Throttle control device, system, and method

Abstract

An air/fuel control apparatus mounted on a racing automobile engine delivers fuel to the engine. A valve therein controls the flow of fuel to the engine, irrespective of the position of the accelerator foot pedal, and the valve is connected to a throttle linkage linking the pedal to the valve. The valve includes a double acting pneumatic cylinder means with a slidable piston therein. A movable shaft extends through both ends of a cylindrical housing, and moves with the piston. One first end of the shaft is coupled to the valve so that slidable movement of the piston opens and closes the valve to increase and decrease, respectively, flow of fuel to the carburetor of the engine. A cable rod connects the housing to the pedal so that movement of the pedal causes the housing to move with respect to the piston therein. A solenoid valve delivers gas under pressure selectively to one side of the piston to either increase or decrease fuel flow to the engine while at also controlling the rate of gas exhaustion from the opposite side of the piston to control the rate of movement of the piston, thereby to control the acceleration or deceleration of the engine. A second end of the shaft extends out from the opposite end of the housing and has an adjustable limiting member to limit of movement of the shaft in one direction by the limiting member contacting the housing.