Abstract: A cylinder liner associated with an internal combustion engine includes a cooling moat to reduce temperatures at an upper cylinder liner seal. The cooling moat may have a gap extending upwardly toward an inner running surface of the cylinder liner to supply coolant to an upper portion of the cylinder liner. The cooling moat may be provided at a location between the inner running surface of the cylinder liner and a groove for the upper cylinder liner seal.

Abstract: A cylinder liner for an engine includes a cylindrical wall having a radially internal surface and a radially external surface opposite the radially internal surface, the cylindrical wall defining a longitudinal axis therethrough, the radially external surface including a sealing surface and an undercut surface adjacent to the sealing surface, the sealing surface at least partly facing away from the longitudinal axis. The undercut surface includes a first surface and a second surface, the first surface at least partly facing the longitudinal axis, and the second surface at least partly facing away from the longitudinal axis.

Abstract: A cylinder liner for an engine includes a cylindrical wall having a radially internal surface and a radially external surface opposite the radially internal surface, the cylindrical wall defining a longitudinal axis therethrough, the radially external surface including a sealing surface and an undercut surface adjacent to the sealing surface, the sealing surface at least partly facing away from the longitudinal axis. The undercut surface includes a first surface and a second surface, the first surface at least partly facing the longitudinal axis, and the second surface at least partly facing away from the longitudinal axis.

Abstract: A cylinder liner associated with an internal combustion engine includes a cooling moat to reduce temperatures at an upper cylinder liner seal. The cooling moat may have a gap extending upwardly toward an inner running surface of the cylinder liner to supply coolant to an upper portion of the cylinder liner. The cooling moat may be provided at a location between the inner running surface of the cylinder liner and a groove for the upper cylinder liner seal.

Abstract: The piston has a crown forming a piston bowl. The piston bowl has a center portion with a convex spherical shape, a floor having a convex frusto-conical shape adjacent the center portion, and a base having a concave toroidal shape surrounding the floor. The piston bowl also has a cylindrical wall extending tangentially from the base that surrounds the center portion. The piston has a top surface perpendicular to the cylindrical wall along a rim of the piston bowl. A ratio between the piston bowl depth and the cylindrical wall length is less than 4, and a ratio between the piston bowl diameter and the piston bowl depth is 4.7.

Abstract: The piston has a crown forming a piston bowl. The piston bowl has a center portion with a convex spherical shape, a floor having a convex frusto-conical shape adjacent the center portion, and a base having a concave toroidal shape surrounding the floor. The piston bowl also has a cylindrical wall extending tangentially from the base that surrounds the center portion. The piston has a top surface perpendicular to the cylindrical wall along a rim of the piston bowl. A ratio between the piston bowl depth and the cylindrical wall length is less than 4, and a ratio between the piston bowl diameter and the piston bowl depth is 4.7.