To make compact a body of an internal combustion engine for saddle-riding type vehicle in which a crank case houses a gear speed changer having a plurality of speed changer shafts parallel with a crank shaft extending a vehicle width direction and a shift drum of a shift change device, by arranging a pair of oil pumps compactly and shortening an axial length of a pump shaft.SOLUTION: A single pump shaft 67 common to first and second oil pumps 65, 66 are supported rotatably by a crank case 12, rotors 71A, 71B for first oil pump that the first oil pump 65 comprises are arranged on mating surfaces 68 of a pair of left and right crank case halves 16, 17, and a rotor 73 for the second oil pump that the second oil pump 66 comprises is arranged between a pump gear 69 provided to the pump shaft 67 and the first oil pump 65, and on a side face on the opposite side from the mating surface 68 of the crank case half 17 between the pair of left and right crank case halves 16, 17.SELECTED DRAWING: Figure 4

    【課題】クランクケースに、車幅方向に延びるクランク軸と平行な複数の変速機軸を有する歯車変速機と、シフトチェンジ装置のシフトドラムとが収容される鞍乗り型車両用内燃機関において、一対のオイルポンプのコンパクトな配置ならびにポンプ軸の軸長短縮を可能とすることで機関本体の小型化を図る。【解決手段】第1および第2オイルポンプ65,66に共通な単一のポンプ軸67が、クランクケース12で回転自在に支持され、第1オイルポンプ65が備える第1オイルポンプ用ロータ71A,71Bが左右一対のクランクケース半体16,17の合わせ面68に配置され、第2オイルポンプ66が備える第2オイルポンプ用ロータ73が、ポンプ軸67に設けられるポンプ歯車69と、第1オイルポンプ65との間で、左右一対のクランクケース半体16,17の一方のクランクケース半体17の前記合わせ面68とは反対側の側面に配置される。【選択図】 図4


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    Title :

    INTERNAL COMBUSTION ENGINE FOR SADDLE-RIDING TYPE VEHICLE


    Additional title:

    鞍乗り型車両用内燃機関


    Contributors:

    Publication date :

    2018-11-01


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    F01M Schmierung von Kraft- und Arbeitsmaschinen oder Kraftmaschinen allgemein , LUBRICATING OF MACHINES OR ENGINES IN GENERAL / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / F16H Getriebe , GEARING



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