EP1801412A2 - Dispositif d'alimentation en carburant pour deux soupapes d'injection d'un élément de papillon des gaz - Google Patents

Dispositif d'alimentation en carburant pour deux soupapes d'injection d'un élément de papillon des gaz Download PDF

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Publication number
EP1801412A2
EP1801412A2 EP06124464A EP06124464A EP1801412A2 EP 1801412 A2 EP1801412 A2 EP 1801412A2 EP 06124464 A EP06124464 A EP 06124464A EP 06124464 A EP06124464 A EP 06124464A EP 1801412 A2 EP1801412 A2 EP 1801412A2
Authority
EP
European Patent Office
Prior art keywords
fuel
injection valve
fuel injection
pipe
insertion hole
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.)
Granted
Application number
EP06124464A
Other languages
German (de)
English (en)
Other versions
EP1801412A3 (fr
EP1801412B1 (fr
Inventor
Yasushi c/o Kawasaki Plant Keihin Corp. KONDO
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 EP1801412A2 publication Critical patent/EP1801412A2/fr
Publication of EP1801412A3 publication Critical patent/EP1801412A3/fr
Application granted granted Critical
Publication of EP1801412B1 publication Critical patent/EP1801412B1/fr
Expired - Fee Related 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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/04—Injectors peculiar thereto
    • F02M69/042—Positioning of injectors with respect to engine, e.g. in the air intake conduit
    • F02M69/043—Positioning of injectors with respect to engine, e.g. in the air intake conduit for injecting into the intake conduit upstream of an air throttle valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
    • F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
    • F02D9/1035—Details of the valve housing
    • 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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/04—Injectors peculiar thereto
    • F02M69/042—Positioning of injectors with respect to engine, e.g. in the air intake conduit
    • F02M69/044—Positioning of injectors with respect to engine, e.g. in the air intake conduit for injecting into the intake conduit downstream of an air throttle valve
    • 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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
    • F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
    • 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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
    • F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
    • F02M69/465—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down of fuel rails

