JP2010084633A - Throttle body having fuel injection valve - Google Patents

Throttle body having fuel injection valve Download PDF

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Publication number
JP2010084633A
JP2010084633A JP2008254841A JP2008254841A JP2010084633A JP 2010084633 A JP2010084633 A JP 2010084633A JP 2008254841 A JP2008254841 A JP 2008254841A JP 2008254841 A JP2008254841 A JP 2008254841A JP 2010084633 A JP2010084633 A JP 2010084633A
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Prior art keywords
fuel injection
throttle body
pair
throttle
injection valve
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JP2008254841A
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Japanese (ja)
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Masahiro Chokai
正博 鳥海
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Keihin Corp
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Keihin Corp
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Priority to JP2008254841A priority Critical patent/JP2010084633A/en
Priority to EP09171587.0A priority patent/EP2169211B1/en
Publication of JP2010084633A publication Critical patent/JP2010084633A/en
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    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/104—Intake manifolds
    • F02M35/116—Intake manifolds for engines with cylinders in V-arrangement or arranged oppositely relative to the main shaft
    • 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
    • F02D9/109—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps having two or more flaps
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10006—Air intakes; Induction systems characterised by the position of elements of the air intake system in direction of the air intake flow, i.e. between ambient air inlet and supply to the combustion chamber
    • F02M35/10078—Connections of intake systems to the engine
    • F02M35/10085—Connections of intake systems to the engine having a connecting piece, e.g. a flange, between the engine and the air intake being foreseen with a throttle valve, fuel injector, mixture ducts or the like
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10091—Air intakes; Induction systems characterised by details of intake ducts: shapes; connections; arrangements
    • F02M35/10124—Ducts with special cross-sections, e.g. non-circular cross-section
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/1015—Air intakes; Induction systems characterised by the engine type
    • F02M35/10177—Engines having multiple fuel injectors or carburettors per cylinder
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10209—Fluid connections to the air intake system; their arrangement of pipes, valves or the like
    • F02M35/10216—Fuel injectors; Fuel pipes or rails; Fuel pumps or pressure regulators
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/104—Intake manifolds
    • F02M35/108—Intake manifolds with primary and secondary intake passages
    • F02M35/1085—Intake manifolds with primary and secondary intake passages the combustion chamber having multiple intake valves
    • 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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To easily attach a pair of fuel injection valves arranged in parallel to each other by securing a wide attachment space in the sidewall of a throttle body, and cause the fuel injection valves to inject fuel in adequate directions to the respective pair of intake passages. <P>SOLUTION: In this throttle body T1 having fuel injection valves, the intake passage 17 is formed to have a transverse cross-section thereof in an oblong circle having a long diameter L extending in a direction in which a pair of branched paths 8a, 8a, which are formed in downstream parts of the intake port 8 of an engine E, are arranged, and a short diameter S extending orthogonal to the long diameter L; and the pair of fuel injection valves 28, 28 are attached to a sidewall, extending along the long diameter L, of the throttle body T1 so as to be arranged along the long diameter L, and to be allowed to inject fuel toward the pair of branched paths 8a, 8a, respectively. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は，吸気ポートの下流側を一対の分岐路に形成したエンジンに取り付けられ，前記吸気ポートの上流端に連なる吸気道を有するスロットルボディに，その吸気道を開閉するスロットル弁を軸支すると共に，このスロットル弁の下流側から前記吸気ポートに向かって燃料を噴射する燃料噴射弁を装着した，燃料噴射弁付きスロットルボディの改良に関する。   The present invention is attached to an engine having a pair of branch passages on the downstream side of an intake port, and a throttle body having an intake passage connected to the upstream end of the intake port supports a throttle valve for opening and closing the intake passage. In addition, the present invention relates to an improvement of a throttle body with a fuel injection valve equipped with a fuel injection valve for injecting fuel from the downstream side of the throttle valve toward the intake port.

従来，かゝる燃料噴射弁付きスロットルボディにおいて，スロットルボディに装着される単一の燃料噴射弁を，その燃料噴射時，吸気ポートの一対の分岐路に向かう２方向の燃料噴霧フォームが形成されるようにしたものが下記特許文献１に記載されているように既に知られている。しかしながら，単一の燃料噴射弁をもって２方向の燃料噴霧フォームを形成し，これらを２本の分岐路に正確に指向させることには，燃料噴孔に高い加工技術が要求され，コスト高となる傾向がある。しかも，単一の燃料噴射弁であるため，その燃料噴射量に或る限界があり，大排気量エンジンへの適用が容易でない。   Conventionally, in such a throttle body with a fuel injection valve, a single fuel injection valve mounted on the throttle body is formed with a two-way fuel spray foam toward the pair of branch paths of the intake port at the time of fuel injection. Such a device is already known as described in Patent Document 1 below. However, in order to form two-way fuel spray foam with a single fuel injection valve and to direct these to two branch paths accurately, high processing technology is required for the fuel injection hole, resulting in high costs. Tend. Moreover, since it is a single fuel injection valve, there is a certain limit in the amount of fuel injection, and it is not easy to apply to a large displacement engine.

