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US20080216904A1 - Fuel supply system - Google Patents

Fuel supply system Download PDF

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Publication number
US20080216904A1
US20080216904A1 US11/836,421 US83642107A US2008216904A1 US 20080216904 A1 US20080216904 A1 US 20080216904A1 US 83642107 A US83642107 A US 83642107A US 2008216904 A1 US2008216904 A1 US 2008216904A1
Authority
US
United States
Prior art keywords
fuel
case
filter
supply system
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.)
Abandoned
Application number
US11/836,421
Other languages
English (en)
Inventor
Shigeki Kanamaru
Hiroshi Yoshioka
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Assigned to MITSUBISHI ELECTRIC CORPORATION reassignment MITSUBISHI ELECTRIC CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KANAMARU, SHIGEKI, YOSHIOKA, HIROSHI
Publication of US20080216904A1 publication Critical patent/US20080216904A1/en
Abandoned 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
    • F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
    • F02M37/32—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements
    • F02M37/44—Filters structurally associated with 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
    • F02M37/04—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
    • F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
    • F02M37/32—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements
    • F02M37/50—Filters arranged in or on fuel tanks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
    • B01D29/56—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
    • B01D35/027—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks rigidly mounted in or on tanks or reservoirs
    • B01D35/0273—Filtering elements with a horizontal or inclined rotation or symmetry axis submerged in tanks or reservoirs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
    • B01D35/027—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks rigidly mounted in or on tanks or reservoirs
    • B01D35/0276—Filtering elements with a vertical rotation or symmetry axis mounted on tanks or reservoirs
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/85978—With pump

