JP4970347B2 - Throttle body arrangement structure for general-purpose V-type engine - Google Patents

Throttle body arrangement structure for general-purpose V-type engine Download PDF

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JP4970347B2
JP4970347B2 JP2008140107A JP2008140107A JP4970347B2 JP 4970347 B2 JP4970347 B2 JP 4970347B2 JP 2008140107 A JP2008140107 A JP 2008140107A JP 2008140107 A JP2008140107 A JP 2008140107A JP 4970347 B2 JP4970347 B2 JP 4970347B2
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throttle
crankshaft
general
valve
bank
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JP2009287447A (en
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迅人 松田
照幸 齋藤
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Honda Motor Co Ltd
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Honda Motor Co Ltd
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Priority to JP2008140107A priority Critical patent/JP4970347B2/en
Priority to US12/470,618 priority patent/US20090293822A1/en
Priority to CN2009102035733A priority patent/CN101592076B/en
Priority to CN201110363307.4A priority patent/CN102392737B/en
Priority to EP09251409A priority patent/EP2141345B1/en
Priority to AT09251409T priority patent/ATE493576T1/en
Priority to DE602009000486T priority patent/DE602009000486D1/en
Priority to ES09251409T priority patent/ES2356114T3/en
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    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

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  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)

Description

本発明は，クランク軸を支持するクランクケースに，クランク軸の軸線を含む平面を中心にしてＶ字状に配置される第１バンク及び第２バンクを連設してなる汎用Ｖ型エンジンにおけるスロットルボディ配設構造の改良に関する。 The present invention relates to a crankcase supporting a crankshaft, a throttle in the first bank and a general-purpose V-type engine that the second bank formed by continuously provided which are arranged in a V-shape around a plane including the axis of the crankshaft The present invention relates to an improvement of the body arrangement structure .

かゝる汎用Ｖ型エンジンは，例えば特許文献１に開示されるように，既に知られている。   Such a general-purpose V-type engine is already known as disclosed in Patent Document 1, for example.

汎用Ｖ型エンジンは，使用後，夜間屋外に長時間放置されることが多いため，寒冷時には，スロットル弁の弁軸周りに大きな結露，氷結が発生し，スロットル弁を固着させてしまい，エンジンが直ちには使用できなくなる場合がある。
特開２００−１２０６５１号公報 Since general-purpose V-type engines are often left outdoors for a long time after use, large condensation or icing occurs around the valve shaft of the throttle valve during cold weather, causing the throttle valve to stick, It may become impossible to use immediately.
Japanese Patent Laid-Open No. 200-120651

本発明は，かゝる事情に鑑みてなされたもので，寒冷時でも，スロットル弁の弁軸周りに大きな結露，氷結の発生を簡単に防ぐことができる汎用Ｖ型エンジンにおけるスロットルボディ配設構造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 a throttle body arrangement structure in a general-purpose V-type engine that can easily prevent the occurrence of large condensation and icing around the valve shaft of the throttle valve even in cold weather. The purpose is to provide.

上記目的を達成するために，本発明は，クランク軸を支持するクランクケースに，クランク軸の軸線を含む平面を中心にしてＶ字状に配置される第１バンク及び第２バンクを連設してなる汎用Ｖ型エンジンにおいて，第１バンク及び第２バンク間に，これら第１バンク及び第２バンクにそれぞれ取り付けられる各独立した第１及び第２スロットルボディを配設してなり，第１及び第２スロットルボディは，それぞれ吸気道，この吸気道を開閉するバタフライ式のスロットル弁及びこのスロットル弁より下流の前記吸気道に燃料を噴射する燃料噴射弁を備える，汎用Ｖ型エンジンにおけるスロットルボディ配設構造であって，前記クランク軸の水平姿勢で運転されるホリゾンタル式汎用Ｖ型エンジン及び前記クランク軸の鉛直姿勢で運転されるバーチカル式汎用Ｖ型エンジンの何れにも適用可能にすべく，第１及び第２スロットルボディを，それぞれの吸気道の軸線が，対応するバンクの軸線とクランク軸の軸線とを含む平面に対して略垂直となるようにそれぞれ配置し，前記各スロットル弁を，その弁軸の軸線が，対応する吸気道の軸線と略直交し且つ対応するバンクの軸線と略平行となるように第１及び第２スロットルボディにそれぞれ軸支し，第１及び第２スロットルボディの各燃料噴射弁を，ホリゾンタル及びバーチカルの何れの形式の汎用Ｖ型エンジンにおいても燃料噴射口が斜め下向きとなるように配置したことを第１の特徴とする。尚，前記エンジン据え付け面は，後述する本発明の実施例中のエンジン据え付けフランジ３０に対応する。 To achieve the above object, the present invention is the crankcase for supporting the crankshaft, and continuously provided a first bank and a second bank arranged in a V-shape around a plane including the axis of the crankshaft In the general-purpose V-type engine, the first and second throttle bodies respectively attached to the first bank and the second bank are disposed between the first bank and the second bank, respectively. the second throttle body, an intake passage, and a fuel injection valve for injecting fuel to the downstream of the intake passage from the throttle valve and the throttle valve of the butterfly to open and close the intake passage, a throttle body distribution of the versatile V-type engine a set structure is operated in a vertical orientation of horizontal type universal V-type engine and the crankshaft which is operated at a horizontal position of the crankshaft Chikaru formula in order to to be applied to any general-purpose V-type engine, the first and second throttle bodies, the axis of the respective intake canal, with respect to a plane including the axes of the crankshaft of the corresponding bank The throttle valves are respectively arranged so as to be substantially vertical, and the first and second throttle valves are arranged so that the axis of the valve shaft is substantially perpendicular to the axis of the corresponding intake passage and substantially parallel to the axis of the corresponding bank . 2 Each of the fuel injection valves of the first and second throttle bodies is pivotally supported on the throttle body and arranged so that the fuel injection port is obliquely downward in any of the horizontal and vertical general-purpose V-type engines. Is the first feature. The engine mounting surface corresponds to an engine mounting flange 30 in an embodiment of the present invention described later.

