further improvement in the quietness of the fuel supply module.
  • a fuel supply module M of the present invention is mounted on a ceiling wall 1 of a fuel tank T mounted in a vehicle such as a motorcycle, the fuel supply module M supplying fuel within the fuel tank T to an engine fuel injection valve I.
  • the fuel supply module M includes a mounting base member 2, an electric pump Ep, an upper pump holder 3A, a lower pump holder 3B, and a fuel strainer 4, the electric pump Ep being disposed immediately beneath the mounting base member 2 with its axial direction vertical, the upper pump holder 3A being formed integrally with the mounting base member 2, the lower pump holder 3B being detachably joined to the upper pump holder 3A and housing and retaining the electric pump Ep in cooperation with the mounting base member 2, and the fuel strainer 4 being mounted at the lower end of the electric pump Ep.
  • the ceiling wall 1 of the fuel tank T is provided with an opening 5 through which the electric pump Ep is inserted into the tank interior, and is fixedly provided with a mounting ring 6 that surrounds the opening 5.
  • This mounting ring 6 is fixedly provided with a plurality of mounting bolts 7 projecting from an upper face thereof.
  • the mounting base member 2 has a disk-shaped flange portion 2a superimposed on the upper face of the mounting ring 6 so as to block the opening 5.
  • This flange portion 2a is provided with a plurality of bolt holes 11 arranged along the outer periphery thereof, and the mounting base member 2 is fixed to the mounting ring 6 via the plurality of mounting bolts 7 inserted through these bolt holes 11 and a plurality of nuts 8 screwed and tightened on the mounting bolts 7.
  • an annular seal 9 for sealing the opening 5 is disposed between the flange portion 2a and the ceiling wall 1 of the fuel tank T.
  • This mounting base member 2 is made of a synthetic resin; a fuel takeoff pipe 12 projecting horizontally outside the fuel tank T is formed integrally with an upper part of the flange portion 2a, and an outer end part of the fuel takeoff pipe 12 is connected to a fuel supply pipe 33 communicating with the engine fuel injection valve I.
  • the upper pump holder 3A is formed integrally with a lower face of the flange portion 2a. This upper pump holder 3A projects into the interior of the fuel tank T, has a cylindrical shape so that it fits onto the outer periphery of an upper half of the electric pump Ep, and is provided with a plurality of T-shaped latching grooves 13F opening at the lower end and spaced at equal intervals in the peripheral direction.
  • the lower pump holder 3B is made of a synthetic resin in a cylindrical shape so as to house and retain a lower half of the electric pump Ep.
  • Integrally formed with the lower pump holder 3B are a plurality of T-shaped latching tabs 13M projecting from the upper end of the lower pump holder 3B. Engaging these latching tabs 13M with the latching grooves 13F joins the upper pump holder 3A to the lower pump holder 3B.
  • the electric pump Ep is thus housed and retained between the upper pump holder 3A and the lower pump holder 3B.
  • the electric pump Ep is formed from an electric motor E having a rotor 20 facing in the vertical direction, and a fuel pump P driven by the electric motor E.
  • the electric motor E is formed from a cylindrical stator 17 having a plurality of magnets 17a fixedly arranged on the inner periphery in the peripheral direction, an upper bearing bracket 18 joined to the upper end of the stator 17 by crimping, a lower bearing bracket 19 joined to a lower end part of the stator 17, and the rotor 20, which has a rotor shaft 20a supported by the upper and lower bearing brackets 18 and 19.
  • the fuel pump P is arranged as a Wesco type from a pump case 23 and a pump impeller 24, the pump case 23, together with the lower bearing bracket 19, being joined to the stator 17 by crimping so as to form a pump chamber 22 between itself and a lower face of the lower bearing bracket 19, and the pump impeller 24 being rotatably housed in the pump chamber 22 and connected to a lower end part of the rotor shaft 20a.
  • the pump case 23 is provided with a suction port 25 opening in the pump chamber 22, the fuel strainer 4, which is disposed in a bottom part within the fuel tank T, is connected to this suction port 25, and this fuel strainer 4 is mounted on a support shaft 26 projectingly provided on a lower face of the pump case 23 and projecting beneath the lower pump holder 3B.
  • the lower bearing bracket 19 is provided with a discharge port 27 providing communication between the pump chamber 22 and the interior of the stator 17.
  • a fuel discharge pipe 30 projecting thereabove and having a final discharge port 34 communicating with the interior of the stator 17, and provided in the interior of the fuel discharge pipe 30 is a check valve 31 for preventing backflow of fuel into the final discharge port 34.
  • This fuel discharge pipe 30 is fitted from below, via a seal 32, into the inner periphery of a connection tube 29 projectingly provided integrally with a lower face of the mounting base member 2.
  • a regulator valve R communicating with the pressure regulation path 35 via an orifice 36 is retained in the mounting base member 2.
  • the regulator valve R regulates the pressure within the fuel passage 28 at predetermined pressure that is suitable for fuel injection from the fuel injection valve I, and the internal structure thereof and the structure with which it is retained by the mounting base member 2 are explained later.
  • the fuel discharge pipe 30 is disposed on one side of an upper end face of the upper bearing bracket 18, and a power-supplying terminal 47 of the electric motor E is projectingly provided on the other side.
  • a coupler 48 for retaining an outside terminal 49 is formed integrally with an upper face of the mounting base member 2, an inside terminal 52 connected to the outside terminal 49 projects from the lower face of the mounting base member 2, and a cylindrical guide tube 53 surrounding the inside terminal 52 is projectingly provided integrally with the lower face of the mounting base member 2.