Definitions

  • the present invention relates to a fuel injection apparatus injecting and supplying fuel toward an internal combustion engine from a fuel injection valve attached to a throttle body, and more particular to a fuel supply pipe structure in a two fuel injection valve type throttle body in which a first fuel injection valve and a second fuel injection valve are attached to a single throttle body.
  • FIG. 2 A conventional fuel supply pipe structure in a throttle body provided with two fuel injection valves is disclosed in Fig. 2.
  • Reference numeral 30 denotes a throttle body in which an intake passage 31 is provided in an inner portion so as to laterally pass through.
  • the intake passage 31 is opened and closed by a throttle valve 33 attached to a throttle valve shaft 32, and an auxiliary throttle valve 34 is attached to an auxiliary throttle valve shaft 35 in an upstream side of the throttle valve 33 so as to open and close the intake passage 31.
  • the throttle valve 33 controls an amount of air flowing to an internal combustion engine (not shown), and the auxiliary throttle valve 34 controls an amount of air flowing to the throttle valve 33.
  • Reference symbol J1 denotes a first fuel injection valve injecting and supplying fuel into an intake passage 31a at a downstream side of the throttle valve 33.
  • the first fuel injection valve J1 bears a fuel supply region at a time when the internal combustion engine is under a low opening degree operation and under a middle opening degree operation.
  • a leading end J1a of the first fuel injection valve J1 is inserted to a first insertion hole 30a of the throttle body 30, a rear end J1b is inserted to a first fuel injection valve insertion hole 36a of a first fuel distribution pipe 36, and the first fuel injection valve J1 is pinched by the throttle body 30 and the first fuel distribution pipe 36 screwed to the throttle body 30 by a screw 41.
  • a longitudinal axis Z-Z of the first fuel injection valve J1 is arranged at a crossing angle (A degree) with respect to a longitudinal axis X-X of the intake passage 31.
  • Reference symbol J2 denotes a second fuel injection valve injecting and supplying the fuel into an intake passage 31b at an upstream side of the throttle valve 33.
  • the second fuel injection valve J2 bears a fuel supply region at a time when the internal combustion engine is under middle and high opening degree operations.
  • a longitudinal axis Y-Y of the second fuel injection valve J2 is arranged at a crossing angle B degree with respect to the longitudinal axis X-X of the intake passage 31.
  • a second fuel inflow path 37b connected to the second fuel injection valve insertion hole 37a is provided in an inner portion of the second fuel distribution pipe 37, and the second fuel inflow path 37b is connected to the fuel source such as the fuel pump (not shown) or the like by a second fuel piping 42.
  • the crossing angel A degree between the first fuel injection valve J1 and the intake passage 31 is formed at an acute angle in comparison with the crossing angle B degree between the second fuel injection valve J2 and the suction passage 31.
  • crossing angle A degree ⁇ crossing angle B degree is established.
  • the crossing angle a degree of the first fuel injection valve J1 is formed at the acute angle in comparison with the crossing angle B degree of the second fuel injection valve J2, for the purpose of supplying the fuel injected by the first fuel injection valve J1 to the engine along the air stream within the intake passage 31 in a parallel state as much as possible, at a time when the engine is under the low and middle opening degree operations.
  • the crossing angle B degree of the second fuel injection valve J2 is formed at an obtuse angle in comparison with the crossing angle A degree of the first fuel injection valve J1, for the purpose of preventing the second fuel injection valve J2 from protruding to a right side in the drawing so as to make the entire of the throttle body compact. Even if the crossing angle B degree of the second fuel injection valve J2 is made at the obtuse angle as mentioned above, the air stream flowing within the intake passage 31 is fast particularly at a time of the operation under the high opening degree of the throttle valve. Accordingly, the injected fuel can flow well along the air stream.
  • a part of the fuel boosted by the fuel pump is supplied to the first fuel injection valve J1 installed to the first fuel distribution pipe 36 via the first fuel piping 40, and the other part of the fuel boosted by the fuel pump is supplied to the second fuel injection valve J2 attached to the second fuel distribution pipe 37 via the second fuel piping 42.
  • the fuel pump is arranged within a fuel tank existing at a position away from the engine, or near the fuel tank, and the throttle body 30 is arranged near the internal combustion engine.
  • first and second fuel distribution pipes 36 and 37 are prepared as the fuel distribution piping, and they are independently screwed to the throttle body 30. In accordance with this structure, screwing work man-hours are increased.
  • a fuel supply pipe structure in a two fuel injection valve type throttle body comprising:
  • the single fuel distribution pipe is prepared, the first fuel injection valve is connected to the fuel distribution pipe via the fuel connection pipe, the second fuel injection valve is directly connected to the fuel distribution pipe, the fuel boosted by the fuel pump is supplied to the fuel distribution path of the fuel distribution pipe from the single fuel piping, a part of the fuel is supplied to the first fuel injection valve via the fuel connection pipe, and the other of the fuel is directly supplied to the second fuel injection valve.
  • the fuel distribution pipe is single, it is possible to largely improve a degree of freedom for arranging the fuel distribution pipe.
  • the fuel distribution pipe is connected to the fuel pump by the single fuel piping, it is possible to easily execute the arrangement of the fuel piping and the connecting work of the fuel piping, and it is possible to arrange the outer appearance neat.
  • Reference numeral 1 denotes a fuel distribution pipe.
  • the fuel distribution pipe 1 is formed as follows.
