Injector carburetor

Claim 1

In an injection carburetion system including a carburetor having a throat on the air intake side thereof, a fuel reservoir, and a fuel pulsing device connected to the carburetor and fuel reservoir to transfer fuel from said reservoir to said carburetor, the improvement that comprises a plurality of injector nozzles arranged in an annular path around said throat, an annular channel around said throat for supplying said nozzles with fuel from said reservoir through said pulsating device, a conduit connecting said annular channel with said pulsing device, a valve by which a portion of the fuel output of said pulsing device is returned to said reservoir, said valve being connected to said annular channel, a spring biasing said valve to a closed position, a rotatable shaft attached to said spring to pivot said spring, a first lever attached to said shaft and having a curved edge, a second lever having a stop on one end thereof which bears against said edge of said first lever, the other end of said second lever being pivotally fixed to the carburetor base, a diaphragm housing positioned on the carburetor, a diaphragm splitting the diaphragm housing into an upper and lower chamber of which the upper one communicates with the carburetor throat immediately below the annular channel and a rod attached at one end to the diaphragm and at the other end to a point intermediate the ends of said second lever, said diaphragm being responsive to a variable of motor performance for modifying the magnitude of the bias imposed by said spring.