Patent ID: 8020540
Filing Date: 2011-09-20
Classification: F01M

Abstract:
1. A crankcase ventilation apparatus of an internal combustion engine of a motor vehicle, comprising an oil-mist separator for the separation of oil from the crankcase ventilation gas of the internal combustion engine and comprising an assembly for the return of lubricating oil from the oil-mist separator to an oil pan of the internal combustion engine, wherein the oil-mist separator comprises at least one preliminary separator and at least one fine separator, wherein the preliminary separator is connected to the oil pan via a first oil return flow passage allowing a continuous flow of oil therethrough during operation and wherein an oil collection chamber is provided downstream of an oil outlet of the fine separator, said oil collection chamber being connected to the oil pan via a second oil return flow passage which is equipped with a check valve to discontinue the flow of oil during operation, comprising: the first oil return flow passage is designed in the form of a siphon comprising a pipe section which immerses into a siphon reservoir comprising an overflow, and the second oil return flow passage ends in the siphon reservoir downstream of the check valve.