To reduce vibration of an engine mount and muffled sound in a vehicle caused by an exhaust pipe in a lock-up state.SOLUTION: An exhaust pipe structure includes: a front bank exhaust pipe 2 connected to an exhaust manifold 13 of a front bank 11 of a V type engine 1 disposed laterally at the vehicle front; a rear bank exhaust pipe 3 connecting an exhaust manifold 14 of a rear bank 12 to the front bank exhaust pipe 2; an intermediate exhaust pipe 4 which is connected to the downstream side of the front bank exhaust pipe 2 and to which a catalyst device 41 is attached; and a rear exhaust pipe 5 which is connected to the downstream side of the intermediate exhaust pipe 4 and to which a muffler 51 is attached. The front bank exhaust pipe 2 and the intermediate exhaust pipe 4 are connected by a ball joint 6, and the intermediate exhaust pipe 4 and the rear exhaust pipe 5 are connected by a ball joint 6. In the front bank exhaust pipe 2, a flexible pipe 22 which may elastically deform is attached to the upstream side of a joint part 21 with the rear bank exhaust pipe 3.SELECTED DRAWING: Figure 1

    【課題】ロックアップ状態での排気管起因のエンジンマウントの振動や車内こもり音を低減する。【解決手段】車両前方に横置き配置されるV型エンジン1のフロントバンク11の排気マニホールド13に接続されるフロントバンク排気管2と、リアバンク12の排気マニホールド14とフロントバンク排気管2とを接続するリアバンク排気管3と、フロントバンク排気管2の下流側に接続されて、触媒装置41が取り付けられる中間排気管4と、中間排気管4の下流側に接続されて、マフラー51が取り付けられる後方排気管5と、を備え、フロントバンク排気管2と中間排気管4はボールジョイント6で接続され、中間排気管4と後方排気管5はボールジョイント6で接続され、フロントバンク排気管2は、リアバンク排気管3との合流部21より上流側に弾性変形可能なフレキシブル管22が取り付けられている。【選択図】図1


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    Title :

    EXHAUST PIPE STRUCTURE


    Additional title:

    排気管構造


    Contributors:

    Publication date :

    2020-10-01


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    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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