また，スロットルボディに，並列する一対の燃料噴射弁を装着して，大排気量エンジンに対応し得るよう，多量の燃料噴射を可能する燃料噴射弁付きスロットルボディが下記特許文献２に開示されるように，既に知られている。しかしながら，そのものは，スロットルボディの吸気道断面が真円をなしているため，スロットルボディの一側壁に，並列する２本の燃料噴射弁を装着する取り付けスペースを確保することが困難であり，このため，２本の燃料噴射弁の燃料噴射方向を所定の２方向に指向させることが難しい。
特許第４０５３０４８号公報 特許第３７２４１８４号公報 Patent Document 2 below discloses a throttle body with a fuel injection valve capable of injecting a large amount of fuel so that the throttle body can be equipped with a pair of fuel injection valves arranged in parallel to support a large displacement engine. As is already known. However, since the cross section of the intake passage of the throttle body is a perfect circle, it is difficult to secure a mounting space for mounting two parallel fuel injection valves on one side wall of the throttle body. For this reason, it is difficult to direct the fuel injection directions of the two fuel injection valves in two predetermined directions.
Japanese Patent No. 4053048 Japanese Patent No. 3724184

本発明は，かゝる事情に鑑みてなされたもので，スロットルボディの側壁に広い取り付けスペースを確保して，並列する一対の燃料噴射弁を容易に装着することを可能にし，しかも，これら燃料噴射弁の燃料噴射方向を一対の吸気通路に的確に指向させ得るようにした燃料噴射弁付きスロットルボディを提供することを目的とする。   The present invention has been made in view of such circumstances, and it is possible to secure a wide mounting space on the side wall of the throttle body and to easily mount a pair of parallel fuel injection valves. It is an object of the present invention to provide a fuel injection valve-equipped throttle body capable of accurately directing the fuel injection direction of an injection valve to a pair of intake passages.

上記目的を達成するために，本発明は，吸気ポートの下流側を一対の分岐路に形成したエンジンに取り付けられ，前記吸気ポートの上流端に連なる吸気道を有するスロットルボディに，その吸気道を開閉するスロットル弁を軸支すると共に，このスロットル弁の下流側から前記吸気ポートに向かって燃料を噴射する燃料噴射弁を装着した，燃料噴射弁付きスロットルボディにおいて，前記吸気道を，その横断面が前記一対の分岐路の配列方向に沿う径を長径とし，その長径と直交する径を短径とする長円形となるように形成し，前記スロットルボディの前記長径に沿う一側壁に，前記長径に沿って並んで前記一対の分岐路に向かってそれぞれ燃料を噴射し得るよう一対の燃料噴射弁を装着したことを第１の特徴とする。   In order to achieve the above object, the present invention attaches an intake passage to a throttle body having an intake passage connected to an upstream end of the intake port, which is attached to an engine in which the downstream side of the intake port is formed as a pair of branch passages. A throttle body with a fuel injection valve equipped with a fuel injection valve that pivotally supports a throttle valve that opens and closes and that injects fuel from the downstream side of the throttle valve toward the intake port. Is formed into an oval having a major axis having a diameter along the arrangement direction of the pair of branch paths and a minor axis being a diameter orthogonal to the major axis, and the major axis is formed on one side wall along the major axis of the throttle body. A first feature is that a pair of fuel injection valves are mounted so as to be able to inject fuel in parallel to each other toward the pair of branch paths.

尚，前記長円とは，楕円や小判形などを含むもので，複数の円弧の組み合わせ，又は複数の円弧及び直線の組み合わせからなる偏平化した円をいう。   The ellipse includes an ellipse, an oval, etc., and is a flattened circle composed of a combination of a plurality of arcs or a combination of a plurality of arcs and straight lines.

また，本発明は，第１の特徴に加えて，前記長円形を，前記短径方向に延びて相対向する一対の短円弧と，これら短円弧より長く前記長径方向に延びて相対向する一対の長円弧又は直線とを組み合わせて構成し，前記スロットルボディには，それを前記長径に沿って貫通する弁軸に，前記長円形と同様な輪郭を持つ前記スロットル弁を取り付けたことを第２の特徴とする。   In addition to the first feature, the present invention provides a pair of short arcs extending in the minor axis direction and facing each other and a pair of opposing arcs extending in the major axis direction longer than these short arcs. And a throttle valve having a contour similar to that of the oval is attached to the throttle body through a valve shaft that penetrates the throttle body along the major axis. It is characterized by.

