On-board refueling vapor recovery system
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United States of America Patent
Stats
-
Aug 31, 1999
Grant Date -
N/A
app pub date -
Apr 30, 1998
filing date -
Apr 30, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An on-board refueling vapor recovery system for a motor vehicle comprising a fuel tank constructed to store a quantity of liquid fuel. A nozzle-receiving portion has a nozzle-receiving opening fluidly communicated with the fuel tank. Closure structure is constructed to be moved into closing engagement with the nozzle-receiving portion to close the nozzle-receiving opening. An exhaust passage communicates the fuel tank to an atmosphere outside of the motor vehicle to thereby allow fuel vapor to vent from the fuel tank to the atmosphere. The exhaust passage includes a filtration device communicated with the fuel tank to filter environmentally harmful elements from the fuel vapor as it vents from the fuel tank to the atmosphere. A closure structure sensing device is configured to transmit electric signals based on whether the closure structure is in closing engagement with the nozzle-receiving portion. A valve control unit is configured to control whether the valve is opened or closed. The control unit is responsive to the electric signal from the closure sensing device and to a signal from the motor vehicle indicating whether the motor vehicle ignition has been activated.
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