INTERNAL COMBUSTION ENGINE

摘要

An internal combustion engine is provided. Facing pistons eliminate a cylinder head, thereby reducing heat losses through a cylinder head. Facing pistons also halve the stroke that would be required for one piston to provide the same compression ratio, and the engine can thus be run at higher revolutions per minute and produce more power. An internal sleeve valve is provided for space and other considerations. A combustion chamber size-varying mechanism allows for adjustment of the minimum size of an internal volume to increase efficiency at partial-power operation. Variable intake valve operation is used to control engine power.

主权项

1. An internal combustion engine, comprising:
a cylinder block portion having a cylindrical bore therein; a path-defining piece inserted within the cylindrical bore, the path-defining piece comprising an inner surface and a helical groove formed in the inner surface; and a sleeve valve disposed within the oil path-defining piece and slidably moveable relative to the oil path-defining piece, the sleeve valve comprising a first outer surface, an enclosed helical cooling passage being defined by the first outer surface of the sleeve valve and by the helical groove.