PROBLEM TO BE SOLVED: To prevent condensation of steam in exhaust gas which is caused by excessively cooling exhaust gas flowing in an exhaust passage, to prevent an oxygen sensor installed in the exhaust passage from getting wet, and to improve the durability thereof.SOLUTION: A combustion chamber surrounding water jacket 65 and an exhaust port surrounding water jacket 66 are respectively formed in a cylinder head 31 of an engine, and a cylinder surrounding water jacket 67 and an exhaust passage surrounding water jacket 68 are respectively formed in a cylinder block 30 of the engine. The water jackets are connected so that cooling water taken from a water inlet 61 and introduced into a water supply passage 62 flows through the combustion chamber surrounding water jacket 65, the exhaust port surrounding water jacket 66, the cylinder surrounding water jacket 67 and the exhaust passage surrounding water jacket 68 in this order.SELECTED DRAWING: Figure 4

    【課題】排気通路内を流れる排気が過度に冷却されることによる排気中の水蒸気の凝縮を防止して、排気通路に設置された酸素センサの被水を防止しその耐久性を向上できること。【解決手段】エンジンのシリンダヘッド31には、燃焼室周囲ウォータジャケット65及び排気ポート周囲ウォータジャケット66がそれぞれ形成され、エンジンのシリンダブロック30には、シリンダ周囲ウォータジャケット67及び排気通路周囲ウォータジャケット68がそれぞれ形成され、取水口61にて取り込まれ給水通路62に導かれた冷却水が、燃焼室周囲ウォータジャケット65と、排気ポート周囲ウォータジャケット66と、シリンダ周囲ウォータジャケット67及び排気通路周囲ウォータジャケット68との順に流動するよう、これらのウォータジャケットが接続されて構成されたものである。【選択図】 図4


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    Title :

    COOLING WATER PASSAGE STRUCTURE OF OUTBOARD MOTOR


    Additional title:

    船外機の冷却水通路構造


    Contributors:

    Publication date :

    2016-08-18


    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 / B63H Schiffsantrieb oder Steuerung der Schiffe , MARINE PROPULSION OR STEERING / F01N GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL , Schalldämpfer oder Auspuffvorrichtungen für Gase von Kraft- und Arbeitsmaschinen oder von Kraftmaschinen allgemein / F02F CYLINDERS, PISTONS, OR CASINGS FOR COMBUSTION ENGINES , Zylinder, Kolben oder Gehäuse für Brennkraftmaschinen



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