INTERNAL COMBUSTION ENGINE

摘要

A hyper-expansion internal combustion engine operable using a cycle having expansion, exhaust, intake and compression phases comprising at least one pair of opposed pistons which reciprocate in cylinder portions which are in fluid communication with each other via a common combustion chamber, the pistons being coupled to respective cam elements engaged with a common output shaft for converting the reciprocating motion of the pistons into rotational motion, the cylinder portions having intake and exhaust ports in the cylinder walls arranged such that each intake port is engaged by one piston and each exhaust port is engaged by the respective opposed piston; and the cam elements are provided with different cam profiles which are arranged to cause the respective pistons to uncover the respective exhaust and inlet ports so as to produce a sufficient increase in the effective volume of the expansion phase with respect to the intake phase to give hyper-expansion.