Apparatus for spray injection of liquid or gas

An injection billet for an internal combustion engine that includes a manifold and a carburetor, for injection of a primary fuel/air mixture into each throttle bore of the manifold having at least one throttle bore, and for injection of a secondary fuel thereinto for admixture with the primary fuel, comprising:

• a lower plate associated with the primary fuel/air mixture and an upper plate associated with the secondary fuel, defining an assembly, the assembly having at least one circular aperture therethrough aligned with each respective throttle bore and adapted to be interposed between the carburetor and the manifold;
• the lower plate including an inlet port for the primary fuel/air mixture, and a runner in fluid communication with the inlet port and extending to an array of spaced apart primary injection gates about each of the at least one circular apertures of the assembly;
• the upper plate including an inlet port for the secondary fuel, and a runner in fluid communication with the inlet port and extending to an array of spaced apart secondary injection gates about each of the at least one circular apertures of the assembly, the runners and gates of the lower and upper plates being isolated from each other;
• the secondary injection gates of the upper plate being associated with respective ones of the primary injection gates of the lower plate and positioned directly thereabove defining associated gate pairs;
• and the secondary injection gates each defining a discharge angle for the secondary liquid directed into and distinctly downwardly toward a center of the throttle bore associated with each of the at least one circular apertures while the primary injection gates each discharge the primary fuel into an atomized spray plume of secondary liquid discharged from the associated secondary injection gate, whereby the primary fuel is also atomized and induced into and toward the center of the throttle bore.