Fuel vapor control system
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United States of America Patent
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May 12, 1998
Grant Date -
N/A
app pub date -
Oct 24, 1996
filing date -
Oct 24, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An electrically controlled vacuum operated valve controls flow of fuel vapors from a collector canister to the engine intake manifold. A pressure regulator controls fuel vapor flow from the canister to the inlet of the electric valve and is normally closed. During engine operation, if the control valve maintains a threshold level of vacuum at the regulator outlet, the regulator will permit fuel vapor flow from the canister to the control valve, otherwise the regulator is closed.
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