Patent ID: 6655403
Filing Date: 2003-12-02
Classification: B60K,F02M,Y10T

Abstract:
A system for venting fuel vapor from a vehicle engine fuel tank of the type having the upper wall thereof configured to a plurality of different levels comprising:(a) a first vapor vent valve having an inlet and outlet disposed within the tank at a first of said plurality of levels of the upper wall; (b) a second vapor vent valve having an inlet and outlet disposed within the tank at a second of said plurality of levels of the upper wall; (c) a storage reservoir disposed remotely from the tank and operably connected for preventing escape to the atmosphere of fuel vapor and adapted to flow vapor to the engine air inlet during engine operation; (d) a first conduit connecting the outlet of said first vent valve and the outlet of said second vent valve, wherein said first conduit passes under a third of said plurality of levels lower than said first and second levels; (e) a drain valve disposed in said first conduit and operative to drain liquid fuel trapped in the first conduit to the tank when the fuel level therein descends below said third level; and, (f) a second conduit connecting said first and second vent valve outlets to said reservoir.