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An EGR valve for an engine comprising: a housing including a plurality of passages for communicating exhaust gas and engine vacuum thereto, for supporting a movable diaphragm-piston assembly, a diaphragm-piston assembly for dividing the housing into an atmospheric chamber and a vacuum chamber, inclu

An EGR valve for an engine comprising: a housing including a plurality of passages for communicating exhaust gas and engine vacuum thereto, for supporting a movable diaphragm-piston assembly, a diaphragm-piston assembly for dividing the housing into an atmospheric chamber and a vacuum chamber, including a user cleanable, outwardly movable valve closure element for selectively sealing one of said passages and means for sensing the position of the assembly.

대표청구항 ▼

An EGR valve for an engine comprising: means for mounting said valve to an engine, including an inlet adapted to receive exhaust gas, and an outlet adapted to receive engine vacuum and adapted to communicate said received exhaust gas to the intake of the engine and a valve seat positioned about said

An EGR valve for an engine comprising: means for mounting said valve to an engine, including an inlet adapted to receive exhaust gas, and an outlet adapted to receive engine vacuum and adapted to communicate said received exhaust gas to the intake of the engine and a valve seat positioned about said inlet on an exterior mounting surface thereof; housing means supported by said mounting means including an atmospheric chamber and a vacuum chamber, said vacuum chamber positioned adjacent said mounting means, said housing means including means for communicating vacuum from said mounting means to said vacuum chamber; diaphragm-piston assembly supported by said housing means for dividing said housing means into said atmospheric and vacuum chambers and for balancing the pressure forces resulting from vacuum pressure exerted upon a flexible diaphragm and upon a valve closure element, said assembly comprising: a plate supported at its outer periphery by said housing means, said plate including an opening substantially aligned with said inlet for supporting said flexible diaphragm, said flexible diaphragm having an outer portion supported by said plate about said opening, and a flexible inner portion defining an annular opening, said inner portion being substantially the same size as said inlet; piston means comprising an upper element supported within said annular opening and movable with said inner portion of said diaphragm, a first rod extending from said upper element through said inlet and a valve closure element movable with said first rod away from said exterior mounting surface for seating upon said valve seat; a solenoid assembly responsive to control signals input thereto comprising a movable armature and a second rod extending therefrom for engaging said upper element and for moving said valve closure element outwardly off from said valve seat; biasing means supported within said housing means for urging said piston means into said housing and for urging said valve closure element upon said valve seat. An EGR valve for an engine comprising: housing means for supporting a movable diaphragm-piston assembly comprising a base including an exterior surface adapted to be mounted to the engine, and a plurality of passages for communicating exhaust gas and engine vacuum thereto and a housing, attached to said base, comprising a bottom portion including a plurality of openings therein in directed communication with said plurality of passages, a diaphragm-piston assembly for dividing said housing into an atmospheric chamber and a vacuum chamber, said vacuum chamber being formed between said assembly and said bottom portion, said assembly including a user cleanable, valve closure element outwardly movable beyond said exterior surface for selectively sealing one of said passages at a valve seat, said valve seat formed at the intersection of said one passage and said exterior surface including means, extending beyond said exterior surface, for permitting said valve closure element to be moved outwardly when said valve has been removed from said engine.