  • the power-supplying terminal 47 and the inside terminal 52 are connected by a connector-equipped lead wire 50, thereby providing electrical connection between the inside terminal 52 and the power-supplying terminal 47.
  • the inside terminal 52 is disposed radially outward of the electric pump Ep
  • the regulator valve R is disposed immediately above the power-supplying terminal 47
  • fuel discharged from the regulator valve R drops onto the upper face of the electric pump Ep around the power-supplying terminal 47.
  • a cutout window 51 is provided in a peripheral wall of the upper pump holder 3A.
  • the regulator valve R and the retaining structure therefor are explained by reference to FIG. 3 to FIG. 6 .
  • the regulator valve R includes a cylindrical valve tube 37 equipped with an end wall 37e, the cylindrical valve tube 37 being formed separately from the mounting base member 2, and this valve tube 37 is made of a metal (e.g. stainless steel).
  • a valve hole 38 running through the end wall 37e and communicating with the pressure regulation path 35, and a valve seat 39 connected to the inner end of the valve hole 38.
  • valve body 41 Housed in a valve chamber 40 within the valve tube 37 are a ball-shaped valve body 41, a valve retainer 42, and a valve spring 43, the valve body 41 being formed from a steel ball capable of being seated on the valve seat 39, the valve retainer 42 rotatably supporting the valve body 41 on the opposite side to the valve seat 39, and the valve spring 43 urging the valve body 41 via the valve retainer 42 with a predetermined set load in the direction in which it is seated on the valve seat 39.
  • a guide member 44 supporting a fixed end part of the valve spring 43 and slidably supporting the valve retainer 42 in the opening and closing direction of the valve body 41 is press-fitted into and fixed to an inner peripheral face of the valve tube 37.
  • the valve retainer 42 is formed in an umbrella shape from a flange 42a rotatably supporting the valve body 41 and a stem 42b that projects from a back face of the flange 42a and is slidably supported on the guide member 44.
  • the guide member 44 is provided with a plurality of discharge holes 45 so that the valve chamber 40 opens downward.
  • valve tube 37 is formed from a guide tube portion 37a and a press-fit tube portion 37c having a larger diameter than that of the guide tube portion 37a and connected to the lower end of the guide tube portion 37a via a tapered portion 37b, and an upper end part of the guide tube portion 37a is provided with an annular recess 55 for mounting a seal 56.
  • a retaining tube 57 having its axis extending vertically and its lower end open, a surrounding wall 59 surrounding the retaining tube 57 via a gap 58, and radial ribs 60 providing a connection between the retaining tube 57 and the surrounding wall 59.
  • the mounting base member 2 is also provided with a guide hole 62 connected to the upper end of an inner peripheral face of the retaining tube 57 via a tapered face 61, the guide hole 62 having a smaller diameter than that of the inner peripheral face of the retaining tube 57, and the downstream end of the pressure regulation path 35 opens in a central part of an upper end wall of the guide hole 62.
  • the guide tube portion 37a is loosely fitted into the guide hole 62 while the inner peripheral face of the guide hole 62 makes intimate contact with the seal 56, and while being guided by the fitting the press-fit tube portion 37c is press-fitted into the inner peripheral face of the retaining tube 57.
  • a predetermined press-fitting allowance is imparted in advance to the inner peripheral face of the retaining tube 57 or an outer peripheral face of the press-fit tube portion 37c.
  • the press-fitting of the press-fit tube portion 37c is completed when the guide tube portion 37a abuts against the upper end wall of the guide hole 62.
  • the valve hole 38 of the valve tube 37 communicates with the pressure regulation path 35, and the area around the communicating part is sealed by the seal 56.
  • a plurality of swaging pieces 63 are integrally and projectingly provided at the lower end of the retaining tube 57, and these swaging pieces 63 are hot-swaged inward in the radial direction after the press-fit tube portion 37c is press-fitted into the retaining tube 57, thus retaining the lower end of the press-fit tube portion 37c. This reinforces the retention of the valve tube 37 by the retaining tube 57.
  • a leakage channel 64 for making the guide hole 62 beneath the seal 56 open beneath the retaining tube 57 is provided in the inner peripheral face of the retaining tube 57 and/or the outer peripheral face of the press-fit tube portion 37c.
  • the retaining tube 57 is reinforced effectively by the ribs 60, the tightening force of the retaining tube 57 on the press-fit tube portion 37c can be stabilized regardless of changes in temperature and the passage of time, and it is particularly effective when the mounting base member 2 is made of a synthetic resin.
  • FIG. 7 Another embodiment of the present invention shown in FIG. 7 is now explained.
  • press-fit portions 57a into which a press-fit tube portion 37c of a valve tube 37 is press-fitted are provided at a plurality of positions in the peripheral direction on an inner peripheral face of a retaining tube 57, and leakage channels 64 are formed between these press-fit portions 57a.
  • the press-fitting stress can be relieved. Since the arrangement is otherwise the same as that of the preceding embodiment, portions in FIG. 7 corresponding to those in the preceding embodiment are denoted by the same reference numerals and symbols, and duplication of the explanation is omitted.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Fuel-Injection Apparatus (AREA)
EP09726346.1A 2008-03-26 2009-03-10 Fuel supply module Not-in-force EP2256331B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2008080572A JP5276868B2 (ja) 2008-03-26 2008-03-26 燃料供給モジュール
PCT/JP2009/054508 WO2009119304A1 (ja) 2008-03-26 2009-03-10 燃料供給モジュール