Definitions

  • the present invention relates to a fusel supply system for feeding under pressure fuel within a fuel to injectors of an internal combustion engine of a vehicle, and more particularly to a structure capable of improving a mounting property to the inside of the fuel tank and an antivibration property.
  • a suction filter made of, for example, a nylon mesh material having relatively rough meshes
  • foreign substances including foreign substances having passed through the suction filter and dust resulting from wear of a brush, a commutator and the like which form a motor unit of the fuel pump are captured by a high-pressure filter such as a filter element made of paper provided downstream of the fuel pump (that is, next stage of the fuel pump along a fuel flow path).
  • the suction filter Since the suction filter is located in a so-called upstreammost position in a fuel supply line, the suction filter is generally located in a lowest bottom portion of the fuel tank so that fuel still can be supplied even though fuel remaining with the fuel tank is reduced.
  • the high-pressure filter is provided on a flange of the fuel supply system, that is, directly underneath an upper side of the fuel tank so as to send fuel discharged from the high-pressure filter to, for example, a discharge pipe provided on the flange without any delay.
  • a feeding pin can be insert molded in the lid and static electricity can be discharged from the lower housing.
  • a lower housing is required to cover the height dimension of the filter element, and this means that a welding portion between the lid, which prevents the leakage of fuel, and the lower housing has to lie in the vicinity of a root portion where high stress is highly possibly expected to occur.
  • the strength of the welding portion of resins tends to be lower than the strength of matrix resins, and because of this. Therefore, in case strong vibrations generated while the vehicle is being driven are applied to the welding portion, the welding portion may cracks and fuel leakage may be caused.
  • a yoke included in the fuel pump includes a first cylindrical yoke disposed on an inner circumference of a ring-shaped magnet of a rare earth and a second cylindrical yoke provided on an outer circumference of the first cylindrical yoke, whereby even with a magnet of a rare earth of a high holding force which requires a strong magnetizing force, the degree of freedom in configuring a magnetic circuit by the magnet and the yoke increases, and the miniaturization of a magnetizer for the magnet and, hence, the reduction in the axial size of the fuel pump are able to be attained.
  • An object of the invention is to provide a fuel supply system in which no fuel leakage is caused from not only the welding portions but also a filter case that accommodates a filter element therein by using a shortened fuel pump.
  • a fuel supply system including: a flange mounted at an upper opening in a fuel tank; a fuel pump that discharges fuel in the fuel tank; a high-pressure filter that filters fuel discharged from the fuel pump; and a filter case that accommodates the high-pressure filter and includes an upper case and a lower case, the upper case integrally formed with the flange, wherein the fuel pump is fitted to an underside of the lower case to be positioned substantially coaxial with the high-pressure filter.
  • FIG. 1 is an external perspective view of a fuel supply system according to an embodiment of the invention
  • FIG. 2 is an exploded perspective view of the fuel supply system in FIG. 1 ;
  • FIG. 3 is a sectional view of a fuel pump in FIG. 1 .
  • a fuel supply system 101 includes: a flange 1 that is formed from an insulating resin and integrally molded to include an upper case 1 a that incorporates therein an element that forms a high-pressure filter (described later); a lower case 2 made from an insulating resin to be secured to the upper case 1 a through heat plate welding; a pump holder 3 engaged with the lower case through, for example, snap-fit and to hold therein a fuel pump (described later); and a suction filter 4 inserted from an opening in the pump holder 3 so as to be fitted to a suction port of the fuel pump.
  • reference numeral 1 c denotes a connector molded integrally with the flange 1 for supplying electric power to the fuel pump, the illustration of lead wires that are provided to extend from the connector 1 c are omitted.
  • a filter case 5 is formed by the upper case 1 a and the lower case 2 .
  • An element 6 is inserted in the upper case 1 a .
  • the element 6 is obtained by mounting a member 6 b on an outer circumference of an inner tube 6 a .
  • the mounting member 6 b is obtained by forming a sheet of a material, such as resin fibers of polyester added to pulp, around an axis of the inner tube 6 a in a chrysanthemum-like fashion.
  • the inner tube 6 a has upper and lower collar portions and which is formed from a conductive resin.
  • An axial dimension of the upper case 1 a is equal to an overall length of the element 6 .
  • the filter case 5 is formed by securing both the upper case 1 a and the lower case 2 together through heat plate welding, and as this occurs, since the inner tube 6 a and the lower case 2 are also welded together at the same time, the element 6 also comes to be secured.
  • a plurality of communication holes which establish a communication between the inside and outside of the inner tube 6 a are provided in the vicinity of a lower portion of the upper collar portion of the inner tube 6 a , and the inner tube 6 a communicates with the discharge pipe 1 b . Therefore, a fuel path is secured from a discharge pipe of the fuel pump to the discharge pipe 1 b.
  • An opening 3 a is provided in a bottom side of the pump holder 3 , and a recess portion is formed to match the configuration of a bottom portion of the fuel pump 7 (see FIG. 3 ), whereby when the fuel pump 7 is inserted into the pump holder 3 , the fuel pump 7 comes to be held in a predetermined position within the pump holder 3 .
  • a suction port 21 a of the fuel pump 7 is positioned in the opening 3 a , a connecting portion 4 a of the suction filter 4 is connected to the suction port 21 a , whereby fuel inside the fuel tank (not shown) is sucked by the fuel pump 7 via the suction filter 4 .
