PISTON FOR AN INTERNAL COMBUSTION ENGINE

摘要

A piston for a two-stroke internal combustion engine has a crown and a skirt extending from the crown. The skirt defines a reciprocation axis of the piston. A circumferential piston groove is defined in the crown. An annular ring carrier is disposed in the piston groove. A circumferential carrier groove is defined in the ring carrier, the carrier groove being concentric with the piston groove. A retainer is disposed in the carrier groove. The retainer extends at least in a radial direction of the piston into the ring carrier. The carrier groove is adapted to receive a piston ring and the retainer is adapted to prevent rotational motion of the piston ring in the carrier groove, the rotational motion being about the reciprocation axis. Two-stroke internal combustion engines are also disclosed.

主权项

1. A two-stroke internal combustion engine comprising:
a cylinder having an intake port; and a piston disposed in the cylinder, the piston comprising: a crown; a skirt extending from the crown, the skirt defining a reciprocation axis of the piston; a circumferential piston groove defined in the crown; an annular ring carrier disposed in the piston groove; a circumferential carrier groove defined in the ring carrier, the carrier groove being concentric with the piston groove; a retainer disposed in the carrier groove, the retainer extending at least in a radial direction of the piston into the ring carrier, the retainer being aligned with the intake port in a circumferential direction of the piston; and a piston ring disposed in the carrier groove, the piston ring having a gap in the circumferential direction, the retainer extending at least in part of the gap to prevent rotational motion of the piston ring in the carrier groove, the rotational motion being about the reciprocation axis.