Patent ID: 6691664
Filing Date: 2004-02-17
Classification: F01L

Abstract:
In an internal combustion engine having a cylinder encasement formed with one or more cylinders and one or more intake ports and an exhaust ports for each cylinder, an improved rotary valve system for said engine comprising of two rotary valve shafts which are contoured to essentially match the shape of the substantially hemispherical shaped cylinder head chambers which are encased in a horizontally split head, one shaft for the intake ports and one shaft for the exhaust ports and each rotary valve shaft contains one or more transverse bores for each engine cylinder such that when the rotary valve shafts are rotated the ports formed by these bores become aligned with their respective intake and exhaust passages from the cylinder head into the substantially hemispherical combustion chamber allowing the air/fuel mixture to pass into and out of said combustion chamber and when the rotary valve shafts are rotated such that these transverse ports are perpendicular to the intake or exhaust passages from the head to the combustion chamber the chamber is sealed by the solid portion of rotary valve shafts against their respective combustion chambers seals and the timing of said rotary valve shafts is mechanically synchronized with the engine crankshaft and further the timing of the intake and exhaust rotary valve shafts relative to the engine crankshaft is individually variable through the action of individual hydraulic servo motors and helical gear drive mechanisms attached to each rotary valve shaft under the control of a computerized engine management system that advances or retards the rotary valve shafts relative to the crankshaft through the action of the helical gears and splined shaft rotating the rotary valve shafts.