Patent ID: 7311089
Filing Date: 2007-12-25
Classification: F02M

Abstract:
1. A high flow purge valve apparatus for a fuel tank ventilation system having an adsorption canister venting a fuel tank, and a canister purge valve connecting the canister to an intake manifold of an internal combustion engine, the high flow purge valve apparatus comprising: a nozzle connected between the canister purge valve and the intake manifold, the nozzle having a pressure tap such that a purge flow from the canister purge valve to the intake manifold creates low pressure in the pressure tap; a diaphragm-operated purge valve connecting the adsorption canister and the engine intake manifold, in parallel to the canister purge valve, a position of a diaphragm in the diaphragm-operated purge valve regulating a flow through the diaphragm-operated purge valve from the adsorption canister to the engine intake manifold; and a connecting passageway between the pressure tap and the diaphragm-operated purge valve, for applying the low pressure of the pressure tap to the diaphragm to change its position.