また本発明は，第１の特徴に加えて，第１及び第２スロットルボディに互換性を付与すると共に，第１及び第２スロットルボディの各燃料噴射弁を，その外端がクランク軸の軸線方向におけるエンジンの同一外面側を向くように配置したことを第２の特徴とする。 In addition to the first feature, the present invention provides compatibility between the first and second throttle bodies, and each fuel injection valve of the first and second throttle bodies, the outer end of which is the axis of the crankshaft. in that a same outer surface side of the engine in the direction countercurrent memorial and second features.

本発明の第１の特徴によれば，第１及び第２スロットルボディを，それぞれの吸気道の軸線が，対応するバンクの軸線とクランク軸の軸線とを含む平面に対して略垂直となるようにそれぞれ配置し，各スロットル弁を，その弁軸の軸線が，対応する吸気道の軸線と略直交し且つ対応するバンクの軸線と略平行となるように第１及び第２スロットルボディにそれぞれ軸支したので，エンジンをクランク軸の水平姿勢で運転されるホリゾンタル型として使用する場合には，第１及び第２スロットルボディのスロットル弁の弁軸は水平面に対して傾斜することになるため，弁軸の外周面で結露した水滴の多くは，弁軸に沿って下方に流れ，そして傾斜した吸気道の底面に達すると，その底面に沿って下方に流れることで，弁軸から離脱していき，弁軸に大きな水滴が付着したまゝになることを防ぎ，大きな水滴の氷結によるスロットル弁の弁軸の固着を防ぐことができる。またエンジンを，クランク軸の鉛直姿勢で運転されるバーチカル型として使用する場合には，第１及び第２スロットルボディの吸気道もスロットル弁も略水平となるため，吸気道内の弁軸の両端部周りで結露した水滴の多くは，吸気道の底面側へ流れることで，弁軸から離脱していく。したがって，この場合も弁軸に大きな水滴が付着したまゝになることを防ぎ，大きな水滴の氷結によるスロットル弁の弁軸の固着を防ぐことができる。また，各燃料噴射弁を，ホリゾンタル及びバーチカルの何れの形式の汎用Ｖ型エンジンにおいても燃料噴射口が斜め下向きとなるように配置したので，エンジンをこれらの何れの形式にして使用する場合でも，エンジンＥの運転停止後，各燃料噴射弁の燃料噴射口に残留した燃料は速やかに滴り落ち，燃料噴射口に燃料が残留し続けることはない。このように，エンジンをホリゾンタル型及びバーチカル型の何れの型にして使用する場合でも，第１及び第２スロットルボディを変更することなく，各スロットル弁の結露，氷結による固着を簡単に防ぐことができ，またエンジンの運転停止後に燃料噴射口に燃料が残留し続けることも防止できるから，常に電動モータの作動によりスロットル弁を的確に開閉駆動できて，エンジンを直ちに運転させることができると共に，残留生成物による燃料噴射弁の作動不良をも回避することができる。 According to the first aspect of the present invention, the first and second throttle bodies are arranged such that the axis of each intake passage is substantially perpendicular to the plane including the axis of the corresponding bank and the axis of the crankshaft. The throttle valves are respectively arranged on the first and second throttle bodies so that the axis of the valve shaft is substantially perpendicular to the axis of the corresponding intake passage and substantially parallel to the axis of the corresponding bank. Therefore, when the engine is used as a horizontal type operated with a horizontal crankshaft , the valve shafts of the throttle valves of the first and second throttle bodies are inclined with respect to the horizontal plane. Most of the water droplets condensed on the outer peripheral surface of the shaft flows downward along the valve shaft, and when it reaches the bottom surface of the inclined intake passage, it flows downward along the bottom surface and then leaves the valve shaft. ,valve Large water droplets is prevented to become or attached ゝ, it is possible to prevent the sticking of the valve shaft of the throttle valve by freezing of large water droplets. Further, when the engine is used as a vertical type operated with the crankshaft in a vertical posture, the intake passage and the throttle valve of the first and second throttle bodies are substantially horizontal, so that both end portions of the valve shaft in the intake passage are provided. Many of the water droplets that have condensed on the periphery flow away from the valve shaft by flowing toward the bottom of the intake passage. Therefore, in this case as well, it is possible to prevent large water droplets from adhering to the valve shaft, and to prevent sticking of the valve shaft of the throttle valve due to freezing of large water droplets. In addition, since each fuel injection valve is arranged so that the fuel injection port is obliquely downward in any type of general-purpose V-type engine of horizontal and vertical, even when the engine is used in any of these types, After the operation of the engine E is stopped, the fuel remaining in the fuel injection port of each fuel injection valve drip quickly, and the fuel does not continue to remain in the fuel injection port. In this way, regardless of whether the engine is used in a horizontal type or a vertical type, it is possible to easily prevent condensation of each throttle valve due to condensation and icing without changing the first and second throttle bodies. can, also because it Ru prevents continuing to residual fuel in the fuel injection port after shutdown of the engine, always be accurately opening and closing the throttle valve by operation of the electric motor, it is possible to immediately operate the engine Rutotomoni , Ru can be avoided even a malfunction of the fuel injection valve due to the residual product.