  • Reference symbol 1a denotes a fuel distribution path provided in an inner portion of the fuel distribution pipe 1.
  • the fuel distribution path 1a is connected to a fuel pump (not shown) by a fuel distribution piping 2, and a fuel boosted by the fuel pump is supplied into the fuel distribution path 1a via the fuel piping 2.
  • a second fuel injection valve insertion hole 1c is provided so as to be open at an end portion 1b (an upper end in Fig. 1) of the fuel distribution pipe 1, and another end is open to an inner side of the fuel distribution path 1a.
  • a longitudinal axis of the second fuel injection valve insertion hole 1c is formed concentrically to a longitudinal axis Y-Y of a second fuel injection valve J2.
  • connection hole 1d is provided so as to be open at the end portion 1b of the fuel distribution pipe 1, and the other end is open to an inner side of the fuel distribution path 1a.
  • connection hole 1d is formed in parallel to the longitudinal axis of the second fuel injection valve insertion hole 1c.
  • the second fuel injection valve insertion hole 1c and the connection hole 1d are provided in the single fuel distribution pipe 1 from the fuel distribution path 1a toward the one end 1b in parallel and along the longitudinal axis Y-Y of the second fuel injection valve J2.
  • Reference numeral 3 denotes a fuel connectionpipe.
  • a first fuel injection valve insertion hole 3b which is concentric to the longitudinal axis X-X of the first fuel injection valve J1, is provided so as to be open toward one end 3a in an upper side, and an insertion pipe portion 3d, which is inparallel to the longitudinal axis Y-Y of the second fuel injection valve J2 and is inserted into the connection hole 1d of the fuel distribution pipe 1, is formed toward another end 3c in a lower side thereof.
  • a connection flow path 3e is provided from a bottom portion of the first fuel injection valve insertion hole 3b toward the other end 3c of the fuel connection pipe 3.
  • a rear end portion J1b of the first fuel injection valve J1 is inserted into the first fuel injection valve insertion hole 3bof the fuel connection pipe 3.
  • the longitudinal axis Z-Z of the first fuel injection valve J1 is arranged at a crossing angle (A degree) with respect to the longitudinal axis X-X of the intake passage 30, a leading end portion J1a thereof is arranged so as to be inserted to a first insertion hole 30a of the throttle body 30, and the rear end portion J1b is arranged so as to be inserted to the first fuel injection valve insertion hole 3b of the fuel connection pipe 3.
  • a rear end portion J2b of the second fuel injection valve J2 is arranged so as to be inserted into the second fuel injection valve insertion hole 1c open at the end portion 1b of the fuel distribution pipe 1.
  • the longitudinal axis Y-Y of the second fuel injection valve J2 is arranged at a crossing angle (B degree) with respect to the longitudinal axis X-X of the intake passage 30, a leading end portion J2a thereof is arranged so as to be inserted to a second insertion hole 30b of the throttle body 30, and the rear end portion J2b is arranged so as to be inserted to the second fuel injection valve insertion hole 1c of the fuel distribution pipe 1.
  • the insertion pipe portion 3d of the fuel connection pipe 3 is arranged so as to be inserted into the connection hole 1d of the fuel distribution pipe 1.
  • a collar portion 1e extending in a side direction from the fuel distribution pipe 1 is screwed to the throttle body 30 by a screw 4.
  • the fuel distribution pipe 1 is screwed and fixed to the throttle body 30 by the screw 4, the first fuel injection valve J1 is pinched by the fuel distribution pipe 1, the fuel connection pipe 3 and the throttle body 30, and the second fuel injection valve J2 is pinched by the fuel distribution pipe 1 and the throttle body 30.
  • the fuel boosted by the fuel pump is supplied to the fuel distribution path 1a of the fuel distribution pipe 1, a part of the fuel within the fuel distribution path 1a is supplied to the second fuel injection valve J2 via the second fuel injection valve insertion hole 1c, and the other portion of the fuel within the fuel distribution path 1a is supplied to the first fuel injection valve J1 via connection hole 1d, the connection flow path 3e of the fuel connection pipe 3, and the first fuel injection valve insertion hole 3b.
  • the fuel distribution pipe 1 can be single, it is sufficient to prepare one fuel piping 2 for connecting the fuel distribution pipe 1 and the fuel pump by the flow path. Accordingly, it is possible to improve a degree of freedom for arranging the fuel piping 2 as well as it is possible to improve a connecting workability of the fuel piping 2. Further, it is possible to improve an outer appearance.
  • the mounting between the fuel piping 2 and the throttle body 30 can be finished by only one mounting work, it is possible to improve a mounting workability of the fuel piping 2.
  • the above structure in which the fuel distribution pipe 1 and the fuel piping 2 can be single, is particularly effective for a two-wheeled vehicle in which the throttle body 30 is arranged so as to be directly exposed to the atmospheric air and the accommodating space is limited narrow in comparison with the motor vehicle.
  • the present embodiment is employed for the single throttle body, however, can be easily applied to a multiple type throttle body in which a plurality of throttle bodies are arranged in a side direction.
  • the structure may be made such that a fuel distribution path, which is made long in a side direction along the multiple type throttle body, is provided in the single fuel distribution pipe 1, and the connection holes and the second fuel injection valve insertion holes are provided so as to be open toward the first and second fuel injection valves installed to the respective throttle bodies.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP20060124464 2005-12-26 2006-11-21 Dispositif d'alimentation en carburant pour deux soupapes d'injection d'un élément de papillon des gaz Expired - Fee Related EP1801412B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005372582A JP4616165B2 (ja) 2005-12-26 2005-12-26 ２燃料噴射弁型のスロットルボデーにおける燃料供給管構造

