Patent ID: 7617851

Claim:
A fuel vapor recovery system for a fuel tank of a vehicle utilized when refueling the vehicle from a remote refueling pump having a refueling nozzle, the fuel vapor recovery system comprising: a vapor storage canister with an inlet communicating with a vapor dome in the fuel tank to receive fuel vapor from the tank when refueling the fuel tank; a fuel fill pipe having an inlet adjacent one end and an outlet distal from the inlet and communicating with the fuel tank, and having an inlet cavity adjacent the one end of the fill pipe, open to the exterior of the fill pipe to enable receipt of a refueling nozzle, and defined by a continuous wall and an aperture communicating through the continuous wall; a restrictor plate engaged circumferentially to the continuous wall in the inlet cavity and downstream of the aperture, the restrictor plate having a hole through the restrictor plate sized for close receipt of the refueling nozzle; the continuous wall of the fill pipe having a generally conically shaped region downstream of the restrictor plate and adjacent the fuel outlet of the refueling nozzle when received in the fill pipe for funneling liquid fuel and creating a dynamic liquid seal during refueling; a breathing orifice through the restrictor plate and separate and spaced from the hole for receipt of the refueling nozzle, the aperture being upstream of the restrictor plate and the breathing orifice; and a vapor recirculation tube communicating between the vapor dome in the fuel tank and the inlet cavity via the aperture upstream of the restrictor plate and the breathing orifice so that a portion of the fuel vapor in the fuel tank is routed through the recirculation tube and the aperture and flows in a downstream direction through the breathing orifice and is entrained into the liquid fuel flowing through the outlet of the fill pipe during refueling.