Patent ID: 6505615
Filing Date: 2003-01-14
Classification: F01M

Abstract:
A device to deoil crankcase ventilation gases of an internal combustion engine with at least one oil mist separator, which has:a gas inlet connected to a first pressure area and connected to a crankcase of the engine; a gas outlet connected to a second pressure area and connected to an air intake section of the engine; an oil outlet connected to an oil sump of the internal combustion engine; wherein; a bypass channel, which has a gas inlet connected to the first pressure area and a gas outlet connected to the second pressure area and with no filter element therein; at least one device which, depending on a pressure difference between the two pressure areas, opens or closes the bypass channel one of continuously and gradually, to allow the crankcase ventilation gases to flow through; when the bypass channel is open, a partial volumetric flow of the crankcase ventilation gas flows past the oil mist separator through the bypass channel into the second pressure area, wherein the bypass channel and the device to open and close the bypass channel are designed so that, when the bypass channel is opened, deoiling in the bypass channel is brought about by at least one of flow diversion and impact separation in the bypass channel and not by means of a filter.