| 摘要 |
PROBLEM TO BE SOLVED: To reduce the cost of an engine by simply structuring an oil passage for lubricating a centrifugal clutch. SOLUTION: A crank case 12 has a crankshaft 13 being rotatingly driven by a piston attached rotatably thereto, and a wet-type centrifugal clutch 43 is provided between the crankshaft 13 and an output shaft 42 arranged coaxially. The crank case 12 is provided with an oil pump driven by the crankshaft 13, and a supply oil passage 62 is formed in the crank case 12 for guiding the lubricant from the oil pump to the crankshaft 13. A lubricant supplying passage 61 is formed on the axial center of the crankshaft 13, and the lubricant pressure fed from the oil pump to the supply oil passage 62 is supplied to the centrifugal clutch 43 via the lubricant supply passage 61. A crank pin lubricant passage 63 is formed in the crank pin 16 for opening the lubricant supply passage 61 on the outer peripheral face of the crank pin 16. COPYRIGHT: (C)2006,JPO&NCIPI
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