Patent ID: 6029635
Filing Date: 2000-02-29
Classification: B60K,F02M,Y10T

Abstract:
Fuel vapor emission preventing system for a vehicle having a fuel tank, a fuel filler pipe, a charcoal canister for adsorbing a fuel vapor generated when refueling, an air vent circuit for feeding said fuel vapor to said charcoal canister, comprising:an air vent circuit changeover valve provided in said air vent circuit for changing over from the closed position to the open position so as to feed said fuel vapor to said charcoal canister when the pressure within said fuel tank is higher than atmospheric pressure;a communicating pipe connected with said air vent circuit changeover valve for introducing atmospheric pressure into said air vent circuit changeover valve;a first slanted pipe connected with said communicating pipe and extended obliquely downward to said fuel tank;an intermediate pipe connected with a lower end of said first slanted pipe and provided within said fuel tank;a drain pipe connected with said intermediate pipe and extended downward;a drain hole provided in said drain pipe;a filler pipe connecting pipe connected with said fuel filler pipe for introducing atmospheric pressure; anda second slanted pipe connected at one end thereof with said intermediate pipe, extending obliquely upward and connected at the other end thereof with said filler pipe connecting pipe.