Fluid handling – Diverse fluid containing pressure systems – Fluid separating traps or vents
Patent
1997-12-01
2000-11-14
Michalsky, Gerald A.
Fluid handling
Diverse fluid containing pressure systems
Fluid separating traps or vents
137 43, F16K 2404
Patent
active
061455326
ABSTRACT:
A high flow rate fuel vapor vent valve assembly has a delayed fall away fill level control float responsive to the level of fuel in the fuel tank and constructed to control the closing of an outlet passage through which fuel vapors are vented from the fuel tank when a desired maximum fuel level is reached within the fuel tank during refueling of the tank. The fill level float is constructed to sink after refueling of the fuel tank is completed, and preferably several minutes thereafter, to control the opening of the outlet passage and permit fuel vapors to once again vent from the fuel tank. Staggered openings in the housing of the valve assembly permit the fuel vapor to vent from the fuel tank through the outlet passage when it is open but prevent splashing or sloshing fuel within the fuel tank from flowing through the outlet passage and to a vapor canister downstream of the outlet passage. During filling of the fuel tank when the outlet passage is severely restricted or closed, the pressure within the fuel tank increases to cause fuel to rise in the fill pipe and actuate the automatic shut-off of a refueling nozzle of a fuel station fuel pump and prevent substantial additional fuel from being added to the fuel tank.
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Oberheide G. Clarke
Tuckey Charles H.
Michalsky Gerald A.
Walbro Corporation
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