| 摘要 |
PROBLEM TO BE SOLVED: To provide a technology which can suppress an increase of the number of part items, in an exhaust device having a double pipe composed of an inside pipe and an outside pipe.SOLUTION: In an exhaust device, an exhaust passage 52 is extended from an internal combustion engine, the exhaust passage 52 is formed of an exhaust pipe 47 and a muffler 49 which is connected to a downstream side of the exhaust pipe 47, and a part of the exhaust pipe 47 is formed into a double pipe structure composed of an inside pipe 71 and an outside pipe 72. An outside pipe throttle part 74 which is contracted in an outside diameter compared with the other portion of the outside pipe 72 is arranged at a downstream side of the outside pipe 72, the inside pipe 71 is slidably supported by the outside pipe throttle part 74, and the outside pipe 72 and the muffler 49 are welded to each other in a region in which the outside pipe 72 and the inside pipe 71 are separated from each other in a radial direction.SELECTED DRAWING: Figure 9 |
