Internal combustion engine with rotary valves

Claim 1

An improved internal combustion engine with rotary valves of the type having an engine block supporting a crankshaft, connected through connecting rods to a plurality of pistons in a plurality of cylinders, a cylinder head containing at least one spark plug, wherein the improvement comprises: a single opening located in said cylinder head about centrally positioned above each piston for use as an intake and an exhaust port, said single opening having an inner surface in each said cylinder and an outer surface, said outer surface being arcuate for contact with a rotary valve member; a rotary valve member having a cylindrical side wall with a central axis and an inner surface and an outer surface, the outer surface of said cylindrical side wall mates with the arcuate outer surface of the single opening and a cylindrical inner wall surrounding an inner volume and having an open intake end and an open exhaust end, an intake port formed through the cylindrical side wall, an exhaust port formed through said sidewall spaced from said intake port, a partition positioned within said cylindrical inner wall dividing the inner volume into an exhaust compartment and an intake compartment and said intake port communicating with said intake compartment and said exhaust port communicating with said exhaust compartment and said intake compartment communication with the open intake end and the exhaust compartment communicating with the open exhaust end and said partition extending about the entire distance from the open intake end to the open exhaust end; and means for rotating said rotary valve in a timed manner with said crankshaft so that as the piston moves downwardly in an intake stroke the intake port is passing over said single opening permitting an air fuel mixture to be drawn through said intake end of said rotary valve and into a cylinder, when said piston moves upwardly in a compression stroke, the cylindrical side wall is passing over said single opening, when said piston moves downwardly in a power stroke, the cylindrical side wall is passing over said single opening and when said piston is moving upwardly, the exhaust port is passing over said single opening causing the exhaust gasses to flow out of the exhaust end of said rotary valve member.