Internal-combustion engines – Charge forming device – Having fuel vapor recovery and storage system
Patent
1994-05-02
1995-04-25
Wolfe, Willis R.
Internal-combustion engines
Charge forming device
Having fuel vapor recovery and storage system
123520, 123198D, F02M 3302
Patent
active
054089760
ABSTRACT:
An apparatus and method for use in diagnosing an evaporative emission canister collection and purge system. An EVAP system of a vehicle can be diagnosed through the use of a swellable adsorbent disposed in the system's canister. The swellable adsorbent is expandable upon adsorption of fuel vapors and contractible upon desorption. By sensing the expansion and contraction response, a diagnostic mechanism can determine whether the vapor collection and purge functions are operating properly.
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General Motors Corporation
Moulis Thomas N.
Sedlar Jeffrey A.
Wolfe Willis R.
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