Patent ID: 8485164

Claim:
A crankcase ventilation oil mist separator system, comprising: a first separator unit, which has at least one filter body arranged in a blow-by gas path that blow-by gas flows through the body; a second separator unit which is arranged in a bypass path that bypasses the first separator unit; and a bypass valve having a valve element which opens the bypass path when a differential pressure in the first separator unit exceeds a predefined value, wherein the second separator unit is an impactor separator; wherein the impactor separator has an inner tube and an outer tube arranged coaxially thereto; wherein the valve element is adjustably arranged on the outlet side of the inner tube for opening the bypass path through the outlet side of the inner tube; wherein the impactor separator and the bypass valve form a structural unit, which is pre-assembled and inserted in the pre-assembled state into the oil mist separator; wherein the outer tube has a fleece body arranged on an inner side facing the inner tube.