Patent ID: 7866356
Filing Date: 2011-01-11
Classification: B01D,B60K,B67D,F02M

Abstract:
1. A vapor emission control system for an engine fuel tank having a filler tube with an upper end for receiving a refueling nozzle comprising: a fuel level indicator in the tank operable to provide an electrical fill limit signal indicative of a predetermined level of fuel in the tank; a reservoir connected to receive fuel vapor from the tank; a flexible seal disposed in the filler tube upper end for sealing about the nozzle when the nozzle is received therein; a fuel cap sensor disposed in the filler tube and operable to provide a cap status signal indicating when a fuel cap is off the filler tube; a fill controller operable to provide an electrical shut-off signal upon receipt of the electrical fill limit signal at the predetermined level and the cap status signal indicating that the cap is off the filler tube; an electrically operated shut-off valve operatively connected for controlling vapor flow from the tank to the upper end of the filler tube and operative upon receipt of the shut-off signal for restricting vapor flow to the upper end of the filler tube to activate an automatic nozzle shut off, wherein the shut-off valve includes a seal having a control opening that allows restricted vapor flow between the fuel tank and the vapor storage device when the shut-off valve is closed.