Device to deoil the crankcase ventilation gases of an internal combustion engine

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;
• 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;
• wherein the device to open and close the bypass channel is a valve body charged by a pressure spring, which, below a pre-specified opening pressure difference, is pressed into a closed position by the pressure spring against a valve seat, which is located in the bypass channel, wherein above the pre-specified opening pressure difference the valve body is raised from the valve seat against the pressure spring, thus releasing a flow gap;
• 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 is brought about by at least one of flow diversion and impact separation in the bypass channel;
• and wherein the overall length of the pressure spring can be adjusted in the differential pressureless state.

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;
• 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;
• wherein the device to open and close the bypass channel is a valve body charged by a pressure spring, which, below a pre-specified opening pressure difference, is pressed into a closed position by the pressure spring against a valve seat, which is located in the bypass channel, wherein above the pre-specified opening pressure difference the valve body is raised from the valve seat against the pressure spring, thus releasing a flow gap;
• 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 is brought about by at least one of flow diversion and impact separation in the bypass channel;
• and wherein the end of the pressure spring that is turned away from the valve body is supported on a support element in the bypass channel, wherein the axial distance of the support element from the valve seat can be adjusted.

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;
• 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;
• wherein the device to open and close the bypass channel is a valve body charged by a pressure spring, which, below a pre-specified opening pressure difference, is pressed into a closed position by the pressure spring against a valve seat, which is located in the bypass channel, wherein above the pre-specified opening pressure difference the valve body is raised from the valve seat against the pressure spring, thus releasing a flow gap;
• 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 is brought about by at least one of flow diversion and impact separation in the bypass channel;
• and wherein there is a lift limiter stop which determines the maximum amount by which determines the maximum amount by which the valve body can be raised from the valve seat.

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;
• where;
• a bypass channel, which has a gas inlet connected to the first pressure area and a gas outlet connected to the second pressure area;
• wherein the bypass channel is an integral component of the oil mist separator;
• 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 is brought about by at least one of flow diversion and impact separation in the bypass channel;
• wherein the oil mist separator and the bypass channel are located, together with their respective gas inlets, in a common reception case, which is connected to the first pressure area, wherein the gas outlets of the oil mist separator and of the bypass channel are sealed against the pressure area inside the reception case, out of which they are led into the second pressure area.

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;
• where;
• a bypass channel, which has a gas inlet connected to the first pressure area and a gas outlet connected to the second pressure area;
• 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 is brought about by at least one of flow diversion and impact separation in the bypass channel;
• wherein the bypass channel is directly or indirectly connected to the oil sump via an oil outlet.

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;
• where;
• a bypass channel, which has a gas inlet connected to the first pressure area and a gas outlet connected to the second pressure area;
• 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 is brought about by at least one of flow diversion and impact separation in the bypass channel;
• wherein there is an sensor, which detects whether the bypass channel is open, and which