Vent control valving for fuel vapor recovery system
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United States of America Patent
Stats
-
Sep 22, 1998
Grant Date -
N/A
app pub date -
Nov 29, 1995
filing date -
Nov 29, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Vent control valving is described for an automotive fuel vapor recovery system, in which a baffle arrangement prevents or otherwise restricts liquid fuel from entering a vent passage to a charcoal canister. A sealing arrangement prevents or otherwise restricts the escape of fuel when the vehicle is turned at a sufficient rate of turn, operated on a sufficient incline, or rolled over, and prevents overfilling of the tank, which could allow liquid fuel to enter the vent passage. In one embodiment, a differential pressure is developed across a diaphragm during refueling which unseats the diaphragm from a seat to allow unrestricted venting during refueling, restricted venting is established whenever the diaphragm is seated to limited the flow of vapors to the canister.
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Family
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