Patent ID: 7509950

Claim:
System for ventilating an internal combustion engine crankcase, comprising bores integrated in a cylinder head cover and ventilation pipes connected thereto for removing blow-by gas, a vacuum source operatively connected to the ventilation pipes and at least one separation module is provided for pre-separation of oil from the blow-by gases, wherein the at least one module has an oil separation chamber constructed therein which has a first opening for the introduction of the blow-by gases and second openings for return of the separated oil into the cylinder head, relative to a longitudinal dimension of the oil separation chamber the first opening is arranged essentially centrally, and the second openings are provided at two respective ends of the oil separation chamber adjacent to respective ends of the cylinder head cover, and the at least one separation module is arranged on the engine crankcase such that the longitudinal dimension of the oil separation chamber is parallel to a longitudinal dimension of a vehicle in which the engine crankcase is mounted.