Oil separator of internal combustion engine

摘要

In an oil separator (1) provided in a cylinder head cover (7) of an internal combustion engine and equipped with a partition wall (27) disposed between a blow-by gas inlet (24) and a blow-by gas outlet (25) and having through holes (30) each serving as an orifice for increasing a flow velocity of blow-by gas flow, a collision plate (32) is arranged adjacent to the partition wall (27) so as to be opposed to each of the through holes (30), for separating oil mist from blow-by gases. At least one upstanding wall (41) is disposed downstream of the collision plate (32) in a manner so as to be adjacent to an opening (33) defined between a lower end of the collision plate (32) and the bottom face of a separator chamber (23), for recapturing oil mist, once-separated from the blow-by gases but rescattering along with the blow-by gas flow passing through the opening (33) of the collision plate (32).