INTERNAL COMBUSTION ENGINE OIL SEPARATOR

摘要

PROBLEM TO BE SOLVED: To realize both the capture performance and pressure loss of an oil separator at high level. ! SOLUTION: An oil separator 1 provided in a cylinder head cover of an internal combustion engine includes a partition wall 27 that is provided between a blow-by gas inlet 24 and a blow-by gas outlet 25 and that is penetrated by a plurality of passage holes 30, and blow-by gas transformed into a high-speed blow-by gas flow in the passage holes 30 collides against an adjacent collision plate 32. A slit opening portion 33 is formed between a lower end 32a of the collision plate 32 and a bottom surface of a separator chamber 23, and separated oil is discharged through a drain pipe 35. The collision plate 32 includes a fiber material layer 41 that serves as a front surface opposed to the passage holes 30; and a mesh member 42 that serves as a rear surface and that supports this fiber material layer 41. Most of the high-speed blow-by gas flow exiting the passage holes 30 passes through the fiber ma