Ventilation line opening/closing means of fuel tank
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United States of America Patent
Stats
-
May 24, 1994
Grant Date -
N/A
app pub date -
Aug 30, 1993
filing date -
Aug 31, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An object of the invention is to improve a ventilation line opening/closing means of a fuel tank which interrupts a ventilation line from the fuel tank to a canister during fuel supply so as to restrict the fuel level when the tank is full, and which opens the ventilation line during traveling of a vehicle. This invention provides a ventilation line opening/closing means of a fuel tank, comprising a float valve provided in a ventilation line for introducing gas of the fuel tank into a canister so as to control ventilation, wherein a fuel receiving portion of return fuel including escape holes is integrally formed on a lower portion of a vent shut-off valve, so that the vent shut-off valve is opened by return fuel from the engine during operation of the engine, and that the vent shut-off valve is closed by the force of a spring during a stop of the engine.
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