EP1657099B1 - Fuel pump unit - Google Patents

Fuel pump unit Download PDF

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Publication number
EP1657099B1
EP1657099B1 EP20050077581 EP05077581A EP1657099B1 EP 1657099 B1 EP1657099 B1 EP 1657099B1 EP 20050077581 EP20050077581 EP 20050077581 EP 05077581 A EP05077581 A EP 05077581A EP 1657099 B1 EP1657099 B1 EP 1657099B1
Authority
EP
European Patent Office
Prior art keywords
fuel
pump
discharge path
fuel tank
fuel 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.)
Active
Application number
EP20050077581
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1657099A3 (en
EP1657099A2 (en
Inventor
Motoki; c/o Kawasaki Plant Akimoto
Mitsuyuki; c/o Kawasaki Plant Nakagawa
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.)
Keihin Corp
Original Assignee
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 Keihin Corp filed Critical Keihin Corp
Publication of EP1657099A2 publication Critical patent/EP1657099A2/en
Publication of EP1657099A3 publication Critical patent/EP1657099A3/en
Application granted granted Critical
Publication of EP1657099B1 publication Critical patent/EP1657099B1/en
Active 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/04—Means for damping vibrations or pressure fluctuations in injection pump inlets or outlets
    • 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
    • F02M37/0041—Means for damping pressure pulsations

