Auxiliary air valve

Claim 1

A valve device for admitting auxiliary air to the intake manifold of an internal combustion engine comprising: a first body part of double-ended construction having an air inlet passageway therethrough; a valve seat formed on said first body at one end of said air inlet passageway; a port at the juncture of said air inlet passageway and said valve seat; a valve seatable on said valve seat to block air flow through said air inlet passageway; an elongated double-ended stem disposed in said air inlet passageway with one of its ends protruding through said port and fixedly engaging said valve; an abutment adjustably engaging the other stem end adjacent the other end of said air inlet passageway; a spring contained at least partially in said air inlet passageway and engaged between said first body part at said port and said abutment biasing said valve to seat on said valve seat; a second body part having a port and telescopically engaged with said first body part at its valve seat end to form a chamber for said valve, the ports of said first and second body parts constituting inlet and outlet ports, respectively, for atmospheric air flowing into said valve chamber through said air inlet passageway about said spring and out of said valve chamber into said intake manifold, said second body part having an outlet end communicating with its outlet port and connectible to an intake manifold; said valve being movable in said valve chamber between said ports and being resiliently responsive to suction developed in said intake manifold to be drawn towards the outlet port from said inlet port against the bias of said spring; said abutment being adjustable on said other stem end adjacent the end of the air inlet passageway remote from said valve chamber to increase and decrease the bias of said spring to vary the responsiveness of said valve to suction as aforesaid while said valve device is operatively connected to the intake manifold aforesaid.