Patent ID: 9650951
Date: 2017-05-16
CPC Classifications: F01L,F02B,F02D

Claim:
1. A system comprising: a piston that moves within a cylinder of an internal combustion engine; a crankshaft connected to the piston by a connecting rod, the crankshaft rotating under influence of movement of the piston in the cylinder in accordance with an engine speed commanded by a throttle control; a junk head disposed opposite the piston proximate to a first end of the cylinder; and a first sleeve valve associated with a first port connecting to a combustion chamber defined at least in part by a head of the piston, an internal surface of the junk head, and the first sleeve valve, the first sleeve valve at least partially encircling the piston and opening and closing the first port by first movement between a first open position and a first closed position, a first sealing edge of the first sleeve valve being urged into contact with the first valve seat at the first closed position such that the first sealing edge is closer to the first end of the cylinder at the first closed position than at the first open position, the first movement comprising the first sleeve valve temporarily ceasing its motion in a direction aligned with an axis of the cylinder at the first closed position and at the first open position.