Abstract: Provided herein are rotary valve assemblies, engines, and corresponding methods. A rotary valve assembly may include a valve housing defining a cylindrical bore, an inlet, and an outlet. The valve assembly may further include an intake assembly and a throttle assembly arranged concentrically within the cylindrical bore of the valve housing, and the intake assembly and the throttle assembly may rotate independently of one another with respect to a longitudinal axis. During operation of the rotary valve assembly, the valve housing may permit fluid to enter the cylindrical bore of the valve housing via the inlet, the intake assembly may rotate to permit the fluid to flow through the at least one intake inlet port and the at least one throttle inlet port into the throttle body, and the intake assembly may permit the fluid to flow to the outlet from the throttle body.

Abstract: Provided herein are rotary valve assemblies, engines, and corresponding methods. A rotary valve assembly may include a valve housing defining a cylindrical bore, an inlet, and an outlet. The valve assembly may further include an intake assembly and a throttle assembly arranged concentrically within the cylindrical bore of the valve housing, and the intake assembly and the throttle assembly may rotate independently of one another with respect to a longitudinal axis. During operation of the rotary valve assembly, the valve housing may permit fluid to enter the cylindrical bore of the valve housing via the inlet, the intake assembly may rotate to permit the fluid to flow through the at least one intake inlet port and the at least one throttle inlet port into the throttle body, and the intake assembly may permit the fluid to flow to the outlet from the throttle body.

Abstract: The current invention is a high speed, two-stroke engine that is counter flow, semi-uniflow, or uniflow and is comprised of at least one variable rotary valve mechanism.