EXHAUST SYSTEM FOR ENGINE

PROBLEM TO BE SOLVED: To inhibit deterioration of traveling performance in a high speed operating region when malfunction occurs in an exhaust valve device for controlling a flow rate of exhaust gas supplied to a supercharger, while preventing damage of the exhaust valve device caused by thermal stress in a vehicle mounted with an engine having the supercharger.SOLUTION: An exhaust system for an engine that is interposed between an engine body and a supercharger driven by pressure of exhaust gas discharged from the engine body includes: a first exhaust passage and a second exhaust passage for introducing exhaust gas to the supercharger; a partition wall that is interposed between the first exhaust passage and the second exhaust passage to partition the passages; and a valve that is disposed in the second exhaust passage to control a flow rate of exhaust gas flowing in the second exhaust passage. The partition wall includes a communication section for communicating the first exhaust passage and the second exhaust passage with each other.SELECTED DRAWING: Figure 4 【課題】過給機付エンジンを搭載した車両において、過給機に供給される排気ガスの流量を調節する排気弁装置が熱応力によって破損するのを防止しつつ、その排気弁装置に動作不良が生じた際に高速運転領域における走行性能が損なわれるのを抑制すること。【解決手段】エンジン本体と、当該エンジン本体から排出される排気ガスの圧力により駆動される過給機との間に介設されるエンジンの排気装置であって、過給機に排気ガスを導入する第１排気通路および第２排気通路と、第１排気通路と第２排気通路との間に介在してこれらの通路を仕切る隔壁と、第２排気通路内に配置され、当該第２排気通路を流れる排気ガスの流量を調節するバルブとを備え、隔壁は、第１排気通路と第２排気通路とを連通させる連通部を有する。【選択図】図４