Patent ID: 6119661
Filing Date: 2000-09-19
Classification: F02M

Abstract:
A fuel vapor purge control system for use in controlling flow from a vapor storage canister to an engine intake manifold vacuum port, said system comprising:(a) a main regulator valve having an inlet and outlet including a pressure responsive member forming a moveable wall of a chamber and operable for moving a valve member for controlling flow over a valve seat disposed between said inlet and said outlet;(b) an electrically operated bleed valve having the inlet thereof connected to said canister and the outlet thereof connected to said chamber;(c) a normally closed shut-off valve disposed to have its inlet connected to said chamber and its outlet connected to said vacuum port, wherein upon opening of said secondary valve, said chamber is connected to said vacuum port; and,(d) upon energization of said bleed valve, pressure in said chamber is regulated to affect control of said regulator valve.