Definitions

  • the present invention relates to a fuel pump unit apparatus which boosts fuel within a fuel tank by a fuel pump, regulates a pressure of the boosted fuel to a predetermined pressure by a pressure regulator, and is used in a fuel injection apparatus in which the fuel is supplied to an engine via a fuel injection valve.
  • Reference symbol T denotes a fuel tank inside which a fuel is reserved.
  • a unit insertion hole Tb is formed in a bottom portion Ta of the fuel tank T.
  • a fuel pump unit apparatus U is formed in the following manner.
  • Reference numeral (20) denotes a closing member inserted into the unit insertion hole Tb of the fuel tank T so as to be arranged in the bottom portion Ta of the fuel tank T.
  • the closing member (20) is provided with a collar portion (20a) arranged so as to be brought into contact with the bottom portion Ta of the fuel tank T, and an insertion tube portion (20b) protruding toward an upper side from the collar portion (20a) and arranged so as to be inserted into the unit insertion hole Tb.
  • an external fuel discharge path (20c) is provided from an upper end (20ba) of the insertion tube portion toward an outer side, an upper end of the external fuel discharge path (20c) is open to the upper end (20ba) of the insertion tube portion (20b), and a lower end thereof is open to an outer side toward a side portion.
  • Reference numeral (21) denotes a support member fixedly arranged on the upper end (20ba) of the insertion tube portion (20b) of the closing member (20).
  • the support member (21) is formed by a contact portion (21a) brought into contact with the upper end (20ba) of the insertion tube portion (20b), a coupling portion (21b) formed so as to be folded toward an upper side from the contact portion (21a), and a support portion (21c) formed so as to be folded toward a left side from an upper end of the coupling portion (21b).
  • first through hole (21ca) and a second through hole (21cb) are provided through in the support portion.
  • reference numeral (22) denotes a hold member fixedly arranged on the support portion (21c) of the support member (21).
  • the hold member (22) is formed by a tubular first hold member (23) arranged on the support portion (21c), and a closed-end tubular second hold member (24) arranged so as to be fitted to the first hold member (23) , and a fuel chamber (25) is formed by an upper end of the first hold member (23) and a bottom portion of the second hold member (24).
  • a pump discharge path insertion hole (23a), a fuel pipe insertion hole (23b) and a regulator fuel insertion hole (24a) are open to an inner side of the fuel chamber (25).
  • the pump discharge path insertion hole (23a) and the fuel pipe insertion hole (23b) are provided from an upper end of the first hold member (23) toward a lower end, and the regulator fuel insertion hole (24a) is provided from a bottom portion of the second hold member (24) toward an upper end.
  • a fuel introduction path Ra of a pressure regulator R is inserted to the regulator fuel insertion hole, whereby the pressure regulator R is fixed to the hold member (22).
  • the hold member (22) constituted by the first hold member (23) and the second hold member (24) is fixedly arranged on the support portion (21c) of the support member (21), and the pressure regulator R is fixedly arranged in the hold member (22).
  • the contact portion (21a) of the support member (21) is screwed and fixedly arranged on the upper end (20ba) of the insertion tube portion (20b) of the closing member (20) by a screw (26).
  • the fuel pump P is pinched by a lock step portion (20d) formed in the closing member (20) and the support portion (21c) of the support member (21), and a pump discharge path Pb is inserted into the pump discharge path insertion hole (23a) of the first hold member (23).
  • an upper end of a fuel pipe (27) is inserted to the fuel pipe insertion hole (21b) of the first hold member (23) , and a lower end is inserted to the external fuel discharge path (20c) of the closing member (20).
  • reference symbol S denotes a strainer connected to a pump suction path Pa of the fuel pump P.
  • the strainer S is arranged within an inner concave portion (20e) of the insertion tube portion (20b).
  • the fuel pump unit apparatus U is arranged so as to be inserted into the fuel tank T via the unit insertion hole Tb in the bottom portion Ta of the fuel tank T, the insertion tube portion (20b) of the closing member (20) is inserted into the unit insertion hole Tb of the fuel tank T and the collar portion (20a) is arranged so as to be brought into contact with the bottom portion Ta of the fuel tank T.
  • the collar portion (20a) is screwed with the bottom portion Ta of the fuel tank T via a screw (28), whereby the fuel pump unit apparatus U is fixed to the fuel tank T.
  • the fuel pump P including the strainer S and the pressure regulator R are arranged within the fuel tank T, and the external fuel discharge path (20c) is arranged so as to be open to an outer side of the fuel tank T.
  • EP 1 467 083 A1 discloses a fuel pump unit apparatus according to the preamble of claim 1.
  • the fuel reserved within the fuel tank T is filtered by the strainer S so as to be sucked into the fuel pump P via the pump suction path Pa, and the fuel boosted by the fuel pump P is discharged into the fuel chamber (25) via the pump discharge path insertion hole (23a) from the pump discharge path Pb.
  • a part of the fuel within the fuel chamber (25) is introduced into the fuel chamber Rb via the fuel introduction path Ra, and regulates the pressure within the fuel chamber (25) to a predetermined fuel pressure on the basis of a pressure regulating effect of the valve body Rc.
  • the fuel having the regulated pressure is introduced into the fuel pipe (27) from the fuel chamber (25), and is supplied to an external fuel injection valve (not shown) through the external fuel discharge path (20c).
  • the support member (21) is formed by pressing a plate material, and it is necessary to employ a thick plate material for securing sufficient rigidity. Accordingly, it is hard to perform pressing for the support member (21) and it is impossible to reduce the manufacturing cost.
  • a fuel pump unit apparatus in accordance with the present invention is made by taking the problems mentioned above into consideration, and an object of the present invention is to provide the apparatus which can reduce the number of parts and assembling man hour and is inexpensive.
  • a fuel pump unit apparatus as defined by claim 1.
  • the apparatus comprises:
