Patent ID: 8191538
Filing Date: 2012-06-05
Classification: F01M

Abstract:
1. A deaerating and aerating device for a supercharged internal combustion engine, for discharging blow-by gas out of a crankcase of the internal combustion engine, comprising: a first line, which is selectively connected to the crankcase at one end, and which is selectively connected at the other end downstream from a supercharging device of the internal combustion engine to a fresh gas line of the internal combustion engine, and which contains a deaerating valve that is designed so that beyond a predetermined limit value of a pressure difference applied thereto, it limits a volume flow leading to the fresh gas line to a predetermined target value; and a second line, which is selectively connected at one end upstream from the supercharging device to the fresh gas line which is selectively connected at the other end to the crankcase and which contains a throttle device designed, so that at a predetermined target value of a pressure difference applied thereto, it adjusts a volume flow leading to the crankcase; wherein the second line contains parallel to the throttle device a non-return cutoff valve which blocks the flow from the fresh gas line to the crankcase, so that the throttle device forms a bypass that bypasses the non-return cutoff valve, and wherein an opening resistance and a flow-through resistance of the non-return cutoff valve are lower than a flow-through resistance of one of the bypass and the throttle device.