Patent ID: 7077111

Claim:
A variable purge orifice assembly for an evaporative emission system of a vehicle comprising: a housing for fluid connection to a vapor canister and a purge solenoid of the evaporative emission system, said housing having a purge orifice therein and a substantially constant diameter guide passageway extending therethrough; and a regulating device connected to said housing and for connection to an engine of the vehicle, said regulating device being actuated by manifold vacuum from the engine to vary flow of fuel vapor through said purge orifice from the vapor canister to the purge solenoid, said regulating device including a movable pintle disposed within said guide passageway, wherein said purge orifice comprises at least one radially tapered slot extending axially through said housing and radially outwardly from said guide passageway, said slot and pintle coacting to define said purge orifice.