| 摘要 |
PROBLEM TO BE SOLVED: To provide a blow-by gas reduction device of an engine, capable of preventing oil lubricity from deteriorating by excessively decompressing the inside of a crank case.SOLUTION: In a blow-by gas reduction passage 26, a one-way valve 27 for allowing only flow from a crank case 3 to an intake passage 18 is provided, and on the upstream side of the one-way valve 27 of the blow-by gas reduction passage 26, a relief valve 45 in which outside air inflows when a negative pressure in the crank case 3 exceeds a prescribed value is provided. |
