Patent ID: 6994067
Filing Date: 2006-02-07
Classification: F01L,F02B,F02D,Y02T

Abstract:
1. A rotary valve internal combustion engine, said engine comprising a crankshaft, a cylinder head, a combustion chamber, and at least one rotary valve, said rotary valve having an inlet port and an exhaust port, each terminating as an opening on the periphery of said rotary valve, said cylinder head having a bore in which said rotary valve rotates, a window in said bore communicating with said combustion chamber, said openings successively aligning with said window by virtue of said rotation, and a drive mechanism comprising a phase change means, said drive mechanism driving said rotary valve, said phase change means applying a phase change in response to change in the operating conditions of said engine, said phase change occurring over at least one cycle of said engine, characterized in that the magnitude of said phase change over the range of operating conditions of said engine is greater than 15°.