さらに，本発明は，第１又は第２の特徴に加えて，Ｖ型エンジンの第１及び第２バンクの，両バンク間の谷部に臨む各側壁に一対の前記スロットルボディをそれぞれ取り付け，各スロットルボディを，その吸気道の前記短径が第１及び第２バンクの配列方向に向くように配置したことを第３の特徴とする。   Furthermore, in addition to the first or second feature, the present invention attaches a pair of the throttle bodies to each side wall of the first and second banks of the V-type engine facing the valley between the two banks. A third feature is that the throttle body is disposed so that the minor axis of the intake passage faces the arrangement direction of the first and second banks.

本発明の第１の特徴によれば，スロットルボディの各吸気道の横断面を，吸気ポートの分岐路の配列方向に沿う径を長径とし，その長径と直交する径を短径とする長円形とすることで，吸気道の流路面積を大きく確保することができる。   According to the first feature of the present invention, the cross section of each intake passage of the throttle body is an oval having a major axis that is the diameter along the arrangement direction of the branch passages of the intake port and a minor axis that is perpendicular to the major axis. By doing so, a large passage area of the intake passage can be secured.

しかも，スロットルボディの長径に沿う側壁は，同一流路面積の真円スロットルボディに比して広い取り付けスペースを持つことができ，その一側壁に，長径に沿って並ぶ一対の燃料噴射弁が装着されるので，両燃料噴射弁を，分岐路の間隔に対応させて自由に配置することが可能となり，したがって，両燃料噴射弁の噴射燃料により形成される円錐状の噴霧フォームを分岐路に的確に指向させ，吸気ポート内壁への噴射燃料の付着を極力少なくすることができ，燃費及び排気エミッションの低減に寄与し得る。そして，一方の燃料噴射弁のみを作動したり，両方の燃料噴射弁を同時に作動したりすることにより，総合燃料噴射量を小流量から大流量まで，きめ細かく制御することができ，吸気道の流路面積を大きく確保し得ることゝ相まって，大排気量エンジンに有効に適用し得る。   Moreover, the side wall along the major axis of the throttle body can have a larger mounting space than a perfect throttle body with the same flow path area, and a pair of fuel injection valves lined up along the major axis are mounted on one side wall. Therefore, both fuel injection valves can be freely arranged according to the distance between the branch passages, and therefore, the conical spray foam formed by the fuel injected from both fuel injection valves can be accurately placed in the branch passage. Therefore, the adhesion of the injected fuel to the inner wall of the intake port can be reduced as much as possible, which can contribute to reduction of fuel consumption and exhaust emission. By operating only one fuel injection valve or by operating both fuel injection valves simultaneously, the total fuel injection amount can be finely controlled from a small flow rate to a large flow rate. Combined with the fact that a large road area can be secured, it can be effectively applied to a large displacement engine.

本発明の第２の特徴によれば，吸気道及びスロットル弁の，短径方向に延びる輪郭が短円弧で形成されるので，スロットル弁を閉じ位置から僅かでも開くと，スロットル弁の短径方向に沿う端面と，それに対向する吸気道内側面との間に隙間が発生することになり，これによりスロットル弁の上記端面と吸気道内側面との摩擦を防ぎ，スロットル弁をスムーズに開閉することができる。   According to the second feature of the present invention, since the contour extending in the minor axis direction of the intake passage and the throttle valve is formed by a short arc, if the throttle valve is opened slightly from the closed position, the minor axis direction of the throttle valve A gap is generated between the end surface along the intake passage and the inner surface of the intake passage opposite to the end surface, thereby preventing friction between the end surface of the throttle valve and the inner surface of the intake passage and opening and closing the throttle valve smoothly. .

本発明の第３の特徴によれば，Ｖ型エンジンの第１及び第２バンク間の谷部に配置される第１及び第２スロットルボディは，両バンクの配列方向に偏平化されることになって，互いに干渉し合うことなく狭い谷部に容易に配置することができる。   According to the third feature of the present invention, the first and second throttle bodies arranged in the valleys between the first and second banks of the V-type engine are flattened in the arrangement direction of both banks. Thus, they can be easily arranged in narrow valleys without interfering with each other.

本発明の実施の形態を，添付図面に示す本発明の好適な実施例に基づいて以下に説明する。   Embodiments of the present invention will be described below on the basis of preferred embodiments of the present invention shown in the accompanying drawings.

図１は本発明の第１実施例に係る燃料噴射弁付きスロットルボディを備える車両用Ｖ型エンジンの側面図，図２は図１の２部拡大断面図，図３は図２の３−３線断面図，図４は図２の４−４線断面図，図５は本発明の第２実施例を示す，図２との対応図である。   FIG. 1 is a side view of a V-type engine for a vehicle including a throttle body with a fuel injection valve according to a first embodiment of the present invention, FIG. 2 is an enlarged sectional view of a portion 2 in FIG. 1, and FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. 2, and FIG. 5 is a view corresponding to FIG. 2, showing a second embodiment of the present invention.