  • a fuel suction port 2 a is provided in the lower case 2 , and this fuel suction port 2 a is securely fitted on a discharge pipe 15 a of the fuel pump 7 via a connecting pipe 8 when the lower case 2 is engaged with the pump holder 3 through snap-fit in the way described above, whereby the fuel supply system 101 is completed, that is, a fuel flow path from the suction filter 4 to the discharge pipe 1 b is completed.
  • the opening in the upper side of the fuel tank is closed by the flange 1 , and fuel inside the fuel tank is pressurized by driving the fuel pump 7 and supplied to injectors of a fuel injection system via a fuel hose (not shown) that is connected to the discharge pipe 1 b.
  • the fuel pump 7 includes the motor portion 10 and a pump portion 20 .
  • a magnet 13 of a cylindrical shape is disposed on an inner circumferential surface of a yoke 11 to be spaced at a predetermined distance from an outer circumferential surface of an armature 12 . Together with the yoke 11 , the magnet 13 forms a magnetic circuit at an outer circumference of the armature 12 .
  • the yoke 11 includes a first cylindrical yoke 11 a and a second cylindrical yoke 11 b , which are made of an STKM (a carbon steel pipe for machine structure), in which the first cylindrical yoke 11 a is press fitted in the second tubular yoke 11 b from an axial direction until the first cylindrical yoke 11 a comes into abutment with a projecting portion 11 c of the second cylindrical yoke 11 b.
  • STKM carbon steel pipe for machine structure
  • the second cylindrical yoke 11 b integrates the following components together which include a bearing holder 15 , an inlet housing 21 and an outlet housing 22 .
  • the bearing holder 15 which is formed of an insulating resin mainly made of polyacetal, accommodates therein a check valve 16 , a bearing 17 which supports the shaft 14 , a conductive brush 18 , a coil spring 19 which pushes the brush 18 against a commutator 12 a , a lead wire 18 a which supplies a current to the brush 18 through a connector 1 c (refer to FIG. 1 ) and the like.
  • a shaft stopper 23 is accommodated in the inlet housing 21 , which is formed from a resin, and the inlet port 21 a is formed in the inlet housing 21 .
  • the outlet housing 22 is also formed from a resin, and a discharge port 22 a is provided therein for discharging fuel which is pressurized in a flow path 24 toward the armature 12 , and a bearing 25 which rotatably supports the shaft 14 is also accommodated in the outlet housing 22 .
  • a D-cut portion 14 a formed into a D-shape in cross section at an end portion of the shaft 14 is fitted in a D-shaped hole in a central portion of an impeller 26 formed from a resin and having a plurality of blade grooves formed on an outer circumference thereof.
  • the flow path 24 is formed by the plurality of blade grooves on the impeller 26 and recessed grooves 21 b , 22 b respectively formed on the inlet housing 21 and the outlet housing 22 .
  • the operation of the fuel pump 17 will be described.
  • the armature 12 rotates together with the impeller 16 on the shaft 14 as a rotational shaft based on the principle of direct current electric motor.
  • fuel within the fuel tank is introduced to the suction port 21 a after foreign matters contained therein have been removed at the suction filter 4 .
  • the fuel is pressurized within the flow path 24 and passes through the discharge port 22 a , thereby entering a space within the motor portion 10 .
  • the pressurized fuel When flowing through a space between the armature 12 and the magnet 13 inside the motor portion 10 , the pressurized fuel cools the armature 12 and causes the check valve 16 to open so as for the fuel to be discharged from the discharge pipe 15 a .
  • the discharged pressurized fuel is introduced into the element 6 , where foreign substances including foreign matters having passed through the suction filter 4 and dust resulting from wear of the brush 18 and the like are captured, and is thereafter supplied to injectors of the fuel injection system.
  • the filter case 5 is streamlined, or more specifically, an outside diameter thereof is made equal to or smaller than that of the pump holder 3 , and the filter case 5 and the pump holder 3 are provided so that axial centers thereof are aligned substantially coaxially. Consequently, a difference in outside diameter between the flange 1 and the filter case 5 can be increased without increasing (changing) the outside diameter of the flange 1 .
  • the filter case 5 is formed by welding the upper case 1 a and the lower case 2 together, there occurs neither fuel leakage from the securing portion where the upper and lower cases are secured to each other through such welding nor reduction in fuel pressure due to such a fuel leakage. Furthermore, in the embodiment, since static electricity generated when the pressurized fuel passes through the element 6 is discharged via the inner tube 6 a , an inexpensive insulating resin is used for the upper case 1 a having a relatively large surface area, and since the upper case 1 a is formed integrally with the flange 1 , as described above, the securing portion resulting from the welding is provided below the element 6 . Namely, since the securing portion is spaced apart from the root portion so that generation of stress is reduced remarkably, the inexpensive fuel supply system can be provided which is free from fuel leakage from the securing portion which would otherwise be caused due to vibrations being applied thereto.
  • the so-called heat plate welding becomes possible, whereby in conjunction with the fact that the formation of the filter case 5 is implemented at the same time that the element 6 is fixed, the production costs can be expected to be reduced.
  • a pressure regulator used to maintain the pressure of fuel in supply thereof is not included, such a pressure regulator is not necessarily attached to the fuel supply system or is not necessarily an element in the fuel supply system. Instead, a method may be adopted in which a pressure regulator is provided outside the fuel tank and between the discharge pipe 1 b and the injectors, and a pipe for excess fuel therefrom is inserted into the fuel tank.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US11/836,421 2007-03-07 2007-08-09 Fuel supply system Abandoned US20080216904A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007057516A JP4561761B2 (ja) 2007-03-07 2007-03-07 燃料供給装置
JP2007-057516 2007-03-07