Publications (3)

Publication Number Publication Date
EP1801412A2 true EP1801412A2 (fr) 2007-06-27
EP1801412A3 EP1801412A3 (fr) 2008-02-13
EP1801412B1 EP1801412B1 (fr) 2009-05-13

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ID=37908139

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20060124464 Expired - Fee Related EP1801412B1 (fr) 2005-12-26 2006-11-21 Dispositif d'alimentation en carburant pour deux soupapes d'injection d'un élément de papillon des gaz

Country Status (3)

Country Link
EP (1) EP1801412B1 (fr)
JP (1) JP4616165B2 (fr)
DE (1) DE602006006783D1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5014227B2 (ja) * 2008-03-28 2012-08-29 本田技研工業株式会社 Ｖ型エンジンの燃料分配装置
JP5352567B2 (ja) 2009-11-10 2013-11-27 株式会社ミクニ 燃料噴射装置
JP5681420B2 (ja) * 2010-09-14 2015-03-11 株式会社ケーヒン エンジンの燃料噴射装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02259272A (ja) * 1989-03-30 1990-10-22 Nippondenso Co Ltd エンジンの燃料供給装置
JP2002317738A (ja) * 2001-04-18 2002-10-31 Honda Motor Co Ltd 内燃機関の燃料噴射装置
EP1387081A2 (fr) * 2002-07-30 2004-02-04 Yamaha Hatsudoki Kabushiki Kaisha Dispositif d'alimentation en carburant et motor de motocycle l'utilisant

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3747272B2 (ja) * 1998-11-06 2006-02-22 株式会社ケーヒン Ｖ型機関用燃料噴射装置における燃料噴射弁 取付け装置
JP2000220551A (ja) * 1999-02-01 2000-08-08 Keihin Corp 燃料噴射装置における燃料噴射弁の取付け装置
JP4342118B2 (ja) * 2001-03-30 2009-10-14 本田技研工業株式会社 多気筒内燃機関の吸気装置
JP2002295271A (ja) * 2001-03-30 2002-10-09 Honda Motor Co Ltd Ｖ型内燃機関の吸気装置
JP4341811B2 (ja) * 2003-04-04 2009-10-14 本田技研工業株式会社 スロットルバルブ開度制御装置
JP4074941B2 (ja) * 2004-02-09 2008-04-16 株式会社ケーヒン 燃料噴射弁の取付け構造
JP2005307866A (ja) * 2004-04-22 2005-11-04 Keihin Corp 多連スロットルボデーにおける燃料分配管
JP4511975B2 (ja) * 2005-03-02 2010-07-28 株式会社ケーヒン ２燃料噴射弁を備えるスロットルボデーにおける燃料供給管構造
JP4334493B2 (ja) * 2005-03-17 2009-09-30 株式会社ケーヒン ２燃料噴射弁を備える多連スロットルボデーにおける燃料供給管構造

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02259272A (ja) * 1989-03-30 1990-10-22 Nippondenso Co Ltd エンジンの燃料供給装置
JP2002317738A (ja) * 2001-04-18 2002-10-31 Honda Motor Co Ltd 内燃機関の燃料噴射装置
EP1387081A2 (fr) * 2002-07-30 2004-02-04 Yamaha Hatsudoki Kabushiki Kaisha Dispositif d'alimentation en carburant et motor de motocycle l'utilisant

Also Published As

Publication number Publication date
JP4616165B2 (ja) 2011-01-19
EP1801412A3 (fr) 2008-02-13
JP2007170349A (ja) 2007-07-05
EP1801412B1 (fr) 2009-05-13
DE602006006783D1 (de) 2009-06-25

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