STRUCTURE OF BLOWBY GAS PASSAGE

摘要

PROBLEM TO BE SOLVED: To further reduce the carry-away of a lubricant accumulated in an oil pan to an intake passage.SOLUTION: In a region at a middle of a blowby gas passage 6 which makes an internal chamber in which a blowby gas is accumulated and an intake passage communicate with each other, there is arranged an oil return part 64 which is arranged at an entire periphery or a substantially-entire periphery of an inside face of the blowby gas passage 6, and inwardly protruded compared with a region immediately below the region at the middle. By this constitution, the carry-away of a lubricant accumulated in an oil pan to the intake passage can be further reduced.