Abstract: An internal combustion engine enabling asymmetric port timing has an engine mechanism including a crankshaft having a crankpin to which each piston of an opposed pair of pistons is connected and by which the pistons are reciprocatable in a respective one of axially inline cylinders. The mechanism also includes a crosshead having opposite ends on each of which a respective piston is mounted, and a coupling between the crosshead and the crankpin by which the pistons are caused to oscillate circumferentially as the pistons are driven to reciprocate.

Abstract: An internal combustion engine has a mechanism, through which movement of a piston can be transferred to a crankshaft, from a first con rod on which the piston is mounted. The mechanism has an oscillating device mounted on a crankcase of the engine for oscillating on a first axis parallel to the crankshaft axis. The oscillating device is connected to a second con rod connected to the crankshaft for relative rotation on a second axis parallel to the first axis, and also to the first con rod for rotation on a third axis parallel to the first and second axes. The oscillating device is connected to the con rods so that the first axis and the crankshaft axis are on opposite sides of the piston axis, to enable adjustment of piston reciprocation.

Abstract: A rocking mechanism, through which linear reciprocating movement of a piston in a cylinder of an internal combustion engine can be transferred, from the remote end of a con rod on which the piston is mounted to a crankshaft, includes an oscillating device and a mounting device by which the oscillating device is mountable on a crankcase of the engine for reversible oscillating movement of the oscillating device on a first axis parallel to the crankshaft axis. The oscillating device is adapted for pivotally connecting to the little end of a further con rod having a big end connectable to the crankshaft for relative rotation, between the rocking mechanism and the further con rod, on a second axis offset from and parallel to the first axis.

Abstract: A rocking mechanism through which linear reciprocating movement of a piston of an internal combustion engine can be transferred, from the remote end of a connecting rod on which the piston is mounted, to a crankshaft. The mechanism includes a rocking member; mountings by which the rocking member is mountable in relation to the crankcase for the engine, for reversible rocking movement on a first axis (X1); a link member pivotally connected at one end to the rocking member so as to be pivotable relative to the rocking member on a second axis (X2) between two extreme positions; and a holding device.