Patent ID: 7243678

Claim:
A fuel fill system comprising: a funnel having an inlet port configured to receive a nozzle from an external fuel source; a fuel filler tube coupled to an outlet port of the funnel; and a vapor recirculation tube coupled to the funnel, wherein fuel vapor from the vapor recirculation tube enters the funnel through a fuel vapor port, and the fuel vapor port directs the fuel vapor toward the outlet port; wherein the funnel includes a cylindrical portion through which the fuel vapor port is disposed, the fuel vapor port has a centerline disposed at a first angle less than 90° from a longitudinal axis of the cylindrical portion; and wherein, in a plane perpendicular to a longitudinal axis of the funnel, the fuel vapor port further directs the fuel vapor at a second angle less than 90° from a line tangent to an inner surface of the funnel at a point where fuel vapor enters the funnel to introduce a swirl component in the fuel vapor around the inner surface of the funnel, which creates a low pressure region in the funnel to reduce the amount of fuel vapor that escapes the fuel fill system.