US Patent 7150443 Control valve for nitrous oxide injection system

A nitrous oxide or fuel control valve has flow control of nitrous oxide from a fluid-delivery aperture (7) or flow control of fuel from a fluid-delivery aperture (8) into a injection nozzle (22) of an intake manifold of an engine by actuation of an adjuster coupler nut (11) with an actuation piston (14) that is actuated with gas pressure from an actuation-pressure source (43) with an actuation on/off valve(25). It can be structured for low-weight, short-term needs for racing and other sports uses or for heavier long-term needs of engines.