また第１及び第２スロットルボディは，第１及び第２バンク間の谷間に配置されるので，両スロットルボディの設置のために上記谷間を有効利用できて，Ｖ型エンジンのコンパクトを図ることができると共に，各スロットルボディから対応するバンクまでの吸気路長を極力短くすることができ，エンジンの加速応答性の向上を図ることができる。   In addition, since the first and second throttle bodies are arranged in the valley between the first and second banks, the valley can be effectively used for installing both throttle bodies, and the V-type engine can be made compact. In addition, the intake path length from each throttle body to the corresponding bank can be shortened as much as possible, and the acceleration response of the engine can be improved.

本発明の第２の特徴によれば，第１及び第２スロットルボディとして，同一構造のスロットルボディの使用が可能であり，生産性の向上とコストの低減に寄与し得る。その際，第１及び第２スロットルボディは，それぞれの燃料噴射弁の外端を，クランク軸の軸線方向におけるエンジンの同一外面側に向けて配置されるので，エンジンの同一外面側から両スロットルボディの燃料噴射弁の脱着や点検整備を行うことができ，メンテナンス性が良好である。 According to the second feature of the present invention, the throttle body having the same structure can be used as the first and second throttle bodies, which can contribute to the improvement of productivity and the reduction of cost. At that time, since the first and second throttle bodies are arranged with the outer ends of the respective fuel injection valves facing the same outer surface of the engine in the axial direction of the crankshaft , both throttle bodies are arranged from the same outer surface of the engine. The fuel injection valve can be removed and inspected and maintained, providing good maintainability.

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はホリゾンタル型で使用する本発明の汎用Ｖ型エンジンの，要部を破断した正面図，図２は図１の２矢視図，図３はバーチカル型で使用する本発明の汎用Ｖ型エンジンの，要部を破断した平面図である。   FIG. 1 is a front view of a general-purpose V-type engine of the present invention used in a horizontal type, with the main part cut away, FIG. 2 is a view taken in the direction of arrow 2 in FIG. 1, and FIG. 3 is a general-purpose V-type of the present invention used in a vertical type It is the top view which fractured | ruptured the principal part of the engine.

図１及び図２において，本発明を汎用Ｖ型２気筒エンジンＥに適用した例について説明する。このエンジンＥは，クランク軸１を支持するクランクケース２と，このクランクケース２の上部に連設され，上記クランク軸１の軸線Ａ１を含む鉛直面Ｐ１を中心としてＶ字状に開いて配置される第１及び第２バンクＢ１，Ｂ２とから構成される。前記鉛直面Ｐ１は，第１及び第２バンクＢ１，Ｂ２の第２軸線Ａ２，Ａ２間の夾角α（図示例では９０°）の２等分線を含むことになる。   1 and 2, an example in which the present invention is applied to a general-purpose V-type two-cylinder engine E will be described. The engine E is connected to a crankcase 2 that supports the crankshaft 1 and an upper portion of the crankcase 2 and is arranged to open in a V shape with a vertical plane P1 including the axis A1 of the crankshaft 1 as a center. And first and second banks B1 and B2. The vertical plane P1 includes a bisector of a depression angle α (90 ° in the illustrated example) between the second axes A2 and A2 of the first and second banks B1 and B2.

第１及び第２バンクＢ１，Ｂ２は，１本の気筒３をそれぞれ備えており，各気筒３には，上記クランク軸１にコンロッド４を介して連接されるピストン５が嵌装される。また第１及び第２バンクＢ１，Ｂ２の各シリンダヘッド６の正面側（図１の紙面側）で相対向する角部には，第１及び第２バンクＢ１，Ｂ２の吸気ポートに連なるエルボ状の吸気管７がそれぞれボルト接合される。各吸気管７の上流端には，対応するバンクＢ１，Ｂ２の軸線Ａ２と平行に延びる取り付けフランジ７ａが形成されており，これら取り付けフランジ７ａに，第１及び第２バンクＢ１，Ｂ２間に配置される各独立した第１及び第２スロットルボディＴ１，Ｔ２がそれぞれボルト結合される。 Each of the first and second banks B1 and B2 includes one cylinder 3, and each cylinder 3 is fitted with a piston 5 connected to the crankshaft 1 via a connecting rod 4. Further, at the corners facing each other on the front side of the cylinder heads 6 of the first and second banks B1 and B2 (the paper surface side in FIG. 1), elbows connected to the intake ports of the first and second banks B1 and B2 are formed. The intake pipes 7 are respectively bolted. At the upstream end of each intake pipe 7, a mounting flange 7a extending in parallel with the axis A2 of the corresponding bank B1, B2 is formed. The mounting flange 7a is disposed between the first and second banks B1, B2. The independent first and second throttle bodies T1, T2 are respectively bolted.

その際，第１及び第２スロットルボディＴ１，Ｔ２は，各吸気管７に連なる吸気道８の軸線Ａ３が，クランク軸１の軸線Ａ１と対応するバンクＢ１，Ｂ２の軸線Ａ２とを含む平面Ｐ２に対して略垂直となるように配置される。   At that time, the first and second throttle bodies T1 and T2 have a plane P2 in which the axis A3 of the intake passage 8 connected to each intake pipe 7 includes the axis A1 of the crankshaft 1 and the axis A2 of the banks B1 and B2. It is arrange | positioned so that it may become substantially perpendicular | vertical with respect to.

