System and method for controlling fuel vapor emission in a...

Details System and method for controlling fuel vapor emission in a... System and method for controlling fuel vapor emission in a...

2007-06-05

2007-06-05

Moulis, Thomas (Department: 3747)

Internal-combustion engines

Charge forming device

Fuel flow regulation between the pump and the charge-forming...

C123S519000

Reexamination Certificate

active

11088489

ABSTRACT:
A small engine fuel system has a tank with an integrally formed filler tube having the lower end located at a level below the upper portion of the tank wall which is formed of vapor impermeable material which may include HDPE interspersed with EVOH or polyamide. In one exemplary embodiment the filler neck is disposed in a depression in the upper portion of the tank wall; and in another exemplary embodiment the filler tube has an insert which extends into the tank to a position below the upper portion of the tank wall to form a vapor space. The tank includes a fill limiting vapor vent/tipping valve with its outlet connected to a storage canister which outputs to the engine and which has an atmospheric air vent.

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