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An internal combustion engine having a head with valve assemblies for controlling intake and exhaust gases to and from piston chambers. A head plate is located between the head and a block having cylinders accommodating pistons. The head plate has openings in communication with the cylinders and val

An internal combustion engine having a head with valve assemblies for controlling intake and exhaust gases to and from piston chambers. A head plate is located between the head and a block having cylinders accommodating pistons. The head plate has openings in communication with the cylinders and valve assemblies. Each valve assembly has a continuous ceramic sleeve having an intake port, and an exhaust port. Rotatably disposed within the sleeve is a rotatable valve body having a valving combustion chamber open to a piston chamber. A spark plug is mounted on each valve body. A ceramic segment seal mounted on the valving body has sealing surfaces engageable with the sleeve. A face seal is located between the head plate and the rotating valve body. The valving body and seal are rotatably driven to sequentially align the valving combustion chamber with the intake port and exhaust port during the operation of the engine.

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A rotary valve assembly for an internal combustion engine comprising: a housing having a bore, a gas inlet passage and a gas outlet passage open to the bore, a continuous cylindrical sleeve means located in said bore, said sleeve means having an inner surface and ports aligned with said passages, ro

A rotary valve assembly for an internal combustion engine comprising: a housing having a bore, a gas inlet passage and a gas outlet passage open to the bore, a continuous cylindrical sleeve means located in said bore, said sleeve means having an inner surface and ports aligned with said passages, rotatable means located within said sleeve means for controlling the flow of gas into and out of the assembly, said rotatable valving means having a valving chamber open to means to accommodate a gas and the inner surface of the sleeve means, said rotatable valving means having a valve body, spark generating means mounted on said body in communication with said valving combustion chamber operable to ignite flue therein, said valving chamber having an inner portion located in the valve body, said valve body having an outer surface spaced from the inner surface of the sleeve means, segment seal means mounted on the valve body for rotation therewith, said segment seal means being engageable with the inner surface of the sleeve means, said segment seal means having a hole aligned with an outer portion of the valving chamber, cooperating pin and slot means on said segment seal means and valve body and allow the segment seal means to move about an axis generally parallel to said inner surface of the sleeve means, biasing means located between the valve body and seal means to hold the seal means to hold the seal means into engagement with the inner surface of the sleeve means, and means operable to rotate said rotatable having means whereby said valving passage sequentially moves into alignment with said ports allowing gas to flow in said inlet and outlet gas passages.