先ず，図１において，自動車，自動二輪車等の車体に搭載されるエンジンＥは，クランク軸１を支持するクランク支持部２から上方へＶ字状に突出する第１バンクＢ１及び第２バンクＢ２を備えてＶ型に構成される。各バンクＢ１，Ｂ２は，クランク支持部２に連結したシリンダブロック３と，このシリンダブロック３の上端に接合されるシリンダヘッド４とからなっており，シリンダブロック３は，ピストン５が往復動するシリンダボア６を有し，シリンダヘッド４は，シリンダボア６に連なる燃焼室７と，この燃焼室７に開口する吸気ポート８及び排気ポート９とを有する。   First, in FIG. 1, an engine E mounted on a vehicle body such as an automobile or a motorcycle has a first bank B1 and a second bank B2 that protrude upward in a V shape from a crank support portion 2 that supports the crankshaft 1. It is provided and is configured in a V shape. Each of the banks B1 and B2 includes a cylinder block 3 connected to the crank support 2 and a cylinder head 4 joined to the upper end of the cylinder block 3. The cylinder block 3 is a cylinder bore in which the piston 5 reciprocates. 6, the cylinder head 4 includes a combustion chamber 7 connected to the cylinder bore 6, and an intake port 8 and an exhaust port 9 that open to the combustion chamber 7.

図３に示すように，上記吸気ポート８は，長手方向中間部から燃焼室７に向かってクランク軸１の軸方向に二股状に分岐する分岐路８ａ，８ａを有しており，これら分岐路８ａ，８ａを開閉する一対の吸気弁１０，１０がシリンダヘッド４に装着される。排気ポート９も同様の二股構造を有しており，それを開閉する一対の排気弁１１，１１（図１にはその一方のみ示す。）もシリンダヘッド４に装着される。   As shown in FIG. 3, the intake port 8 has branch paths 8 a and 8 a that bifurcate in the axial direction of the crankshaft 1 from the longitudinal intermediate portion toward the combustion chamber 7. A pair of intake valves 10, 10 that open and close 8 a, 8 a are attached to the cylinder head 4. The exhaust port 9 has a similar bifurcated structure, and a pair of exhaust valves 11 and 11 (only one of which is shown in FIG. 1) for opening and closing the exhaust port 9 is also mounted on the cylinder head 4.

再び図１において，両バンクＢ１，Ｂ２の吸気ポート８，８の上流端は，両バンクＢ１，Ｂ２間の谷部１５に向かって開口しており，それら吸気ポート８，８の上流端に吸気道１７，１７を連ねる第１及び第２スロットルボディＴ１，Ｔ２が第１及び第２バンクＢ１，Ｂ２に筒状のインシュレータ１６，１６を介して取り付けられる。こうして，第１及び第２スロットルボディＴ１，Ｔ２は前記谷部１５に対称的に配置される。   In FIG. 1 again, the upstream ends of the intake ports 8 and 8 of both banks B1 and B2 are open toward the valley 15 between the banks B1 and B2, and the intake ends of the intake ports 8 and 8 are intake air. First and second throttle bodies T1 and T2 connecting the roads 17 and 17 are attached to the first and second banks B1 and B2 through cylindrical insulators 16 and 16, respectively. Thus, the first and second throttle bodies T1, T2 are disposed symmetrically in the valley portion 15.

第１及び第２スロットルボディＴ１，Ｔ２は，基本的に構造が同一であるので，それらを代表して第１スロットルボディＴ１につき，図２〜図４を参照しながら説明する。以下，第１スロットルボディＴ１を単にスロットルボディＴ１という。   Since the first and second throttle bodies T1 and T2 have basically the same structure, the first throttle body T1 will be described as a representative with reference to FIGS. Hereinafter, the first throttle body T1 is simply referred to as the throttle body T1.

図４に明示するように，スロットルボディＴ１の，吸気ポート８に連なる吸気道１７の横断面は，吸気ポート８の一対の分岐路８ａ，８ａの配列方向に沿う径を長径Ｌとし，その長径Ｌと直交する径を短径Ｓとする長円形をなしている。   As clearly shown in FIG. 4, in the cross section of the intake passage 17 connected to the intake port 8 of the throttle body T1, the diameter along the arrangement direction of the pair of branch paths 8a, 8a of the intake port 8 is a long diameter L, and the long diameter An oblong shape having a short axis S as a diameter perpendicular to L is formed.