また第１及び第２スロットルボディＴ１，Ｔ２には，それぞれの吸気道８を開閉するスロットル弁９と，このスロットル弁９より下流側の吸気道８に燃料を噴射する電磁式の燃料噴射弁１０とが設けられる。各スロットル弁９はバタフライ式に構成されるもので，その弁軸９ａは，対応するスロットルボディＴ１，Ｔ２に回転自在に支持される。   The first and second throttle bodies T1 and T2 include a throttle valve 9 that opens and closes the intake passage 8 and an electromagnetic fuel injection valve 10 that injects fuel into the intake passage 8 downstream of the throttle valve 9. And are provided. Each throttle valve 9 is configured as a butterfly type, and its valve shaft 9a is rotatably supported by the corresponding throttle bodies T1 and T2.

その際，弁軸９ａは，その軸線Ａ４が対応する吸気道８の軸線Ａ３と直交し且つ対応するバンクＢ１，Ｂ２の軸線Ａ２と平行するように配置される。   At that time, the valve shaft 9a is arranged so that its axis A4 is orthogonal to the axis A3 of the corresponding intake passage 8 and parallel to the axis A2 of the corresponding banks B1 and B2.

また第１及び第２スロットルボディＴ１，Ｔ２の，各弁軸９ａと直交する第１側面１１には，スロットル弁９を開閉駆動すべく弁軸９ａの一端に出力部を連結する電動モータ１５と，それを収容するモータハウジング１６とが取り付けられ，また第１側面１１と正反対の第２側面１２には，スロットル弁９の開度を検出するスロットルセンサ１７と，それを収容するセンサハウジング１８とが取り付けられる。   Further, on the first side surface 11 of the first and second throttle bodies T1, T2 orthogonal to the respective valve shafts 9a, an electric motor 15 for connecting an output portion to one end of the valve shaft 9a for opening and closing the throttle valve 9 is provided. , A motor housing 16 for accommodating the throttle valve 9 is attached, and a second side surface 12 opposite to the first side surface 11 is provided with a throttle sensor 17 for detecting the opening degree of the throttle valve 9 and a sensor housing 18 for accommodating the throttle sensor 9. Is attached.

また第１及び第２スロットルボディＴ１，Ｔ２の，上記第１及び第２側面１１，１２と直角をなす第３側面１３には前記燃料噴射弁１０が噴射弁ホルダ２０を介して取り付けられ，噴射弁ホルダ２０は，一対の締結ボルト２１により上記第３側面１３に固着される。   The fuel injection valve 10 is attached to the third side surface 13 of the first and second throttle bodies T1 and T2 perpendicular to the first and second side surfaces 11 and 12 via the injection valve holder 20, and the injection is performed. The valve holder 20 is fixed to the third side surface 13 by a pair of fastening bolts 21.

その際，燃料噴射弁１０は，その軸線Ａ５を，対応する吸気道８の軸線Ａ３を含み且つ対応するバンクＢ１，Ｂ２の軸線Ａ２と略直交する平面Ｐ３上を通り，且つホリゾンタル及びバーチカルの何れの形式の汎用Ｖ型エンジンにおいても燃料噴射口が斜め下向きとなるように配置される。 At that time, the fuel injection valve 10 passes through its axis A5 on a plane P3 including the axis A3 of the corresponding intake passage 8 and substantially orthogonal to the axis A2 of the corresponding banks B1 and B2 , and either horizontal or vertical. Also in the general-purpose V-type engine of this type, the fuel injection ports are arranged so as to be inclined downward.

噴射弁ホルダ２０には，燃料噴射弁１０の燃料入口に連なる燃料ジョイント２０ａが一体に形成されており，この燃料ジョイント２０ａには，燃料ポンプの圧送燃料を誘導する燃料導管（図示せず）が接続される。 The injector holder 20, the fuel joint 20 a leading to the fuel inlet of the fuel injection valve 10 is formed integrally, this fuel joint 20 a, without fuel conduit (shown to induce pumping fuel in the fuel pump ) Is connected.

第１及び第２スロットルボディＴ１，Ｔ２は，互換性を持つように同一構造のスロットルボディで構成される。そして，第１及び第２スロットルボディＴ１，Ｔ２は，燃料噴射弁１０を，その外端がエンジンＥのクランク軸１の軸線方向における同一外面側，図示例では正面側（図１の紙面側）を向くように配置される。その結果，第１及び第２スロットルボディＴ１，Ｔ２では，電動モータ１５を取り付ける第１側面１１と，スロットルセンサ１７を取り付ける第２側面１２との向きは正反対となる。 The first and second throttle bodies T1, T2 are composed of throttle bodies having the same structure so as to be compatible. The first and second throttle bodies T1 and T2 have the fuel injection valve 10 whose outer end is on the same outer surface side in the axial direction of the crankshaft 1 of the engine E, in the illustrated example, on the front side (paper surface side in FIG. 1). a is placed in direction memorial service. As a result, in the first and second throttle bodies T1 and T2, the directions of the first side surface 11 to which the electric motor 15 is attached and the second side surface 12 to which the throttle sensor 17 is attached are opposite to each other.

第１及び第２スロットルボディＴ１，Ｔ２の，吸気道８上流側端部に吸気マニフォルド２４が接続される。吸気マニフォルド２４は，主管２５と，この主管２５からＶ字状に分岐した一対の分岐管２６，２６とで構成され，一対の分岐管２６，２６は，第１及び第２スロットルボディＴ１，Ｔ２の上流側端部に嵌合接続され，主管２５には，空気ダクト２７を介して，エンジンＥの直上に配設されるエアクリーナ２８が接続される。   An intake manifold 24 is connected to the upstream end of the intake passage 8 of the first and second throttle bodies T1, T2. The intake manifold 24 includes a main pipe 25 and a pair of branch pipes 26 and 26 branched from the main pipe 25 in a V-shape. The pair of branch pipes 26 and 26 includes the first and second throttle bodies T1 and T2. And an air cleaner 28 disposed immediately above the engine E is connected to the main pipe 25 via an air duct 27.

