Patent ID: 7111603

Claim:
A multiple cylinder internal combustion engine including: a piston, a crankshaft, a connecting rod connecting said piston to said crankshaft, a cylinder head, a combustion chamber defined as the area between the piston and the cylinder head, a bore in the cylinder head, the bore being perpendicular to each cylinder and parallel to the cylinder bank, a rotary valve system provided in said bore, said rotary valve system containing a solid cylindrical shaft, and a cylindrical tube fixedly attached to the outside of said shaft, said shaft including a helical intake groove and a helical exhaust groove along the surface of the outside diameter, said helical intake groove and said helical exhaust groove being independent of one another, said cylindrical tube having multiple openings to allow fluid communication between the combustion chamber and the helical intake and exhaust grooves, and allowing the fluid communication during the proper intervals of a combustion cycle, multiple intake/exhaust ports in said cylinder head, each individual intake/exhaust port providing fluid communication between a corresponding combustion chamber and said rotary valve system, the length of the helical intake groove being continuously supplied with an air/fuel mixture via a single air entry port, the length of the exhaust helical groove being sequentially filled via a corresponding intake/exhaust port opening and expelled through a single exhaust exit port, the helical intake groove and the helical exhaust groove being aligned on the shaft so as to be distanced from the intake/exhaust port during a compression phase of the combustion process.