図示例の長円は，基本的には，短径Ｓに沿って延びて相対向する一対の短円弧２０，２０と，長径Ｌに沿って延びて相対向する，上記短円弧２０，２０より長い一対の長円弧２１，２１とを組み合わせてなっており，短円弧２０と長円弧２１とが交差する角部には丸みが付される。   The ellipse in the illustrated example basically includes a pair of short arcs 20 and 20 that extend along the minor axis S and face each other, and the short arcs 20 and 20 that extend along the major axis L and face each other. A pair of long arcs 21 and 21 are combined, and the corner where the short arc 20 and the long arc 21 intersect is rounded.

図２〜図４において，スロットルボディＴ１には，その長手方向中間部を長径Ｌに沿って貫通する弁軸２３が回転自在に支承され，この弁軸２３に，その回転により吸気道１７を開閉するバタフライ型のスロットル弁２４が固着される。このスロットル弁２４は，その閉鎖位置で吸気道１７の内周面に密接するよう，吸気道１７の横断面形状と同様な長円形の輪郭を有する。   2 to 4, the throttle body T1 is rotatably supported by a valve shaft 23 penetrating the longitudinal intermediate portion along the long diameter L. The valve shaft 23 opens and closes the intake passage 17 by its rotation. A butterfly type throttle valve 24 is fixed. The throttle valve 24 has an oval outline similar to the cross-sectional shape of the intake passage 17 so as to be in close contact with the inner peripheral surface of the intake passage 17 at the closed position.

また，スロットルボディＴ１の長径Ｌに沿う一側壁，特に前記谷部１５の中央寄り側壁には，一対の装着ボス２５，２５が長径Ｌに沿って並ぶように，換言すれば前記分岐路８ａ，８ａの配列方向に沿って並ぶように一体に形成される。これら装着ボス２５，２５に一対の電磁式燃料噴射弁２８，２８がシール部材３２を介して嵌装され，これら燃料噴射弁２８，２８の外端部に，これらに燃料を供給し得る共通の燃料ジョイント３４が嵌装される。この燃料ジョイント３４は支持腕３４ａを備えており，この支持腕３４ａが，スロットルボディＴ１の一側壁に形成される取り付けボス２６にボルト３５で固着されることにより，燃料ジョイント３４がスロットルボディＴ１に固定されると共に，この燃料ジョイント３４により一対の燃料噴射弁２８，２８が保持される。各燃料噴射弁２８は，その一側方に突出する給電用のカプラ２８ａを備えており，このカプラ２８ａの根元を挟んで燃料噴射弁２８の回転を阻止する位置決めフォーク３４ｂが燃料ジョイント３４に形成される。こうして，一対の燃料噴射弁２８，２８は，それぞれの噴射燃料により形成される円錐状の噴霧フォーム２９，２９が前記分岐路８ａ，８ａを指向するように配置される。   Further, a pair of mounting bosses 25, 25 are arranged along the major axis L on one side wall along the major axis L of the throttle body T1, particularly the central side wall of the valley portion 15, in other words, the branch path 8a, They are integrally formed so as to be aligned along the arrangement direction of 8a. A pair of electromagnetic fuel injection valves 28, 28 are fitted to the mounting bosses 25, 25 via a seal member 32, and a common fuel can be supplied to the outer ends of the fuel injection valves 28, 28. A fuel joint 34 is fitted. The fuel joint 34 includes a support arm 34a. The support arm 34a is fixed to a mounting boss 26 formed on one side wall of the throttle body T1 with a bolt 35, so that the fuel joint 34 is attached to the throttle body T1. In addition to being fixed, the fuel joint 34 holds the pair of fuel injection valves 28, 28. Each fuel injection valve 28 is provided with a power supply coupler 28a protruding to one side of the fuel injection valve 28, and a positioning fork 34b for preventing the rotation of the fuel injection valve 28 across the base of the coupler 28a is formed in the fuel joint 34. Is done. Thus, the pair of fuel injection valves 28, 28 are arranged such that the conical spray foams 29, 29 formed by the respective injected fuels are directed to the branch paths 8a, 8a.

再び，図１において，第１及び第２バンクＢ１，Ｂ２に，その間の谷部１５で取り付けられる第１及び第２スロットルボディＴ１，Ｔ２は，その吸気道１７の短径Ｓが第１及び第２バンクＢ１，Ｂ２の配列方向に向くように配置される。そして，第１及び第２スロットルボディＴ１，Ｔ２の燃料ジョイント３４，３４には，燃料ポンプ（図示せず。）からの燃料を燃料供給管３１を通して供給される燃料分配ブロック３０が接続される。   Referring again to FIG. 1, the first and second throttle bodies T1, T2 attached to the first and second banks B1, B2 at the valleys 15 therebetween have the short diameter S of the intake passage 17 of the first and second banks. The two banks B1 and B2 are arranged so as to face the arrangement direction. A fuel distribution block 30 to which fuel from a fuel pump (not shown) is supplied through a fuel supply pipe 31 is connected to the fuel joints 34, 34 of the first and second throttle bodies T1, T2.

