To provide: a ship propulsion machine capable of curbing generation of ω-swirl in a combustion chamber of an engine; a ship including the ship propulsion machine; and a ship engine included in the ship propulsion machine.SOLUTION: A ship propulsion machine includes an engine 20 and a propeller driven with the engine 20. The engine 20 has: a cylinder head 29 provided with a combustion chamber 28 and a pair of intake openings 63 communicated with the combustion chamber 28; and a pair of intake ports 55 respectively connected to the pair of intake openings 63. In the pair of intake ports 55, a clearance D between downstream sections 55A connected to the intake openings 63 is reduced with the decreasing distance toward the intake openings 63.SELECTED DRAWING: Figure 5

    【課題】エンジンの燃焼室におけるωスワールの発生を抑制することができる船舶推進機、この船舶推進機を含む船舶、及び、この船舶推進機に含まれる船舶用エンジンを提供する。【解決手段】船舶推進機は、エンジン20と、エンジン20によって駆動されるプロペラと、を含む。エンジン20は、燃焼室28と燃焼室28に連通する一対の吸気口63とが設けられたシリンダヘッド29と、一対の吸気口63にそれぞれ接続された一対の吸気ポート55と、を含む。一対の吸気ポート55において吸気口63に接続される下流部55A同士の間隔Dは、吸気口63に近付くにつれて狭くなっている。【選択図】図5


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    Title :

    SHIP PROPULSION MACHINE, SHIP AND SHIP ENGINE


    Additional title:

    船舶推進機、船舶及び船舶用エンジン


    Contributors:

    Publication date :

    2023-05-25


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B63H Schiffsantrieb oder Steuerung der Schiffe , MARINE PROPULSION OR STEERING / F02F CYLINDERS, PISTONS, OR CASINGS FOR COMBUSTION ENGINES , Zylinder, Kolben oder Gehäuse für Brennkraftmaschinen / F02B INTERNAL-COMBUSTION PISTON ENGINES , Brennkraftmaschinen mit innerer Verbrennung mit Verdrängerwirkung



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