| 摘要 |
PURPOSE:To reduce the bottom size of a crankcase by forming a recessed part for accumulating oil between the crankcase and a clutch cover covering it, and forming a connecting hole connected to an oil pan on the side face of the recessed part. CONSTITUTION:Lubricant is injected from an injection hole 4a of a pipe 4 to a recessed part 3 formed in a cylinder head 2 of an engine 20, and thereby heat around the combustion chamber is absorbed. The lubricant injected to the recessed part is returned through an exhaust hole 5 and an oil pipe 6 to an oil pan 8 at the bottom of a crankcase 7. In this equipment, the lubricant of the oil pipe 6 is exhausted to a recessed part 21 formed between the crankcase 7 and a clutch cover 11. The oil level in the recessed part 21 thus rises by the lubricant, and the lubricant is returned from a position below the oil level of the oil pan 8 through an oil exhaust hole 21b to the oil pan 8. |
