PROBLEM TO BE SOLVED: To enable heat got from an exhaust muffler and a catalyst device to be effectively shut off without making any complex structure at a vehicular internal combustion engine in which the exhaust muffler to cause exhaust gas discharged out of a cylinder head to be guided extends in a vehicle width direction and arranged at a rear part of a vehicle frame.SOLUTION: A catalyst device 54 connected to an exhaust muffler 55 from a front side thereof in a substantial T-shape as seen from a top plan view is disposed between an exhaust pipe 53 and the exhaust muffle 55, a reinforcing cover 75 having one end fixed to an upstream end of the catalyst device 54 covers the catalyst device 54 with the other end being fixed to the exhaust muffler 55, an extending-out part 81b extending up rearward along an outer periphery of the exhaust muffle 55 is integrally formed at the rear part of a first heat shielding member 81 covering the reinforcing cover 75 from above, and a second heat shielding member 88 integrally having a rearward upwardly inclined cover part 88a covering the extending-out part 81b from above is arranged to cover the exhaust muffler 55 from above.SELECTED DRAWING: Figure 5

    【課題】シリンダヘッドからの排気ガスが導かれる排気マフラーが、車幅方向に延びて車体フレームの後部に配設される車両用内燃機関において、排気マフラーおよび触媒装置からの熱を、複雑な構造となることを避けて効果的に遮熱可能とする。【解決手段】排気管53および排気マフラー55間に、排気マフラー55にその前方から平面視で略T字状に接続される触媒装置54が設けられ、触媒装置54の上流端部に一端部が固定されて触媒装置54を覆う補強カバー75の他端部が排気マフラー55に固定され、補強カバー75を上方から覆う第1の遮熱部材81の後部に排気マフラー55の外周に沿って後上がりに延びる延出部81bが一体に形成され、延出部81bを上方から覆って後上がりに傾斜したカバー部88aを一体に有する第2の遮熱部材88が、排気マフラー55を上方から覆うように配置される。【選択図】 図5


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    Titel :

    EXHAUST SYSTEM STRUCTURE IN VEHICULAR INTERNAL COMBUSTION ENGINE


    Weitere Titelangaben:

    車両用内燃機関における排気系構造


    Beteiligte:
    MAHIRA HIROSHI (Autor:in) / AKAGI TAKASHI (Autor:in) / HODOZUKA MAKOTO (Autor:in)

    Erscheinungsdatum :

    2016-05-09


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Japanisch


    Klassifikation :

    IPC:    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 / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES



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