Patent ID: 7040262

Claim:
An engine, including: a rotatable flywheel having a flywheel axis and including an undulating cam surface; an expansible chamber device including a piston having a central axis radially spaced from said flywheel axis, said piston abutting said cam surface and movable in a cycle between retracted and extended positions; said cycle including a power stoke from said retracted position to said extended position to urge said piston against said cam surface to thereby rotate said flywheel, and a compression stroke from said extended position to said retracted position in response to said cam surface; and a portion of said undulating cam surface at a certain radius is configured to control at least one engine parameter, including at least one of a compression ratio, a duration of intake stroke, a duration of exhaust stroke, a duration of combustion stroke, a duration of power stroke, a compression stroke pattern, a volumetric efficiency, and a power stroke pattern.