図１及び図３に示すように，前記クランクケース２は，第１及び第２バンクＢ１，Ｂ２に一体に連結される第１ケース半体２ａと，この第１ケース半体２ａにボルト接合される第２ケース半体とで構成され，この第２ケース半体には，このエンジンＥを各種作業機に据え付けるためのエンジン据え付けフランジ３０が形成される。この第２ケース半体として，図１及び図３に示すようにエンジン据え付けフランジ３０の位置を異にする２種類のもの２ｂ，２ｂ′が用意される。 As shown in FIGS. 1 and 3, the crankcase 2 is joined to the first and second banks B1 and B2 by a first case half 2a and bolted to the first case half 2a. that is composed of a second case half body, this second case halves, the engine mounting flange 30 for Ru mounting the engine E to the various work machine is formed. As the second case half, two types 2b and 2b 'having different positions of the engine mounting flange 30 as shown in FIGS. 1 and 3 are prepared.

第１の種類の第２ケース半体２ｂには（図１参照），クランク軸１の軸線Ａ１に略平行で，且つ略水平なエンジン据え付けフランジ３０が形成される。したがって，この第１の種類の第２ケース半体２ｂを組み入れたエンジンＥは，クランク軸１を略水平姿勢で運転するホリゾンタル型エンジンとなる。 The first type of the second case half 2b (see FIG. 1), substantially parallel to the axis A 1 of the crank shaft 1, and substantially horizontal engine mounting flange 30 is formed. Therefore, the engine E incorporating the first type second case half 2b is a horizontal engine that operates the crankshaft 1 in a substantially horizontal posture.

また第２の種類の第２ケース半体２ｂ′（図３参照）には，クランク軸１の軸線Ａ１と略直交し，且つ略水平なエンジン据え付けフランジ３０が形成される。したがって，この第２の種類の第２ケース半体２ｂ′を組み入れたエンジンＥは，クランク軸１を略垂直姿勢で運転するバーチカル型エンジンとなる。各エンジン据え付けフランジ３０の周縁部には，その据え付け用のボルト孔３０ａが設けられる。   The second case half 2b ′ (see FIG. 3) is provided with an engine mounting flange 30 that is substantially orthogonal to the axis A1 of the crankshaft 1 and that is substantially horizontal. Therefore, the engine E in which the second type second case half 2b 'is incorporated is a vertical engine that operates the crankshaft 1 in a substantially vertical posture. Bolt holes 30a for installation are provided at the peripheral edge of each engine installation flange 30.

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.

エンジンＥの運転による作業機の作動中，エアクリーナ２８で濾過された空気は吸気マニフォルド２４により第１及び第２スロットルボディＴ１，Ｔ２の吸気道８に分配され，対応する燃料噴射弁１０からの噴射燃料と混合しながら第１及び第２気筒バンクＢ１，Ｂ２の各気筒３に吸入されていく。その際，図示しない電子制御ユニットは，予め入力された設定エンジン回転数を保持するように，第１及び第２スロットルボディＴ１，Ｔ２の電動モータ１５を作動してスロットル弁９の開度を制御すると共に，燃料噴射弁１０からの燃料噴射量を制御する。スロットル弁９の開度は，スロットルセンサ１７により検出され，上記電子制御ユニットにフィードバックされる。   During the operation of the working machine by the operation of the engine E, the air filtered by the air cleaner 28 is distributed to the intake passages 8 of the first and second throttle bodies T1 and T2 by the intake manifold 24 and injected from the corresponding fuel injection valves 10. While being mixed with fuel, it is sucked into each cylinder 3 of the first and second cylinder banks B1, B2. At that time, an electronic control unit (not shown) operates the electric motors 15 of the first and second throttle bodies T1 and T2 to control the opening degree of the throttle valve 9 so as to maintain the preset engine speed input in advance. At the same time, the fuel injection amount from the fuel injection valve 10 is controlled. The opening degree of the throttle valve 9 is detected by the throttle sensor 17 and fed back to the electronic control unit.

ところで，例えば，寒冷地での夜間，運転を終えたエンジンＥを長時間，屋外に放置した場合には，各スロットルボディＴ１，Ｔ２の吸気道８内の空気に含まれる水分がスロットル弁９の弁軸９ａ周り，特に弁軸９ａを支持するスロットルボディＴ１，Ｔ２の軸受孔で大きな水滴が氷結すると，スロットル弁９を強固に固着させることがあり，そうなると，電動モータ１５の作動によるスロットル弁９の開閉駆動は不能，もしくは極めて困難となる。   By the way, for example, when the engine E that has been operated at night in a cold region is left outdoors for a long time, moisture contained in the air in the intake passage 8 of each throttle body T1, T2 is absorbed by the throttle valve 9. When a large water droplet freezes around the valve shaft 9a, particularly in the bearing holes of the throttle bodies T1 and T2 that support the valve shaft 9a, the throttle valve 9 may be firmly fixed. The opening / closing drive of is impossible or extremely difficult.

