Abstract: A piston may have an annular body including a crown portion defining a longitudinal axis, a radial direction perpendicular to the longitudinal axis, a plane containing the longitudinal axis and the radial direction, and a contoured combustion bowl. In the plane containing the longitudinal axis and the radial direction, the crown portion includes a radially outer squish surface, and a swirl pocket having a reentrant surface that extends axially downwardly and radially outwardly from the squish surface defining a tangent that forms a reentrant angle with the squish surface that ranges from 53.0 degrees to 57.0 degrees.

Abstract: A piston includes a swirl pocket that extends radially from the radially outer lip portion to a lower axial extremity spaced away from the radially outer lip portion a first axial distance. A convex arcuate surface extends downwardly and inwardly from the radially outer lip portion, a concave arcuate surface extends to the lower axial extremity from the convex arcuate surface, and a conical portion extends upwardly and inwardly from the concave arcuate surface to an apex that is spaced a second axial distance from the radially outer lip portion that is less than the first axial distance.

Abstract: A piston may have an annular body including a crown portion defining a longitudinal axis, a radial direction perpendicular to the longitudinal axis, a plane containing the longitudinal axis and the radial direction, and a contoured combustion bowl. In the plane containing the longitudinal axis and the radial direction, the crown portion includes a radially outer squish surface, and a swirl pocket having a reentrant surface that extends axially downwardly and radially outwardly from the squish surface defining a tangent that forms a reentrant angle with the squish surface that ranges from 53.0 degrees to 57.0 degrees.

Abstract: A piston may have an annular body including a crown portion defining a longitudinal axis, a radial direction perpendicular to the longitudinal axis, a plane containing the longitudinal axis and the radial direction, and a contoured combustion bowl. In the plane containing the longitudinal axis and the radial direction, the crown portion includes a radially outer squish surface, and a swirl pocket having a reentrant surface that extends axially downwardly and radially outwardly from the squish surface defining a tangent that forms a reentrant angle with the squish surface that ranges from 53.0 degrees to 57.0 degrees.

Abstract: Systems and methods for forming a plurality of valleys on an inner circumferential surface of a cylinder liner for uniform oil film thickness are disclosed. In one aspect, an internal combustion engine includes a piston; and a cylinder liner surrounding the piston, wherein the cylinder liner has a plurality of valleys on an inner circumferential surface of the cylinder liner, and wherein the plurality of valleys are formed to a frequency of 7 to 14 valleys per millimeter (mm) having a depth of at least 1 micrometer (?m).

Abstract: A piston includes a swirl pocket that extends radially from the radially outer lip portion to a lower axial extremity spaced away from the radially outer lip portion a first axial distance. A convex arcuate surface extends downwardly and inwardly from the radially outer lip portion, a concave arcuate surface extends to the lower axial extremity from the convex arcuate surface, and a conical portion extends upwardly and inwardly from the concave arcuate surface to an apex that is spaced a second axial distance from the radially outer lip portion that is less than the first axial distance.

Abstract: An anti-polishing ring includes a ring body defining an axis of revolution, and a radial direction that is perpendicular to the axis of revolution, and a circumferential direction about the axis of revolution. The ring body includes an outer circumferential surface, a bottom surface, a top surface, and an inner circumferential surface. The inner circumferential surface defines an inner diameter, the ring body defines a radial thickness measured from the inner circumferential surface to the outer circumferential surface, and a ratio of the radial thickness to the inner diameter ranges from 0.015 to 0.020.

Abstract: A cylinder liner for an engine is disclosed. The cylinder liner may include a cylindrical sleeve with an inner surface and an outer surface extending axially from a first end to a second end. The cylinder liner may also include a void disposed in the first end and concentric to the inner surface of the cylindrical sleeve.

Abstract: A cylinder liner for an engine is disclosed. The cylinder liner may include a cylindrical sleeve with an inner surface and an outer surface extending axially from a first end to a second end. The cylinder liner may also include a void disposed in the first end and concentric to the inner surface of the cylindrical sleeve.

Abstract: An internal combustion engine includes a housing having a cylinder bore defining a bore diameter of 260 mm or greater, a fuel injector coupled to the housing, and a crankshaft rotatably coupled to the housing. A piston is coupled to the crankshaft and movable to increase a fluid pressure within the cylinder bore to an autoignition pressure, and includes a combustion face defining a plurality of valve pockets in a compound combustion bowl. Spray orifices in the fuel injector define a spray angle greater than 145°, and the combustion bowl has a diameter from 190 mm to 230 mm such that combustion of injected fuel yields a BMEP of 1600 kPa or greater and 0.25 grams particulate matter or less per bkW·h energy output of the internal combustion engine.