Patent ID: 6601569
Filing Date: 2003-08-05
Classification: F02M,F16K

Abstract:
A system for controlling evaporative emissions of a volatile fuel, the system comprising:a fuel vapor collection canister including a supply port and a discharge port; a purge valve including an inlet port and an outlet port, the inlet port of the purge valve being in fluid communication with the discharge port of the fuel vapor collection canister; an isolation valve including: a housing having a first port in fluid communication with the supply port of the fuel vapor collection canister, a second port, and a fuel vapor flow path extending between the first and second ports; a valve body movable with respect to the housing, the valve body being movable along an axis between a first configuration and a second configuration, the first configuration permitting substantially unrestricted fuel vapor flow between the first and second ports, and the second configuration substantially preventing fuel vapor flow between the first and second ports; and a seal being located at an interface between the housing and the valve body, the seal including an annular lip projecting obliquely toward the axis in the first configuration; a fuel tank being in fluid communication with the second port of the isolation valve; and a vent valve controlling ambient fluid flow with respect to the fuel vapor collection canister.