Patent ID: 9194327
Filing Date: 2015-11-24
Classification: F02F

Abstract:
1. A reciprocating engine, comprising: a cylinder liner having an inner surface that defines a cavity, wherein the cylinder liner comprises a plurality of slots disposed along a portion of the inner surface; a piston disposed within the cylinder liner, wherein the piston is configured to move between a first position and a second position; and a first ring disposed about the piston beneath a top land of the piston, wherein the first ring, the top land, a first ring groove of the piston, and the inner surface of the cylinder liner define a top land cavity having a first volume; and a second ring disposed about the piston below the first ring and a second land of the piston, wherein the first and second rings, the second land, a second ring groove of the piston, and the inner surface of the cylinder liner define an interring cavity having a second volume, wherein a total volume of the plurality of slots is greater than or equal to a difference between the first volume of the top land cavity and the second volume of the interring cavity; wherein in the first position the first and second rings, the top land cavity, and the interring cavity do not interface with the plurality of slots, and in the second position either the first ring or the second ring and at least one of the top land cavity or the interring cavity interface with the plurality of slots.