その点，本発明によれば，図１に示すように，エンジンＥを，クランク軸１の水平姿勢で運転されるホリゾンタル型として使用する場合には，第１及び第２スロットルボディＴ１，Ｔ２の前述のような配置により，即ち各独立した第１及び第２スロットルボディＴ１，Ｔ２を，吸気道８の軸線Ａ３が，クランク軸１の軸線Ａ１と対応するバンクＢ１，Ｂ２の軸線Ａ２とを含む平面Ｐ２に対して略垂直となるように配置したことにより，第１及び第２スロットルボディＴ１，Ｔ２の各吸気道８は，水平面に対して略４５°の角度で傾斜し，また各吸気道８の軸線Ａ３に対して直交するスロットル弁９の弁軸９ａも水平面に対して４５°の角度で傾斜することになるため，弁軸９ａの外周面で結露した水滴の多くは，弁軸９ａに沿って下方に流れ，そして傾斜した吸気道８の底面に達すると，その底面に沿って下方に流れることで，弁軸９ａから離脱していく。したがって，弁軸９ａに大きな水滴が付着したまゝになることを防ぎ，大きな水滴の氷結によるスロットル弁９の弁軸９ａの固着を防ぐことができる。 In this respect, according to the present invention, as shown in FIG. 1, when using the engine E, as Horizontal type operated in a horizontal position of the crank shaft 1, the first and second throttle bodies T1, T2 In other words , the first and second throttle bodies T1 and T2 that are independent of each other, the axis A3 of the intake passage 8 is connected to the axis A2 of the banks B1 and B2 corresponding to the axis A1 of the crankshaft 1. By arranging it so as to be substantially perpendicular to the plane P2 that includes it, the intake passages 8 of the first and second throttle bodies T1, T2 are inclined at an angle of about 45 ° with respect to the horizontal plane, and each intake air Since the valve shaft 9a of the throttle valve 9 orthogonal to the axis A3 of the road 8 is also inclined at an angle of 45 ° with respect to the horizontal plane, most of the water droplets condensed on the outer peripheral surface of the valve shaft 9a Flows down along 9a, Then, when the bottom surface of the inclined intake passage 8 is reached, it flows downward along the bottom surface, so that it separates from the valve shaft 9a. Accordingly, it is possible to prevent the large amount of water droplets from adhering to the valve shaft 9a, and to prevent the valve shaft 9a of the throttle valve 9 from sticking due to freezing of the large water droplets.

また図３に示すように，エンジンＥを，クランク軸１の鉛直姿勢で運転されるバーチカル型として使用する場合には，第１及び第２スロットルボディＴ１，Ｔ２の各吸気道８は略水平となり，スロットル弁９の弁軸９ａも略水平となる。このため，吸気道８内の弁軸９ａの両端部周りで結露した水滴の多くは，吸気道８の底面側へ流れることで，弁軸９ａから離脱していく。したがって，この場合も弁軸９ａに大きな水滴が付着したまゝになることを防ぎ，大きな水滴の氷結によるスロットル弁９の弁軸９ａの固着を防ぐことができる。 In addition, as shown in FIG. 3, the engine E, when used as a vertical type which is operated in a vertical orientation of the crank shaft 1, the intake passage 8 of the first and second throttle bodies T1, T2 is substantially horizontal Thus, the valve shaft 9a of the throttle valve 9 is also substantially horizontal. For this reason, most of the water droplets condensed around both ends of the valve shaft 9 a in the intake passage 8 flow away from the valve shaft 9 a by flowing toward the bottom surface side of the intake passage 8. Therefore, in this case as well, it is possible to prevent a large water droplet from adhering to the valve shaft 9a and to prevent the valve shaft 9a of the throttle valve 9 from sticking due to freezing of the large water droplet.

このように，エンジンＥをホリゾンタル及びバーチカルの何れの型にして使用する場合でも，第１及び第２スロットルボディＴ１，Ｔ２を変更することなく，各スロットル弁９の結露，氷結による固着を簡単に防ぐことができるから，常に電動モータ１５の作動によりスロットル弁９を的確に開閉駆動できて，エンジンＥを直ちに運転させ，作業を開始することができる。   In this way, regardless of whether the engine E is used as a horizontal or vertical type, the throttle valve 9 can be easily fixed by condensation or icing without changing the first and second throttle bodies T1, T2. Therefore, the throttle valve 9 can always be accurately opened and closed by the operation of the electric motor 15, the engine E can be immediately operated, and the operation can be started.

また第１及び第２スロットルボディＴ１，Ｔ２は，第１及び第２バンクＢ１，Ｂ２間の谷間に配置されるので，両スロットルボディＴ１，Ｔ２の設置のために上記谷間を有効利用できて，Ｖ型エンジンＥのコンパクト化を図ることができると共に，各スロットルボディＴ１，Ｔ２から対応するバンクＢ１，Ｂ２までの吸気路長を極力短くすることができ，エンジンＥの加速応答性の向上を図ることができる。 Also, since the first and second throttle bodies T1, T2 are arranged in the valley between the first and second banks B1, B2, the above valley can be used effectively for the installation of both throttle bodies T1, T2. The V-type engine E can be made compact , and the intake path length from each throttle body T1, T2 to the corresponding bank B1, B2 can be shortened as much as possible to improve the acceleration response of the engine E. be able to.

