| 摘要 |
PROBLEM TO BE SOLVED: To provide exhaust pipe structure for an engine reduced in number of parts and welding portions to reduce cost. SOLUTION: The structure is provided with: first and second manifolds 2, 3 joined respectively to rear end portions of pairs of exhaust pipes 1A to 1D; and a third manifold 4 joined to rear end portions 2d, 3d of the first and second manifolds 2, 3. The first and second manifolds 2, 3 respectively have front end portions 2c, 3c including pairs of inlet ports 2a, 3a to which the rear end potions of the exhaust pipes 1A to 1D are inserted, and rear end portions 2d, 3d including an outlet port 2b and an outlet port 3b. The third manifold 4 has a front end portion 4c including a pair of inlet ports 4a to which the first and second manifolds 2, 3 are inserted, and a rear end portion 4d including an outlet port 4b. The first, second, and third manifolds 2, 3, 4 are press-worked articles made from a single pipe material. COPYRIGHT: (C)2004,JPO&NCIPI
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