EXHAUST SYSTEM OF ENGINE

摘要

An exhaust system of an engine includes an exhaust passage for flowing exhaust gas emitted from an engine; a flow rectifier for rectifying the flow of the exhaust gas; and an exhaust heat recovery unit disposed in the exhaust passage downstream of the flow rectifier provided with an exhaust heat recovery portion and a cooling portion to cool the exhaust heat recovery portion. The exhaust system further includes: a first diameter reducing portion gradually reduced in diameter toward the exhaust heat recovery unit from the flow rectifier, and a second diameter reducing portion gradually reduced in diameter toward the downstream from the exhaust heat recovery unit.