Two-Part Stationary Ring for Devices Having Pistons

摘要

In some two-stroke engines, a stationary ring is disposed in a groove in the cylinder liner. However, it is a challenge to install such a stationary ring while maintaining a narrow gap to minimize gas flow through the gap. A ring system for an internal combustion engine is disclosed that includes an L-shaped, split ring with a reentrant angle and a nested, split ring with a convex quadrilateral cross section nested with the L-shaped ring proximate the reentrant angle. The two rings are affixed so that the two gaps of the split rings cannot align. Or, in other embodiments, the two are allowed to rotate relative to each other over a predetermined angle.

主权项

1. A ring system for a device having a reciprocating piston, comprising:
an L-shaped, split ring with a reentrant angle; a nested, split ring having a convex quadrilateral cross section nested with the L-shaped ring proximate the reentrant angle; and a feature associated with at least one of the L-shaped and nested rings that limits relative, rotational movement between the rings to less than a predetermined angle wherein the L-shaped and nested rings are adapted to be installed into a groove in a cylinder wall of the device.