| 摘要 |
PURPOSE:To prevent an exhaust from corroding due to sulfur or the like contained in an exhaust gas and to prevent thermal adverse influences over the external part due to the exhaust pipe by constituting the exhaust pipe into a dual pipe by use of a plurality of reinforced plastic pipes having different diameters. CONSTITUTION:The exhaust pipe of the engine is constituted of an inside pipe 2a and an outside pipe 2b which are made of reinforced plastics. In this case, the outside pipe 2b is constituted to have a diameter as large as possible as compared with the inside pipe 2a and a gap between the outside pipe 2b and the inside pipe 2a is made large. Further, in the case where the exhaust pipe passes the side surface of a fuel tank or the like, the inside pipe 2a is made eccentric to the opposite side of the fuel tank or the like so as to be coupled to the outside pipe 2b. According to this organization, the corrosion of the exhaust pipe due to sulfur or the like contained in the exhaust gas can be prevented and thermal adverse influences of the exhaust pipe over the fuel tank or the like can also be prevented.
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