Method of venting fuel vapor from a tank and system therefor

摘要

In a fuel tank (12) having an electric fuel pump (38) therein, the fuel pump (38) is connected to discharge into a venturi (48) with a throat pressure tap line (52) connected to the bottom of a vapor vent valve (16) fed by spider tubes (56) to the tank vapor dome areas. Venturi throat suction pumps liquid accumulated in the vent valve (16) for discharge through the venturi (48) into the tank (12). A one way valve (54) prevents back flow in the throat pressure tap line (52) to the vent valve (16). Float operated valves (58) are provided on the ends of the spider tubes (56) to restrict fluid flow to the vapor vent valve (16).