Publications (3)

Publication Number Publication Date
EP2256331A1 EP2256331A1 (en) 2010-12-01
EP2256331A4 EP2256331A4 (en) 2013-10-09
EP2256331B1 true EP2256331B1 (en) 2016-05-11

Family

ID=41113503

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09726346.1A Not-in-force EP2256331B1 (en) 2008-03-26 2009-03-10 Fuel supply module

Country Status (5)

Country Link
EP (1) EP2256331B1 (ja)
JP (1) JP5276868B2 (ja)
CN (1) CN101970850B (ja)
ES (1) ES2572815T3 (ja)
WO (1) WO2009119304A1 (ja)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101005096B1 (ko) * 2010-10-25 2010-12-30 주식회사 코아비스 진동 감쇄를 위한 연료펌프 모듈
JP5666331B2 (ja) * 2011-02-08 2015-02-12 京三電機株式会社 燃料供給装置
JP2012237227A (ja) * 2011-05-11 2012-12-06 Suzuki Motor Corp 燃料ポンプ構造
JP5975680B2 (ja) * 2012-03-01 2016-08-23 本田技研工業株式会社 鞍乗型車両の燃料供給装置
FR3006383B1 (fr) * 2013-05-28 2016-09-09 Delphi Automotive Systems Lux Module de pompage de carburant
JP6391084B2 (ja) * 2013-11-14 2018-09-19 株式会社ケーヒン 圧力調整弁装置
JP6338181B2 (ja) * 2014-03-28 2018-06-06 株式会社ケーヒン 燃料供給装置
WO2017203589A1 (ja) * 2016-05-24 2017-11-30 株式会社ミツバ 圧力制御装置および燃料供給装置
CN108237896B (zh) * 2018-02-07 2024-01-26 斯丹德汽车系统（苏州）有限公司 一种燃油系统界面结构

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0545817Y2 (ja) * 1989-08-16 1993-11-26
FR2715973B1 (fr) * 1994-02-08 1996-04-26 Marwal Systems Régulateur de pression interne à l'embase d'un ensemble de puisage.
JPH08261083A (ja) * 1995-03-23 1996-10-08 Nippondenso Co Ltd インタンク式燃料ポンプ
US6405717B1 (en) * 2000-08-01 2002-06-18 Delphi Technologies, Inc. Fuel pump module assembly
JP2003254200A (ja) * 2002-02-28 2003-09-10 Denso Corp 燃料リターン装置
JP3887821B2 (ja) * 2003-03-14 2007-02-28 株式会社デンソー 燃料供給装置
JP2005188383A (ja) * 2003-12-25 2005-07-14 Denso Corp ポンプモジュール
CN2842014Y (zh) * 2005-10-26 2006-11-29 哈尔滨东安汽车动力股份有限公司 发动机用机油泵
JP2007255192A (ja) * 2006-03-20 2007-10-04 Aisan Ind Co Ltd 燃料フィルタ及び燃料供給装置
JP5048265B2 (ja) * 2006-04-21 2012-10-17 株式会社ケーヒン 燃料供給モジュール
JP4921839B2 (ja) 2006-04-21 2012-04-25 株式会社ケーヒン 電動ポンプ保持装置
JP2008062878A (ja) * 2006-09-11 2008-03-21 Toyoda Gosei Co Ltd 燃料タンク装着部品

Also Published As

Publication number Publication date
WO2009119304A1 (ja) 2009-10-01
CN101970850A (zh) 2011-02-09
JP2009235942A (ja) 2009-10-15
ES2572815T3 (es) 2016-06-02
EP2256331A4 (en) 2013-10-09
EP2256331A1 (en) 2010-12-01
JP5276868B2 (ja) 2013-08-28
CN101970850B (zh) 2013-10-23

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