Internal-combustion engines – Charge forming device – Having fuel vapor recovery and storage system
Patent
1985-03-28
1986-07-08
Greenlief, Magdalen Y. C.
Internal-combustion engines
Charge forming device
Having fuel vapor recovery and storage system
123549, 55208, 55267, F02M 3302, F02M 3112
Patent
active
045986860
ABSTRACT:
A device for the recovery of fuel vapors originating in the fuel system of a vehicle, particularly at the gas tank thereof or in the carburetor float bowl. In one arrangement, a fuel vapor line connects the fuel tank to an input port of a fuel vapor storage and recovery canister containing activated carbon or charcoal, with another port thereof, referred to as a "purge" port, being connected with either the engine intake manifold or else a vacuum port of the carburetor. Carried by the canister is a self-regulating electric heater assemblage adapted to heat air flowing into the canister through a large air port, thereby to also heat the charcoal. When the vehicle is idle, fumes from the gasoline tank can enter the input port of the canister to be adsorbed and stored by the charcoal. When the vehicle is operated, vacuum from the intake manifold draws air into the canister, causing the heated charcoal to release its stored fuel which is then burned in the engine. The heating action hastens the release of the stored fuel from the charcoal. Otherwise at low temperatures this release would occur very slowly. The end result is less pollution emitted into the atmosphere from the vehicle's fuel system.
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Lupoli Peter J.
Mattis Donald J.
Miller Robert S.
Berlow Cynthia
Bittman Mitchell D.
Casco Products Inc.
Greenlief Magdalen Y. C.
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