Internal-combustion engines – Charge forming device – Having fuel vapor recovery and storage system
Reexamination Certificate
2007-07-13
2008-11-11
Gimie, Mahmoud (Department: 3747)
Internal-combustion engines
Charge forming device
Having fuel vapor recovery and storage system
C123S519000
Reexamination Certificate
active
07448367
ABSTRACT:
A plug-in hybrid vehicle is driven by one or more electric motors powered by a battery system with supplemental electric power provided by a gasoline engine powered generator. A canister, connected by a fuel vapor vent passage, is used to admit and temporarily adsorb fuel vapor from a vehicle fuel tank during refueling. The canister also has a first fuel vapor and air flow passage for venting the canister and introducing ambient air (in the reverse flow direction) for removing vapor stored in the canister during tank refueling. The canister has a second passage for conducting air and purged vapor from the canister to the operating engine. The first and second passages are opened only during engine operation for purging of stored fuel vapor. The first flow passage is selectively opened when the tank is being refueled. The sealed fuel system eliminates diurnal fuel tank vapor generation and canister bleed emissions.
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Mc Carthy Timothy E.
Reddy Sam R.
Gimie Mahmoud
GM Global Technology Operations Inc.
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