次に，この実施例の作用について説明する。   Next, the operation of this embodiment will be described.

第１及び第２スロットルボディＴ１，Ｔ２の各吸気道１７の横断面は，吸気ポート８の分岐路８ａ，８ａの配列方向に沿う径を長径Ｌとし，その長径Ｌと直交する径を短径Ｓとする長円形をなしているから，吸気道１７の流路面積を大きく確保することができる。   In the cross section of each intake passage 17 of the first and second throttle bodies T1, T2, the diameter along the arrangement direction of the branch paths 8a, 8a of the intake port 8 is the long diameter L, and the diameter orthogonal to the long diameter L is the short diameter. Since an oval shape of S is formed, a large passage area of the intake passage 17 can be secured.

しかも，各スロットルボディＴ１，Ｔ２の長径Ｌに沿う側壁は，同一流路面積の真円スロットルボディに比して広い取り付けスペースを持つことができ，その一側壁に，長径Ｌに沿って並ぶ一対の燃料噴射弁２８，２８が装着されるので，両燃料噴射弁２８，２８を，分岐路８ａ，８ａの間隔に対応させて自由に配置することが可能となり，したがって，両燃料噴射弁２８，２８の噴射燃料により形成される円錐状の噴霧フォーム２９，２９を分岐路８ａ，８ａに的確に指向させ，吸気ポート８内壁への噴射燃料の付着を極力少なくすることができ，燃費及び排気エミッションの低減に寄与し得る。   In addition, the side walls along the major axis L of each throttle body T1, T2 can have a larger mounting space compared to a perfect throttle body having the same flow path area, and a pair of side by side along the major axis L is arranged on one side wall. Since the fuel injection valves 28, 28 are mounted, both the fuel injection valves 28, 28 can be freely arranged according to the distance between the branch paths 8a, 8a. The conical spray foams 29, 29 formed by the 28 injected fuels can be accurately directed to the branch passages 8a, 8a, and the adhesion of the injected fuel to the inner wall of the intake port 8 can be reduced as much as possible. It can contribute to the reduction of.

そして，一方の燃料噴射弁２８のみを作動したり，両方の燃料噴射弁２８，２８を同時に作動したりすることにより，総合燃料噴射量を小流量から大流量まで，きめ細かく制御することができ，吸気道１７の流路面積を大きく確保し得ることゝ相まって，大排気量エンジンに有効に適用し得る。   Then, by operating only one fuel injection valve 28 or by operating both fuel injection valves 28 and 28 simultaneously, the total fuel injection amount can be finely controlled from a small flow rate to a large flow rate. Combined with the fact that a large flow passage area of the intake passage 17 can be secured, it can be effectively applied to a large displacement engine.

また，吸気道１７及びスロットル弁２４の，短径Ｓ方向に延びる輪郭が短円弧２０で形成されるので，スロットル弁２４を閉じ位置から僅かでも開くと，スロットル弁２４の短径Ｓ方向に沿う端面と，それに対向する吸気道１７内側面との間に隙間が発生することになり，これによりスロットル弁２４の上記端面と吸気道１７内側面との摩擦を防ぎ，スロットル弁２４をスムーズに開閉することができる。   Further, since the outline extending in the minor axis S direction of the intake passage 17 and the throttle valve 24 is formed by the short arc 20, when the throttle valve 24 is slightly opened from the closed position, it follows the minor axis S direction of the throttle valve 24. A gap is generated between the end surface and the inner surface of the intake passage 17 facing the end surface, thereby preventing friction between the end surface of the throttle valve 24 and the inner surface of the intake passage 17 and opening and closing the throttle valve 24 smoothly. can do.

さらに，Ｖ型エンジンＥの第１及び第２バンクＢ１，Ｂ２間の谷部１５に配置される第１及び第２スロットルボディＴ１，Ｔ２は，それぞれの吸気道１７の短径Ｓが第１及び第２バンクＢ１，Ｂ２の配列方向に向くように配置されるので，第１及び第２スロットルボディＴ１，Ｔ２は，両バンクＢ１，Ｂ２の配列方向に偏平化されることになって，互いに干渉し合うことなく狭い谷部１５に容易に配置することができる。   Further, the first and second throttle bodies T1 and T2 disposed in the valley portion 15 between the first and second banks B1 and B2 of the V-type engine E have the short diameter S of the respective intake passages 17 as the first and second banks. Since the first and second throttle bodies T1 and T2 are arranged in the arrangement direction of the second banks B1 and B2, the first and second throttle bodies T1 and T2 are flattened in the arrangement direction of the two banks B1 and B2, thereby interfering with each other. It can arrange | position easily in the narrow valley part 15 without mutually.

次に，図５に示す本発明の第２実施例について説明する。   Next, a second embodiment of the present invention shown in FIG. 5 will be described.

