Crank system with sinusoidal piston motion

Abstract From the Canadian patent

A crankshaft system for internal combustion engines built for record rotational or racing, speeds and power because of a pure sinus piston motion low friction and small , size. The system is based on hypocycloid movement but with small diameter of , (eccentric) circular cam driving one- or double-sided piston. The circular cam performs flat motion:, uniform rotation in its own plane plus a straight-line sinusoidal reciprocal movement. It, substitutes a connecting rad and drives the piston directly. A piston skirt and wrist pin are, absent, the piston itself may be double-sided (boxer) in one piece, and , light. Self compensating mechanism maintains high precision of sinus piston motion …