さらに第１及び第２スロットルボディＴ１，Ｔ２において，各燃料噴射弁１０は，その軸線Ａ５が，対応する吸気道８の軸線Ａ３を含み且つ対応するバンクＢ１，Ｂ２の軸線Ａ２と略直交する平面Ｐ３上を通り，且つホリゾンタル及びバーチカルの何れの形式の汎用Ｖ型エンジンにおいても燃料噴射口が斜め下向きとなるように配置されるので，エンジンＥをホリゾンタル及びバーチカルの何れの型にして使用する場合でも，各燃料噴射弁１０は，常に燃料噴射口を斜め下向きにした姿勢を保つことができる。したがって，エンジンＥの運転停止後，各燃料噴射弁１０の燃料噴射口に残留した燃料は速やかに滴り落ち，燃料噴射口に燃料が残留し続けることはないから，残留燃料の劣化による残留生成物の形成を防ぎ，残留生成物による燃料噴射弁１０の作動不良を回避することができる。 In addition the first and second throttle bodies T1, T2, each fuel injection valve 10, its axis A5 is, corresponding plane axis A2 substantially perpendicular banks B1, B2 of and corresponding includes the axis A3 of the intake path 8 pass over P3, and so Horizontal and fuel injection port in any form universal V-type engine of the vertical is arranged so as to obliquely downward, when used in the engine E in any type of Horizontal and vertical However, each fuel injection valve 10 can always maintain a posture in which the fuel injection port is obliquely downward. Therefore, after the operation of the engine E is stopped, the fuel remaining in the fuel injection port of each fuel injection valve 10 is dripped quickly and the fuel does not continue to remain in the fuel injection port. And the malfunction of the fuel injection valve 10 due to the residual product can be avoided.

さらにまた第１及び第２スロットルボディＴ１，Ｔ２は，互換性を有するので，同一構造のスロットルボディの使用が可能であり，生産性の向上とコストの低減に寄与し得る。その際，第１及び第２スロットルボディＴ１，Ｔ２は，それぞれの燃料噴射弁１０の外端を，クランク軸１の軸線Ａ１方向におけるエンジンＥの同一外面側に向けて配置されるので，エンジンＥの同一外面側から両スロットルボディＴ１，Ｔ２の燃料噴射弁１０の脱着や点検整備を行うことができ，メンテナンス性が良好である。 Furthermore, since the first and second throttle bodies T1 and T2 are interchangeable, it is possible to use a throttle body having the same structure, which can contribute to improvement in productivity and cost reduction. At that time, the first and second throttle bodies T1, T2 are arranged with the outer ends of the respective fuel injection valves 10 facing the same outer surface side of the engine E in the direction of the axis A1 of the crankshaft 1. The fuel injection valves 10 of both throttle bodies T1 and T2 can be removed and inspected and maintained from the same outer surface side, and the maintainability is good.

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，エンジンＥを図３に示すようにバーチカル型として使用する場合には，クランクケース２の第１ケース半体２ａ及び第１，第２バンクＢ１，Ｂ２にもエンジン据え付けフランジを形成することができる。   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, when the engine E is used as a vertical type as shown in FIG. 3, engine mounting flanges may also be formed in the first case half 2a of the crankcase 2 and the first and second banks B1 and B2. it can.

ホリゾンタル型で使用する本発明の汎用Ｖ型エンジンの，要部を破断した正面図。The front view which fractured | ruptured the principal part of the general purpose V-type engine of this invention used with a horizontal type | mold. 図１の２矢視図。FIG. 2 is a view taken in the direction of arrow 2 in FIG. 1. バーチカル型で使用する本発明の汎用Ｖ型エンジンの，要部を破断した平面図。The top view which fractured | ruptured the principal part of the general purpose V-type engine of this invention used with a vertical type | mold.

Ｅ・・・・・・・汎用Ｖ型エンジン
Ｂ１・・・・・・第１バンク
Ｂ２・・・・・・第２バンク
Ｔ１・・・・・・第１スロットルボディ
Ｔ２・・・・・・第２スロットルボディ
Ａ１・・・・・・クランク軸の軸線
Ａ２・・・・・・各バンクの軸線
Ａ３・・・・・・吸気道の軸線
Ａ４・・・・・・スロットル弁の弁軸の軸線
Ａ５・・・・・・燃料噴射弁の軸線
Ｐ１・・・・・・クランク軸の軸線を含み第１，第２バンク間の中心を通る平面
Ｐ２・・・・・・クランク軸の軸線と各バンクの軸線とを含む平面
１・・・・・・・クランク軸
２・・・・・・・クランクケース
８・・・・・・・吸気道
９・・・・・・・スロットル弁
９ａ・・・・・・弁軸
１０・・・・・・燃料噴射弁
E ... General purpose V-type engine B1 ... First bank B2 ... Second bank T1 ... First throttle body T2 ... Second throttle body A1... Crankshaft axis A2... Each bank axis A3... Intake passage axis A4. Axis A5... Fuel injection valve axis P1... Plane P2 including the axis of the crankshaft and passing through the center between the first and second banks... Plane 1 including the axis of each bank ... Crankshaft 2 ... Crankcase 8 ... Intake passage 9 ... Throttle valve 9a ... Valve shaft 10 ... Fuel injection valve

Claims (2)

