Abstract: A pollution control device for an internal combustion engine that provides the combined functions of metering the flow of gases from the crank case ventilation system to the engine induction system, providing at preselected times a vacuum control signal to the vacuum advance circuit of the distributor and providing a vacuum control signal to the exhaust gas recirculation valve of the engine. These three functions are provided by a single valve member the position of which is controlled by the induction system vacuum. A separator is provided between the valve and the discharge end of the crank case ventilation system to remove carbon and other particles and to condense a substantial portion of the oil vapors before these undesirable components are transmitted to the valve.

Abstract: A pollution control device for an internal combustion engine that provides the combined functions of metering the flow of gases from the crank case ventilation system to the engine induction system, providing at preselected times a vacuum control signal to the vacuum advance circuit of the distributor and providing a vacuum control signal to the exhaust gas recirculation valve of the engine. These three functions are provided by a single valve member the position of which is controled by the induction system vacuum. A separator is provided between the valve and the discharge end of the crank case ventilation system to remove carbon and other particles and to condense a substantial portion of the oil vapors before these undesirable components are transmitted to the valve.