| 摘要 |
PROBLEM TO BE SOLVED: To provide a new forced air-cooling type engine that can improve fuel consumption by improving cooling efficiency.SOLUTION: An engine 10 includes a crankcase 11, a cylinder block 12, a cylinder head 13, a piston 50, a cooling fan 28, and a shroud 30 equipped with an inner wall part 52 and an outer wall part 54. A suction port 31 is formed at a part which faces the cooling fan 28 of the outer wall part 54. A duct 56 which reaches at least a part of the cylinder block 12 and the cylinder head 13 from the suction port 31 is formed by the outer wall part 54 and the inner wall part 52. |