クランク軸（１）を支持するクランクケース（２）に，クランク軸（１）の軸線（Ａ１）を含む平面（Ｐ１）を中心にしてＶ字状に配置される第１バンク（Ｂ１）及び第２バンク（Ｂ２）を連設してなる汎用Ｖ型エンジンにおいて，第１バンク（Ｂ１）及び第２バンク（Ｂ２）間に，これら第１バンク（Ｂ１）及び第２バンク（Ｂ２）にそれぞれ取り付けられる各独立した第１及び第２スロットルボディ（Ｔ１，Ｔ２）を配設してなり，第１及び第２スロットルボディ（Ｔ１，Ｔ２）は，それぞれ吸気道（８），この吸気道（８）を開閉するバタフライ式のスロットル弁（９）及びこのスロットル弁（９）より下流の前記吸気道（８）に燃料を噴射する燃料噴射弁（１０）を備える，汎用Ｖ型エンジンにおけるスロットルボディ配設構造であって，
前記クランク軸（１）の水平姿勢で運転されるホリゾンタル式汎用Ｖ型エンジン及び前記クランク軸（１）の鉛直姿勢で運転されるバーチカル式汎用Ｖ型エンジンの何れにも適用可能にすべく，
第１及び第２スロットルボディ（Ｔ１，Ｔ２）を，それぞれの吸気道（８）の軸線（Ａ３）が，対応するバンク（Ｂ１，Ｂ２）の軸線（Ａ２）とクランク軸（１）の軸線（Ａ１）とを含む平面（Ｐ２）に対して略垂直となるようにそれぞれ配置し，
前記各スロットル弁（９）を，その弁軸（９ａ）の軸線（Ａ４）が，対応する吸気道（８）の軸線（Ａ３）と略直交し且つ対応するバンク（Ｂ１，Ｂ２）の軸線（Ａ２）と略平行となるように第１及び第２スロットルボディ（Ｔ１，Ｔ２）にそれぞれ軸支し，
第１及び第２スロットルボディ（Ｔ１，Ｔ２）の各燃料噴射弁（１０）を，ホリゾンタル及びバーチカルの何れの形式の汎用Ｖ型エンジンにおいても燃料噴射口が斜め下向きとなるように配置したことを特徴とする汎用Ｖ型エンジンにおけるスロットルボディ配設構造。 A first bank (B1) and a first bank (B1) arranged in a V shape centering on a plane (P1) including an axis (A1) of the crankshaft (1) are mounted on a crankcase (2) that supports the crankshaft (1). In a general-purpose V-type engine having two banks (B2) connected in series , the first bank (B1) and the second bank (B2) are respectively attached between the first bank (B1) and the second bank (B2). The independent first and second throttle bodies (T1, T2) are arranged, and the first and second throttle bodies (T1, T2) are respectively connected to the intake passage (8) and the intake passage (8). A throttle body arrangement in a general-purpose V-type engine comprising a butterfly throttle valve (9) that opens and closes and a fuel injection valve (10) that injects fuel into the intake passage (8) downstream of the throttle valve (9) Structure Te,
In order to be applicable to both a horizontal general-purpose V-type engine operated in a horizontal posture of the crankshaft (1) and a vertical general-purpose V-type engine operated in a vertical posture of the crankshaft (1),
The first and second throttle bodies ( T1, T2) are connected to the axes (A3) of the corresponding intake passages (8), the axes (A2) of the corresponding banks (B1, B2) and the axes (A2) of the crankshaft (1) ( A1) and respectively arranged substantially perpendicular to the plane (P2) containing,
Each throttle valve (9) has its axis (A4) of its valve shaft (9a) substantially orthogonal to the axis (A3) of the corresponding intake passage (8) and the axis of the corresponding bank (B1, B2) ( A2) are pivotally supported on the first and second throttle bodies (T1, T2) so as to be substantially parallel to each other,
The fuel injection valves (10) of the first and second throttle bodies (T1, T2) are arranged so that the fuel injection ports are inclined downward in any of the horizontal and vertical general-purpose V-type engines. A throttle body arrangement structure in a general-purpose V-type engine that is characterized. 請求項１記載の汎用Ｖ型エンジンにおけるスロットルボディ配設構造において，
第１及び第２スロットルボディ（Ｔ１，Ｔ２）に互換性を付与すると共に，第１及び第２スロットルボディ（Ｔ１，Ｔ２）の各燃料噴射弁（１０）を，その外端がクランク軸（１）の軸線（Ａ１）方向におけるエンジン（Ｅ）の同一外面側を向くように配置したことを特徴とする，汎用Ｖ型エンジンにおけるスロットルボディ配設構造。
０ The throttle body arrangement structure in the general-purpose V-type engine according to claim 1,
The first and second throttle bodies (T1, T2) are provided with compatibility, and the fuel injection valves (10) of the first and second throttle bodies (T1, T2) are connected to the crankshaft (1). identical to the outer surface, characterized in that arranged in direction memorial, throttle body mounting structure of the versatile V-type engine of the engine (E) in the axial (A1) direction).
0
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US12/470,618 US20090293822A1 (en) 2008-05-28 2009-05-22 General-purpose v-type engine
CN201110363307.4A CN102392737B (en) 2008-05-28 2009-05-27 General-purpose v-type engine
CN2009102035733A CN101592076B (en) 2008-05-28 2009-05-27 General-purpose V-type engine
EP09251409A EP2141345B1 (en) 2008-05-28 2009-05-28 General-purpose V-type engine
AT09251409T ATE493576T1 (en) 2008-05-28 2009-05-28 ALL-PURPOSE V ENGINE
DE602009000486T DE602009000486D1 (en) 2008-05-28 2009-05-28 General-purpose V-type engine
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JP2011247223A (en) * 2010-05-28 2011-12-08 Keihin Corp Intake control device for v-type engine
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JP5884366B2 (en) * 2011-09-27 2016-03-15 スズキ株式会社 Throttle device for internal combustion engine
CN107472006A (en) * 2017-06-28 2017-12-15 奇瑞汽车股份有限公司 A kind of layout pattern of plug-in hybrid-power automobile front deck

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JP2000120651A (en) * 1998-10-20 2000-04-25 Honda Motor Co Ltd V-type engine
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