  • the fuel pump unit apparatus on the basis of the present invention, it is possible to pinch the fuel pump provided with the strainer between the closing member and the holder member by fixedly arranging the holder member to the closing member, the pump discharge path of the fuel pump and the fuel introduction path of the pressure regulator are connected to the internal fuel discharge path formed within the holder member, and the internal fuel discharge path is connected to the external fuel discharge path of the closing member.
  • the support member of the fuel pump unit apparatus is formed by the closing member and the holder member, and in particular, the pump discharge path of the fuel pump and the fuel introduction path of the pressure regulator are connected to the internal fuel discharge path formed within the holder member and the internal fuel discharge path is connected to the external fuel discharge path, it is possible to reduce the number of parts, assembling man hour and the airtightness inspection steps. Accordingly, it is possible to provide an inexpensive and compact fuel pump unit apparatus.
  • the holder member is formed in accordance with an injection molding. Accordingly, it is possible to easily support the fuel pump and the pressure regulator as well as it is possible to properly improve rigidity of the holder member.
  • Reference numeral (1) denotes a closing member inserted into the unit insertion hole Tb of the fuel tank T so as to be arranged in the bottom portion Ta of the fuel tank T.
  • the closing member (1) is provided with a collar portion (1a) arranged so as to be brought into contact with the bottom portion Ta of the fuel tank T, and an insertion tube portion (1b) protruding toward an upper side from the collar portion (1a) and arranged so as to be inserted into the unit insertion hole Tb.
  • an external fuel discharge path (1c) is provided from an upper end (1ba) of the insertion tube portion toward an outer side, an upper end of the external fuel discharge path (1c) is open to the upper end (1ba) of the insertion tube portion (1b), and a lower end thereof is open to an outer side toward a side portion.
  • Reference numeral (2) denotes a holder member.
  • a pump support step portion (2a) facing to the upper end surface Pc of the fuel pump P is formed in an upper side of the holder member (2), and an internal fuel discharge path (2c) is provided from the pump support step portion (2a) via a pump discharge path insertion hole (2b).
  • the internal fuel discharge path (2c) is formed in an inverse-L shape within the holder member (2) and is open toward a lower side.
  • a regulator fuel insertion hole (2d) is formed so as to be open to the internal fuel discharge path (2c).
  • the regulator fuel insertion hole (2d) is formed so as to be open toward a right side from the internal fuel discharge path (2c).
  • reference symbol (2e) denotes a collar portion formed toward a left side from a lower side of the holder member (2) so as to face to the upper end (1ba) of the insertion tube portion (1b).
  • the fuel introduction path Ra of the pressure regulator R is inserted to the regulator fuel insertion hole (2d) of the holder member (2), and the pressure regulator R is fixed to the holder member (2).
  • the collar portion (2e) of the holder member (2) is arranged on the upper end (1ba) of the insertion tube portion (1b) of the closing member (1), and the holder member (2) is screwed and fixed to the closing member (1) by a screw (26).
  • the support member (3) integrated by the holder member (2) and the closing member (1) is formed.
  • the lower end of the internal fuel discharge path (2c) is arranged so as to be connected to the external fuel discharge path (1c) of the closing member (1).
  • the fuel pump P is pinched between the pump support step portion (2a) of the holder member (2) and the support step portion (1d) of the closing member (1) via a packing (4), and the pump discharge path Pb is arranged so as to be inserted into the discharge path insertion hole (2b).
  • the strainer S is connected to the pump inflow path Pa of the fuel pump P, and the strainer S is arranged in an inner side of the insertion tube portion (1b).
  • the fuel flow path constituted by the internal fuel discharge path (2c) and the external fuel discharge path (1c) is formed within the support member (3), and the pump discharge path Pb of the fuel pump P and the fuel introduction path Ra of the pressure regulator R are connected toward the internal fuel discharge path (2c).
  • the support member (3) structured in the manner mentioned above is arranged within the fuel tank T, the insertion tube portion (1b) of the closing member (1) is arranged so as to be inserted into the unit insertion hole Tb of the fuel tank T, and the collar portion (1a) is arranged on the bottom portion Ta of the fuel tank T. In this state, the collar portion (1a) is screwed and fixed toward the bottom portion Ta of the fuel tank T by a screw (28).
  • the unit insertion hole Tb of the fuel tank T is closed by the collar portion (1a) of the closing member (1), the fuel pump P including the strainer S attached to the holder member (2) and the pressure regulator R are arranged within the fuel tank T, and the external fuel discharge path (1c) connected to the internal fuel discharge path (2c) provided in the holder member (2) is arranged so as to be open toward the outer portion from the closing member (1).
  • the fuel pump P sucks the fuel within the fuel tank T, from which a foreign material is removed by the strainer S, via the pump suction path Pa and boosts the fuel within the fuel pump P, and the boosted fuel is discharged into the internal fuel discharge path (2c) via the pump discharge path Pb.
  • a part of the fuel within the internal fuel discharge path (2c) is introduced into the pressure regulator R via the regulator fuel introduction hole (2d), a pressure thereof is regulated to a desired fuel pressure by the pressure regulator R, and the fuel having the regulated pressure is supplied toward the external portion via the internal fuel discharge path (2c) and the external fuel discharge path (1c).
  • the support member (3) is formed by the closing member (1) and the holder member (2), the internal fuel discharge path (2c) is formed within the holder member (2), the pressure regulator R is attached to the holder member (2), and the fuel pump P is pinched between the closing member (1) and the holder member (2), it is possible to reduce the number of parts and assembling man hour in comparison with the conventional fuel pump unit apparatus, whereby it is possible to largely reduce the manufacturing cost.
  • the holder member (2) is formed in accordance with an injection molding by forming the internal fuel discharge path (2c) within the holder member (2), whereby it is possible to very simply increase rigidity of the holder member and it is possible to arrange the holder member compact.

