| 摘要 |
This positive displacement device features relative rotation and translation of a piston (25) and a cylinder (19) where the rotation accomplishes a rotary valve function and the translation accomplishes a change in chamber volume function. The preferred embodiment is a ported single-piston, four-stroke internal combustion engine with one moving part and low emissions, a sinusoidal cam (21) on the cylinder is confined between two fixed cams (20, 22) relative to the generally fixed piston. The cam (21) creates a four-stoke translational movement of the cylinder (19) about the piston (25) for each revolution of the cylinder (19). A transfer port on the cylinder (19) facilitates movement of the intake charge from an intake port (24) on the piston (25) into the combustion chamber where it is compressed, ignited, and then removed by means of the transfer port and an exhaust port on the piston. |
