OIL SUPPLYING DEVICE OF INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To improve the supplying performance of oil for lubricating and cooling into a piston. SOLUTION: An oil passage 53 is formed in a counter weight part 44 of a crankshaft 4, an exit 503 of the oil passage 5 is opened at a side 44a of the counter weight part 44, and the sufficient oil is supplied to a back of the piston 2 even an oil pump capacity is not so high by injecting the oil at the timing near the lower dead point which the side 44a and the piston 2 approach in the near most state.