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)
  • Fuel-Injection Apparatus (AREA)
  • Details Of Reciprocating Pumps (AREA)
EP20050077581 2004-11-16 2005-11-10 Fuel pump unit Active EP1657099B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2004331315A JP2006144553A (ja) 2004-11-16 2004-11-16 燃料ポンプユニット装置

Publications (3)

Publication Number Publication Date
EP1657099A2 EP1657099A2 (en) 2006-05-17
EP1657099A3 EP1657099A3 (en) 2011-07-27
EP1657099B1 true EP1657099B1 (en) 2013-10-16

Family

ID=35840254

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20050077581 Active EP1657099B1 (en) 2004-11-16 2005-11-10 Fuel pump unit

Country Status (3)

Country Link
EP (1) EP1657099B1 (ja)
JP (1) JP2006144553A (ja)
DE (1) DE05077581T1 (ja)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4575335B2 (ja) * 2006-06-30 2010-11-04 本田技研工業株式会社 燃料タンク
JP4690969B2 (ja) * 2006-08-24 2011-06-01 株式会社ケーヒン 二輪車用の燃料供給装置
JP2008075528A (ja) * 2006-09-21 2008-04-03 Keihin Corp 二輪車における燃料供給装置の取付け構造
JP2008082263A (ja) * 2006-09-28 2008-04-10 Aisan Ind Co Ltd 燃料供給装置
JP4944568B2 (ja) * 2006-10-26 2012-06-06 株式会社ケーヒン 燃料供給装置
JP4804404B2 (ja) 2007-04-06 2011-11-02 愛三工業株式会社 燃料ポンプ装置及び燃料供給装置
JP4661947B2 (ja) * 2008-03-21 2011-03-30 株式会社デンソー ポンプモジュール
JP5235089B2 (ja) * 2008-03-27 2013-07-10 本田技研工業株式会社 燃料ポンプ取付構造
JP5554055B2 (ja) * 2009-12-09 2014-07-23 愛三工業株式会社 燃料供給装置
JP5601972B2 (ja) * 2010-10-29 2014-10-08 株式会社ケーヒン 燃料供給ユニット
JP5859737B2 (ja) * 2011-03-22 2016-02-16 本田技研工業株式会社 車両用燃料供給装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3611380B2 (ja) * 1995-10-20 2005-01-19 株式会社キーレックス 燃料タンク装置
JP4042267B2 (ja) * 1999-08-03 2008-02-06 株式会社ケーヒン 燃料噴射装置における燃料供給装置
JP4410384B2 (ja) * 2000-05-29 2010-02-03 株式会社ミツバ 燃料ポンプモジュール
JPWO2003044357A1 (ja) * 2001-11-20 2005-03-24 三菱電機株式会社 車両用燃料供給装置

Also Published As

Publication number Publication date
EP1657099A3 (en) 2011-07-27
JP2006144553A (ja) 2006-06-08
DE05077581T1 (de) 2006-12-28
EP1657099A2 (en) 2006-05-17

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