Patent ID: 7406961

Claim:
An apparatus for separating oil from crankcase ventilation gases of an internal combustion engine, said apparatus comprising at least two oil separator cyclones connected in parallel through which the crankcase ventilation gases flow, and a control member which divides the volumetric flow of the crankcase ventilation gases into partial streams depending on the size of the volumetric flow and guides the partial streams into at least one of the oil separator cyclones, said control member comprising a control plunger and a compression spring which urges the control plunger against the pressure of the crankcase gases, said control plunger opening or blocking access of the gases to additional cyclones of said at least two oil separator cyclones depending on the dynamic pressure of the crankcase gases, and wherein the access to the at least two cyclones has a cylindrical configuration and contains a mounting pin on which the compression spring is mounted.