Abstract: An air intake manifold comprises a manifold body having a plenum formed with a convexly-curved floor, opposed sidewalls and a radiused inlet which collectively define a plenum interior. A number of air passageways or runners each have an inlet at the plenum interior and an outlet connected to one cylinder of the internal combustion engine where a fuel injector is mounted to combine atomized fuel with the flow of air through such runners. An air guide extends outwardly from the plenum floor in a generally convexly arcuate shape which is effective to smoothly direct the flow of air entering the plenum interior into each of the runners so that turbulence within the runners is substantially reduced thus allowing a maximum amount of air to flow into the cylinders of the engine at both low engine speeds and high engine speeds.

Abstract: An air valve particularly intended for use with air intake manifolds of the type employed with fuel injected, internal combustion enginers, comprising a valve base adapted to be mounted to the plenum of the air intake manifold and a separate valve body sealingly engageable with a seat formed in the valve base. The valve body is formed with a number of inlet bores, each of which carry a rotatable throttle blade, and these inlet bores align with discharge bores in the valve base each having a radiused outlet edge or lip.

Abstract: A combined fuel regulator and single point metering system comprises a diaphragm-type fuel regulator mounted at one end of a single point injector which carries a solenoid valve operated plunger movable with respect to a fuel distribution block located within the hollow interior of the injector base. The injector base is divided into a fuel outlet cavity located on one side of the fuel distribution block, and an air chamber located on the opposite side which is connected by a one-way valve to source of ambient air, and is also adapted for connection to a turbocharger or the like. The fuel distribution block is formed with a number of passages each directly connected to an air-fuel nozzle within which the fuel and air are intermixed for delivery through separate tubes to each of the cylinders of an internal combustion engine.