초록 ▼

An electric air control switching valve for use in controlling the delivery of secondary air from an engine driven air pump selectively, as a function of both engine operation and the operation of its associated emission control system, to either the exhaust manifold of an engine, preferably at a lo

An electric air control switching valve for use in controlling the delivery of secondary air from an engine driven air pump selectively, as a function of both engine operation and the operation of its associated emission control system, to either the exhaust manifold of an engine, preferably at a location closely adjacent to the exhaust ports of the engine, during low temperature engine operation, to the atmosphere, as at the dirty side of the air cleaner associated with the induction system of the engine, during low temperature engine deceleration, to a converter in the exhaust system for the engine downstream of the exhaust manifold during normal engine operation, or again to the atmosphere, as at the dirty side of the air cleaner, when the converter temperature exceeds a predetermined temperature.

대표청구항 ▼

A fail safe programmable air pump discharge control valve for an engine comprising: a switching valve having an inlet connectable with the air pump discharge and having a primary outlet passage, a converter outlet passage connectable to a catalytic converter, and a plug element movable to selectivel

A fail safe programmable air pump discharge control valve for an engine comprising: a switching valve having an inlet connectable with the air pump discharge and having a primary outlet passage, a converter outlet passage connectable to a catalytic converter, and a plug element movable to selectively obstruct and open the primary outlet passage and the converter outlet passage in accord with actuation of motor elements connected to the plug element; means defining a housing having a passage in communication with the primary outlet, an exhaust passage connectable to the engine exhaust ports to deliver air to said exhaust ports and an air discharge passage to the atmosphere, said housing having a pair of coaxial, facing annular first and second valve seats with said first valve seats encircling said passage; a flat valve located between said valve seats for selective engagement with one or the other, said valve having an aperture means therethrough; actuator means selectively operable to seat said valve on said first valve seat or on said second valve seat; whereby said flat valve in seating engagement with said first valve seat delivers air to the exhaust valve ports and when in seating in engagement with said second valve seat delivers air only to said air discharge passage; and said actuator means including spring means to normally bias said flat valve into seating engagement with said second valve seat.