| 摘要 |
PROBLEM TO BE SOLVED: To provide a structure of passage for a supercharger which can eliminate a complicated structure of piping. SOLUTION: A passage 311 for cooling to guide cooling water to a water jacket of a first supercharger 51 is provided on the inside of a bracket 31, this bracket 31 is provided between an engine block 11 and the first supercharger 51. Cooling water pumped up by a water pump 41A, passing through successively by the order of a grooved part 111B of the engine block 11, the passage 311 For cooling, and a supply water pipe 42 for supercharger, leads to the first supercharger 51. In this way, a number of pipes for guiding the cooling water to the water jacket of the first supercharger 51 can be decreased, additionally a length of the passage 311 for cooling in the supply water pipe 42 for supercharger and the bracket 31 can be minimized so that the piping structure can be simplified.
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