Publications (1)

Publication Number Publication Date
US20080216904A1 true US20080216904A1 (en) 2008-09-11

Family

ID=39740440

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/836,421 Abandoned US20080216904A1 (en) 2007-03-07 2007-08-09 Fuel supply system

Country Status (5)

Country Link
US (1) US20080216904A1 (zh)
JP (1) JP4561761B2 (zh)
KR (1) KR20080082425A (zh)
CN (1) CN101260853B (zh)
TW (1) TWI341365B (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110192381A1 (en) * 2010-02-09 2011-08-11 Denso Corporation Fuel supply apparatus
US20180138775A1 (en) * 2015-07-16 2018-05-17 Continental Automotive Gmbh Fuel delivery pump

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102052217B (zh) * 2009-11-05 2013-03-06 三菱电机株式会社 燃料供给装置
JP5110099B2 (ja) * 2010-02-09 2012-12-26 株式会社デンソー 燃料供給装置
JP5713665B2 (ja) * 2010-12-27 2015-05-07 三菱電機株式会社 燃料供給装置
JP6444481B1 (ja) * 2017-12-14 2018-12-26 株式会社ケーヒン 燃料供給装置の製造方法
WO2019151296A1 (ja) * 2018-02-01 2019-08-08 株式会社デンソー 燃料供給装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5520156A (en) * 1993-02-26 1996-05-28 Technoflow Tube-Systems Gmbh Internal combustion engine apparatus with fuel filter for motor vehicle
US20050118044A1 (en) * 2003-02-14 2005-06-02 Seizo Inoue Dc motor type fuel pump

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0612100B2 (ja) * 1989-01-19 1994-02-16 京三電機株式会社 自動車用燃料供給装置
JPH11241659A (ja) * 1998-02-25 1999-09-07 Mitsubishi Electric Corp 燃料供給装置
JP2004124817A (ja) * 2002-10-02 2004-04-22 Mitsubishi Electric Corp 燃料ポンプモジュールおよび車両用の燃料タンク内圧センサ
JP2005226459A (ja) * 2004-02-10 2005-08-25 Nifco Inc 燃料フィルタの燃料ポンプとの結合部の構造

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5520156A (en) * 1993-02-26 1996-05-28 Technoflow Tube-Systems Gmbh Internal combustion engine apparatus with fuel filter for motor vehicle
US20050118044A1 (en) * 2003-02-14 2005-06-02 Seizo Inoue Dc motor type fuel pump

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110192381A1 (en) * 2010-02-09 2011-08-11 Denso Corporation Fuel supply apparatus
US8869775B2 (en) 2010-02-09 2014-10-28 Denso Corporation Fuel supply apparatus
US20180138775A1 (en) * 2015-07-16 2018-05-17 Continental Automotive Gmbh Fuel delivery pump
US10330108B2 (en) * 2015-07-16 2019-06-25 Continental Automotive Gmbh Fuel pump having electrically insulated bearings

Also Published As

Publication number Publication date
TWI341365B (en) 2011-05-01
TW200837274A (en) 2008-09-16
CN101260853A (zh) 2008-09-10
CN101260853B (zh) 2012-05-30
JP4561761B2 (ja) 2010-10-13
JP2008215305A (ja) 2008-09-18
KR20080082425A (ko) 2008-09-11

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Legal Events

Date Code Title Description
AS Assignment

Owner name: MITSUBISHI ELECTRIC CORPORATION, JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KANAMARU, SHIGEKI;YOSHIOKA, HIROSHI;REEL/FRAME:019673/0641

Effective date: 20070731

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION