Fuel fill system with fuel vapor recirculation
AssigneeDayco Products, Inc.
InventorsRaja Banerjee, Darrell L. Klein
Life of this patent
Estimating the term…
Abstract
A fuel fill system includes 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. Fuel vapor entering the funnel from the vapor recirculation tube is directed toward the outlet port at a first angle less than 90° from a longitudinal axis of the funnel. The fuel vapor entering the funnel may also be directed 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. The second angle being in a plane perpendicular to the longitudinal axis of the funnel.
Claims17
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.
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, in a plane perpendicular to a longitudinal axis of the funnel, the fuel vapor entering the funnel from the vapor recirculation tube is directed at a first angle less than 90° from a line tangent to an inner surface of the funnel at a point where the 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.
A funnel for a fuel fill system, the funnel comprising:
- an inlet port configured to receive a nozzle from an external fuel source;
- an outlet port through which fuel from the nozzle passes to a fuel filler tube;
- and a fuel vapor port configured to direct fuel vapor entering the funnel towards the outlet port;
- wherein the fuel vapor port has a centerline disposed at a first angle less than 90° from a longitudinal axis of the funnel;
- and wherein the fuel vapor port is further configured to direct the fuel vapor entering the funnel at a second angle less than 90° from a line tangent to an inner surface of the funnel at a point where the fuel vapor enters the funnel, the angle being in a plane perpendicular to the longitudinal axis of 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.
A funnel for a fuel fill system, the funnel comprising:
- an inlet port configured to receive a nozzle from an external fuel source;
- an outlet port through which fuel from the nozzle passes to a fuel filler tube;
- and
- a fuel vapor port configured to direct fuel vapor entering the funnel at a first angle less than 90° from a line tangent to an inner surface of the funnel at a point where the fuel vapor enters the funnel, the angle being in a plane perpendicular to a longitudinal axis of 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.
Dependencies are inferred from the claim text.