この第２実施例は，第１及び第２スロットルボディＴ１，Ｔ２の吸気道１７の横断面の長円形を，短径Ｓ方向に延びて相対向する一対の短円弧２０，２０と，これら短円弧２０，２０より長く長径Ｌ方向に延びて相対向する一対の直線２１′，２１′とを組み合わせて構成した点を除けば，前記実施例と同様の構成であり，図５中，前実施例と対応する部分には同一の参照符号を付して，重複する説明を省略する。この第２実施例によれば，前記実施例と同様の作用効果を得ることができる。   In this second embodiment, an oval in the cross section of the intake passage 17 of the first and second throttle bodies T1, T2 is formed by a pair of short arcs 20, 20 extending in the minor axis S direction and facing each other. Except for the point that the arcs 20 and 20 are combined in combination with a pair of straight lines 21 ′ and 21 ′ that extend in the long-diameter L direction and oppose each other, the configuration is the same as that of the above embodiment. Parts corresponding to the examples are denoted by the same reference numerals, and redundant description is omitted. According to the second embodiment, it is possible to obtain the same function and effect as the above-described embodiment.

本発明は上記実施例に限定されるものではなく，その要旨を逸脱しない範囲で種々の設計変更が可能である。例えば，各スロットルボディＴ１，Ｔ２において，一対の燃料噴射弁２８，２８は，一対の分岐路８ａ，８ａの配置や形状に応じて，図示例のように互いに平行に配置したり，或いは互いに傾斜して配置することは自由である。   The present invention is not limited to the above embodiment, and various design changes can be made without departing from the scope of the invention. For example, in each throttle body T1, T2, the pair of fuel injection valves 28, 28 are arranged in parallel with each other as shown in the figure, or inclined with respect to each other, depending on the arrangement and shape of the pair of branch paths 8a, 8a. It is free to arrange.

本発明の第１実施例に係る燃料噴射弁付きスロットルボディを備える車両用Ｖ型エンジンの側面図。1 is a side view of a vehicular V-type engine including a throttle body with a fuel injection valve according to a first embodiment of the present invention. 図１の２部拡大断面図。FIG. 2 is an enlarged sectional view of a part 2 in FIG. 1. 図２の３−３線断面図。FIG. 3 is a sectional view taken along line 3-3 in FIG. 2. 図２の４−４線断面図。FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. 本発明の第２実施例を示す，図２との対応図。FIG. 3 is a view corresponding to FIG. 2 showing a second embodiment of the present invention.

符号の説明Explanation of symbols

Ｂ１・・・・第１バンク
Ｂ２・・・・第２バンク
Ｅ・・・・・エンジン
Ｌ・・・・・長径
Ｓ・・・・・短径
Ｔ１，Ｔ２・・・・スロットルボディ（第１，第２スロットルボディ）
８・・・・・吸気ポート
８ａ・・・・分岐路
１５・・・・谷部
１７・・・・吸気道
２３・・・・弁軸
２４・・・・スロットル弁
２８・・・・燃料噴射弁 B1... First bank B2 ... Second bank E ... Engine L ... Long diameter S ... Short diameter T1, T2 ... ... Throttle body (first , 2nd throttle body)
8. Intake port 8a ... Branch 15 ... Valley 17 ... Intake passage 23 ... Valve shaft 24 ... Throttle valve 28 ... Fuel injection valve

Claims (3)

