Fuel vapor vent assembly with liquid trap
AssigneeBorg-Warner Automotive, Inc.
InventorDavid R. Gimby
Life of this patent
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Abstract
A fuel vapor vent assembly with liquid trap is incorporated in a vent valve mounted on a motor vehicle fuel tank. The vent valve operates to vent the fuel tank through a vertically oriented orifice in the vent assembly when the valve is in a normal upright position and closes the orifice when the fuel tank together with the valve is tipped to a significant degree from this position. An elevated liquid trap is provided in the vent assembly at the outlet of the orifice that traps liquid from the venting fuel vapor while permitting venting to continue therethrough and then drains the trapped liquid back past the valve into the tank when the pressure in the latter is relieved. An insert mounted in the valve body is adapted to define both the orifice and liquid trap.
Claims9
A fuel vapor vent assembly adapted to be mounted in the top of a motor vehicle fuel tank, said assembly comprising a body having an entry passage adapted to be open to liquid fuel and fuel vapor and a vapor exit passage adapted to be connected to a fuel vapor storage device, an insert mounted in said body having a normally generally vertically oriented orifice, said orifice having an entrance and an exit elevated above said entrance, said insert further having a basin extending about said exit of said orifice, and said body having a cavity co-operating with said basin to define an expansive chamber above said exit and connected to said vapor exit passage and adapted to trap liquid fuel from fuel vapor passing under pressure through said orifice before said liquid fuel can reach said vapor exit passage.
Dependencies are inferred from the claim text.