Abstract: This invention provides a fuel tank venting system for regulating the discharge of fuel vapors and of liquid fuel from a fuel tank. The fuel tank venting system includes fuel vapor vent tubes that are fully enclosed within the system and exit the fuel tank at a common location. Because the fuel vapor vent tubes are fully enclosed within the system, vent valves are not required at each vent point and permeation resistant tubing is not required. In this fuel tank venting system fuel is prevented from reaching the fuel vapor recovery canister under normal operating conditions and the fuel filler pipe serves as a liquid/vapor discriminator. In another embodiment the vent vapor tube does not extend beyond the highest fuel level in the fuel filler pipe because the fuel filler pipe pressure is lower than the fuel tank pressure due to the fuel filler pipe connectivity to the canister.

Abstract: An exhaust gas recirculation system includes a valve body having an exhaust port adapted for fluid communication with a source of exhaust gas, an intake port adapted for fluid communication with the intake manifold of an internal combustion engine, and a valve member. The system further includes a drive member mounted to the valve body and including a mechanical output which is rotatable in opposed first and second directions. A gear train is operatively disposed between and in engagement with the rotatable mechanical output of the drive member and the valve member. More specifically, the mechanical output rotating in either of the first or second directions imparts linear, reciprocal motion directly to the valve member through the gear train thereby moving the valve member between opened and closed positions to control the flow of exhaust gas from the exhaust port to the intake port.

Abstract: A fuel vapor vent valve for a motor vehicle is connected to an upper wall of a fuel tank in vertically depending relationship. The valve has a cover with a vapor exit passage connected to a fuel vapor storage canister and a body depending from the cover. One embodiment has a vapor exit port that communicates with the fuel tank interior adjacent the upper wall of the fuel tank. A vent tube has one end connected to the vapor exit passage and an opposite end that communicates with the vent exit port and defines a valve seat. The vapor exit port is located with respect to the valve seat so as to separate liquid fuel particles from vapor flow during fuel fill. The valve seat is closed by a valve element attached to a float when the fuel tank is full. Several further embodiments of the valve have the body connected to the cover to accommodate side impacts to the fuel tank.