Patent ID: 6293234
Filing Date: 2001-09-25
Classification: F02B,F02F

Abstract:
A port-controlled two-stroke engine comprising a combustion chamber, a crankcase containing a combustible mixture, a cylinder having a cylinder wall, a piston working in the cylinder, an intake duct terminating in an intake port, said intake port delivering the combustible mixture to the engine, at least one flywheel rotatively mounted in the crankcase about an axis of rotation, the rotation of the flywheel acting to drive the boundary layer of the combustible mixture immediately adjacent the periphery of the flywheel around the periphery, and a transfer passage extending from a first transfer port in the cylinder wall adjacent said crankcase to a second transfer port opening in the cylinder wall adjacent the combustion chamber, said first transfer port being spaced from said combustible mixture intake port along the periphery of said flywheel, said first transfer port receiving combustible mixture driven by the flywheel and conveying the combustible mixture from the crankcase to the combustion chamber, the flywheel having a plane of rotation which passes through one or more of the first transfer port, transfer passage and second transfer port.