Separator for use in cylinder head cover of engine to separate oil mist from blow-by gas, has water repellent and oil-repellent process surface formed in collision part, and collision part colliding gas flow of orifice

摘要

The separator (11) has a gas channel (16) flowing oil-mist containing gas. An orifice (24) accelerates gas flow of the gas channel. A collision part (25a) is provided in a downstream of the orifice to collide the gas flow of the orifice. A water repellent and oil-repellent process surface (27) is formed in the collision part. A hydrophilic and lipophilic process surface (28) is provided in circumference of the collision part. A protrusion is protruded from the hydrophilic and lipophilic process surface.