Abstract: A complete rotary valve assembly and system is disclosed. The rotary valve includes a generally elongated valve body having first and second ends and a longitudinally extending axis of rotation. The rotary valve is mounted in a housing positioned above a head port of an engine. The rotary valve includes an intake port and an exhaust port defined by a valve body arranged for periodic communication with the head port and combustion chamber as the valve rotates along the axis of rotation. The rotary valve system of the present invention includes a secondary intake port for controlling the flow of intake gases into the rotary valve, a fuel injection system, an improved sealing system, a bifurcated valve body with separated intake and exhaust passages, a cooling and reduced emissions gas exhaust control system, and an adjustable throttle control.

Abstract: A complete rotary valve assembly and system is disclosed. The rotary valve includes a generally elongated valve body having first and second ends and a longitudinally extending axis of rotation. The rotary valve is mounted in a housing positioned above a head port of an engine. The rotary valve includes an intake port and an exhaust port defined by a valve body arranged for periodic communication with the head port and combustion chamber as the valve rotates along the axis of rotation. The rotary valve system of the present invention includes a secondary intake port for controlling the flow of intake gases into the rotary valve, a fuel injection system, an improved sealing system, a bifurcated valve body with separated intake and exhaust passages, a cooling and reduced emissions gas exhaust control system, and an adjustable throttle control.