吸気ポート（８）の下流側を一対の分岐路（８ａ，８ａ）に形成したエンジン（Ｅ）に取り付けられ，前記吸気ポート（８）の上流端に連なる吸気道（１７）を有するスロットルボディ（Ｔ１，Ｔ２）に，その吸気道（１７）を開閉するスロットル弁（２４）を軸支すると共に，このスロットル弁（２４）の下流側から前記吸気ポート（８）に向かって燃料を噴射する燃料噴射弁（２８）を装着した，燃料噴射弁付きスロットルボディにおいて，
前記吸気道（１７）を，その横断面が前記一対の分岐路（８ａ，８ａ）の配列方向に沿う径を長径（Ｌ）とし，その長径（Ｌ）と直交する径を短径（Ｓ）とする長円形となるように形成し，前記スロットルボディ（Ｔ１，Ｔ２）の前記長径（Ｌ）に沿う一側壁に，前記長径（Ｌ）に沿って並んで前記一対の分岐路（８ａ，８ａ）に向かってそれぞれ燃料を噴射し得るよう一対の燃料噴射弁（２８，２８）を装着したことを特徴とする，燃料噴射弁付きスロットルボディ。 A throttle body (17) attached to an engine (E) formed on a pair of branch passages (8a, 8a) on the downstream side of the intake port (8) and having an intake passage (17) connected to the upstream end of the intake port (8) A fuel that injects fuel from the downstream side of the throttle valve (24) toward the intake port (8) while pivotally supporting a throttle valve (24) for opening and closing the intake passage (17) at T1, T2) In a throttle body with a fuel injection valve equipped with an injection valve (28),
The diameter of the intake passage (17) along the arrangement direction of the pair of branch passages (8a, 8a) is defined as a major axis (L), and a diameter orthogonal to the major axis (L) is defined as a minor axis (S). The throttle body (T1, T2) is formed on the side wall along the major axis (L), and is arranged along the major axis (L) on the side wall along the major axis (L). A throttle body with a fuel injection valve, which is equipped with a pair of fuel injection valves (28, 28) so that fuel can be injected respectively toward 請求項１記載の燃料噴射弁付きスロットルボディにおいて，
前記長円形を，前記短径（Ｓ）方向に延びて相対向する一対の短円弧（２０，２０）と，これら短円弧（２０，２０）より長く前記長径（Ｌ）方向に延びて相対向する一対の長円弧（２１，２１）又は直線（２１′，２１′）とを組み合わせて構成し，前記スロットルボディ（Ｔ１，Ｔ２には，それを前記長径（Ｌ）に沿って貫通する弁軸（２３）に，前記長円形と同様な輪郭を持つ前記スロットル弁（２４）を取り付けたことを特徴とする，燃料噴射弁付きスロットルボディ。 The throttle body with a fuel injection valve according to claim 1,
A pair of short arcs (20, 20) extending in the minor axis (S) direction and facing each other, and longer than the short arcs (20, 20), extending in the major axis (L) direction, are opposed to each other. And a pair of long circular arcs (21, 21) or straight lines (21 ', 21'), and the throttle body (T1, T2 has a valve shaft penetrating along the long diameter (L). (23) A throttle body with a fuel injection valve, wherein the throttle valve (24) having the same outline as the oval is attached. 請求項１又は２記載の燃料噴射弁付きスロットルボディにおいて，
Ｖ型エンジン（Ｅ）の第１及び第２バンク（Ｂ１，Ｂ２）の，両バンク（Ｂ１，Ｂ２）間の谷部（１５）に臨む各側壁に一対の前記スロットルボディ（Ｔ１，Ｔ２）をそれぞれ取り付け，各スロットルボディ（Ｔ１，Ｔ２）を，その吸気道（１７）の前記短径（Ｓ）が第１及び第２バンク（Ｂ１，Ｂ２）の配列方向に向くように配置したことを特徴とする，燃料噴射弁付きスロットルボディ。 The throttle body with a fuel injection valve according to claim 1 or 2,
A pair of throttle bodies (T1, T2) is provided on each side wall of the V-type engine (E) facing the valley (15) between the banks (B1, B2) of the first and second banks (B1, B2). Each of the throttle bodies (T1, T2) is mounted and arranged such that the short diameter (S) of the intake passage (17) faces the arrangement direction of the first and second banks (B1, B2). A throttle body with a fuel injection valve.
JP2008254841A 2008-09-30 2008-09-30 Throttle body having fuel injection valve Pending JP2010084633A (en)

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CN216811991U (en) * 2022-01-14 2022-06-24 上海峰飞航空科技有限公司 Engine and aircraft and air throttle thereof

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61261465A (en) 1985-05-16 1986-11-19 Natl Res Inst For Metals Manufacture of compound superconductor
JPH0415937Y2 (en) * 1985-10-14 1992-04-09
JPS62206268A (en) * 1986-03-05 1987-09-10 Hitachi Ltd Fuel injection device for internal combustion engine
JPH04128567A (en) * 1990-09-20 1992-04-30 Mazda Motor Corp Intake device for engine
EP0500139B1 (en) * 1991-02-22 1997-01-29 Yamaha Hatsudoki Kabushiki Kaisha Induction system for a multiple valve internal combustion engine
JP2591384B2 (en) * 1991-10-07 1997-03-19 三菱自動車工業株式会社 Engine intake system structure
JP3107489B2 (en) * 1993-11-08 2000-11-06 株式会社日立製作所 Air-fuel mixture forming device for internal combustion engine
JPH0914104A (en) * 1995-06-26 1997-01-14 Yamaha Motor Co Ltd Fuel supply device for internal combustion engine
JP3724184B2 (en) 1998-04-15 2005-12-07 スズキ株式会社 Fuel injection device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013204537A (en) * 2012-03-29 2013-10-07 Kubota Corp Spark-ignition engine
JP2013204539A (en) * 2012-03-29 2013-10-07 Kubota Corp Spark-ignition engine
JP2016079835A (en) * 2014-10-14 2016-05-16 ダイハツ工業株式会社 Injector unit internal combustion engine
JPWO2021181547A1 (en) * 2020-03-11 2021-09-16
WO2021181547A1 (en) * 2020-03-11 2021-09-16 本田技研工業株式会社 Intake device of internal combustion engine for saddle-type vehicle

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