Abstract: An ambient air system and pollution control device for an internal combustion engine includes a valve housing having an inlet port for receiving blow by gases from the engine crank case. The housing also includes an ambient air inlet with a flow passageway in the housing in communication with the gas inlet port and with the ambient air inlet. The passageway has a tubular filter at its downstream discharge end so that gases and ambient air may mix in the passageway and be filtered before being discharged from the housing through an outlet port.

Abstract: A fuel management system for reducing pollution when an internal combustion engine is at idle includes a flow control valve located between the fuel tank and the float bowl of the carburetor to reduce the amount of fuel entering the carburetor. A pump is also provided between the fuel tank and the float bowl for removing the existing fuel from the float bowl and conveying it back to the fuel tank when the engine is at idle. The flow control valve in its reduced flow state and the pump are inactivated until the engine reaches a predetermined pressure at which time the existing fuel would be removed by the pump from the float bowl and the flow control valve would permit only a reduced flow of fuel to be conveyed to the float bowl sufficient to keep the engine running.