Valve for controlling the flow of combustion gases in a combustion engine

Claim 1

A valve for controlling flow of combustion gases of an internal combustion engine, said valve comprising a tubular member communicating at opposite ends with an intake manifold and a gas outlet of the engine respectively; a housing having an interior space; valve means having a slidable valve member movable across said tubular member between said opposite ends thereof between an open position permitting flow of combustion gases from the gas outlet into the manifold and a closed position preventing such flow, said valve means including a valve rod extending with one end into said interior space; at least one flexible diaphragm subdividing said interior space into two chambers and being fixed to said one end of said valve rod, one of said chambers communicating with the atmosphere; a first conduit communicating at one end with the other chamber and at the other end with the manifold; a second conduit communicating at one end, spaced from and substantially aligned with said one end of said first conduit, with said other chamber, and at the other end with the atmosphere; and an electromagnetic valve for alternatively closing said one end of one of said conduits while opening said one end of the other of said conduits and vice versa, said electromagnetic valve being arranged in said other chamber, coaxially with said valve rod and having an armature in form of a leaf spring fixed at one end to said housing and having a free end portion located between said one end of said first conduit at said one end of said second conduit, and sealing material provided on said free end portion for sealingly engaging the one end of the respective conduit.