To simplify a structure of a cooling passage in an internal combustion engine.SOLUTION: In an internal combustion engine comprising a cylinder part 44 comprising a cylinder 45 and a cylinder head 46, and a water pump unit 81 attached to a side wall part 67R of the cylinder head 46, the cylinder portion 44 comprises a cooling water inlet part 85 to which a discharge port 93 of the water pump unit 81 is directly connected, and the cooling water inlet part 85 protrudes outward from a lower surface 46a of the cylinder part 44 in a side view facing the side wall part 67R of the cylinder head 46.SELECTED DRAWING: Figure 3

    【課題】内燃機関において、冷却通路の構造を簡単にする。【解決手段】シリンダー45及びシリンダーヘッド46を備えるシリンダー部44と、シリンダーヘッド46の側壁部67Rに取り付けられるウォーターポンプユニット81とを備える内燃機関において、シリンダー部44は、ウォーターポンプユニット81の吐出口93が直接接続される冷却水入口部85を備え、冷却水入口部85は、シリンダーヘッド46の側壁部67Rを臨む側面視において、シリンダー部44の下面46aから外側に突出している。【選択図】図3


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    Title :

    INTERNAL COMBUSTION ENGINE


    Additional title:

    内燃機関


    Contributors:

    Publication date :

    2019-08-22


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    F01P Kühlung von Kraft- und Arbeitsmaschinen oder Kraftmaschinen allgemein , COOLING OF MACHINES OR ENGINES IN GENERAL / B62M RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES , Antrieb von Radfahrzeugen oder Schlitten durch den Fahrer / F02B INTERNAL-COMBUSTION PISTON ENGINES , Brennkraftmaschinen mit innerer Verbrennung mit Verdrängerwirkung



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