| 摘要 |
PURPOSE:To prevent the rising of oil pressure without adversely effecting cooling performance by providing a bypass pipe between an oil inflow passage toward an oil cooler formed in a body with a crank case and an oil cutflow passage there from, and the bypass pipe with an orifice. CONSTITUTION:An oil pump 7 sucks in oil in an oil pan 3 through an oil strainer 5 and a suction pipe 6, and feeds it into an oil filter 9. The oil flows from the oil filter 9 into an oil cooler 11 integrally fixed to a crankcase through the secondary flow passage 10 and an inflow passage 12, and is supplied to an oil gallery 14 through an outflow passage 13. The inflow passage 12 is connected to the outflow passage 18 through a bypass line 15 in which an orifice 16 is provided.
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