| 摘要 |
PROBLEM TO BE SOLVED: To provide an automobile exhaust pipe for achieving a shorter time up to a temperature rise by exhaust gas without increasing a space. SOLUTION: The automobile exhaust pipe 1 includes an exhaust pipe body 10, and a metal cylinder body 20 inserted thereinto, in which an opening is formed at an opening rate of 95% or smaller and which has a plate thickness of 3 mm or smaller. The cylinder body 20 formed of a metal thin plate (1-3 mm) is arranged inside the exhaust pipe body 10 at a predetermined distance therefrom. This avoids an increase of a space which may occur when a heat insulating material is wound on the exhaust pipe body 10 or the exhaust pipe is formed with the exhaust pipe body 10 and a further outside pipe in a double pipe structure. COPYRIGHT: (C)2011,JPO&INPIT
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