Abstract: A system is provided. The system includes a reciprocating engine configured to consume oil at or less than 0.25 g/kw-hr and to use makeup oil. The reciprocating engine includes an engine oil sump. The system is configured to maintain an oil volume in the reciprocating engine during operation so that a residence time of oil in the reciprocating engine is at or less than 1000 hours.

Abstract: A power cylinder system for a reciprocating engine includes a piston configured to move within a cylinder of the reciprocating engine. The system also includes a groove extending circumferentially about the piston and configured to support a ring. An axially-facing surface of the groove has circumferential undulations at ambient temperatures that are configured to compensate for distortions to the groove caused by operation of the reciprocating engine.

Abstract: A system is provided. The system includes a reciprocating engine configured to consume oil at or less than 0.25 g/kw-hr and to use makeup oil. The reciprocating engine includes an engine oil sump. The system is configured to maintain an oil volume in the reciprocating engine during operation so that a residence time of oil in the reciprocating engine is at or less than 1000 hours.

Abstract: A power cylinder system for a reciprocating engine includes a piston configured to move within a cylinder of the reciprocating engine. The system also includes a groove extending circumferentially about the piston and configured to support a ring. An axially-facing surface of the groove has circumferential undulations at ambient temperatures that are configured to compensate for distortions to the groove caused by operation of the reciprocating engine.

Abstract: The present application provides a piston assembly. The piston assembly may include a cylinder bore extending from a thrust side to an antithrust side and a piston positioned within the cylinder bore. The piston may include a top land, a second land, and a skirt with an axis extending therethrough. The piston may include a tight land profile with an offset about the axis of the skirt.

Abstract: A power cylinder system for a reciprocating engine includes a piston configured to move within a cylinder of the reciprocating engine. The system also includes a groove extending circumferentially about the piston and configured to support a ring. An axially-facing surface of the groove has circumferential undulations at ambient temperatures that are configured to compensate for distortions to the groove caused by operation of the reciprocating engine.

Abstract: A power cylinder system for a reciprocating engine includes a piston configured to move within a cylinder of the reciprocating engine. The system also includes a groove extending circumferentially about the piston and configured to support a ring. An axially-facing surface of the groove has circumferential undulations at ambient temperatures that are configured to compensate for distortions to the groove caused by operation of the reciprocating engine.

Abstract: The present application provides a piston assembly. The piston assembly may include a cylinder bore extending from a thrust side to an antithrust side and a piston positioned within the cylinder bore. The piston may include a top land, a second land, and a skirt with an axis extending therethrough. The piston may include a tight land profile with an offset about the axis of the skirt.

Abstract: An assembly includes a cylinder having a bore diameter, and a piston disposed within the cylinder. The piston is provided with a top land and a top ring groove. The top land and the cylinder are provided with a tight top land clearance. The ratio of the top land height to the bore diameter is less than or equal to 0.075.

Abstract: A power cylinder system for a reciprocating engine includes a steel piston configured to move within a cylinder of the reciprocating engine. The system also includes a groove extending circumferentially about the piston beneath a top land of the piston and configured to support a ring having an inner circumferential face. One or more channels are formed in the top land and are configured to facilitate transfer of combustion gases to a space between a portion of the groove and the inner circumferential face of the ring.

Abstract: In one embodiment, a method may include retrieving, via a processor, a fundamental frequency of a cylinder type from a memory communicatively coupled to the processor, receiving, via the processor, a first signal from a first knock sensor disposed on a cylinder. The cylinder is disposed in an engine. The method may also include deriving whether a number of amplitudes of the first signal at the fundamental frequency and one or more harmonic frequencies exceed an undesired installation threshold value, and identifying an asymmetric piston as having an undesired installation if the undesired installation threshold value exceeds the number of amplitudes of the first signal and the one or more harmonic frequencies.

Abstract: A power cylinder system for a reciprocating engine includes a piston configured to move within a cylinder of the reciprocating engine. The system also includes a groove extending circumferentially about the piston and configured to support a ring. An axially-facing surface of the groove has circumferential undulations at ambient temperatures that are configured to compensate for distortions to the groove caused by operation of the reciprocating engine.

Abstract: A system, includes a piston. The piston has a first outer diameter and includes an annular ring groove that receives a ring. The annular ring groove is defined by a top surface, a bottom surface, and an inner surface that extends between the top surface and the bottom surface in an axial direction along a longitudinal axis of the piston. The inner surface has an inner diameter that is less than the outer diameter. The bottom surface has a recess that extends both in the axial direction and a radial direction relative to the longitudinal axis.

Abstract: A cylinder liner for an internal combustion engine includes a liner body defining a longitudinal axis coated with a coating on the interior surface of the liner body that varies in thickness along the longitudinal axis. The coating on the interior surface is thicker in a region of the interior surface corresponding to a top dead center or a bottom dead center of a piston.

Abstract: A power cylinder system for a reciprocating engine includes a piston with a top-most groove extending circumferentially about the piston. The top-most groove includes one or more channels spaced apart circumferentially about the top-most groove and extending inward from an outer perimeter of the piston assembly. The system also includes a ring positioned in the top-most groove, the ring including a top face, a bottom face, an inner circumferential face, and an outer circumferential face that tapers between the top face and the bottom face. A space is defined between a portion of the top-most groove and the inner circumferential face of the ring, and the space is in fluid communication with the one or more radial channels.

Abstract: A power cylinder system for a reciprocating engine includes a steel piston configured to move within a cylinder of the reciprocating engine. The system also includes a groove extending circumferentially about the piston beneath a top land of the piston and configured to support a ring having an inner circumferential face. One or more channels are formed in the top land and are configured to facilitate transfer of combustion gases to a space between a portion of the groove and the inner circumferential face of the ring.

Abstract: A system includes a reciprocating engine having a cylinder liner and a piston disposed within the cylinder liner. The cylinder liner includes an inner wall and extends around a cavity. The inner wall includes a first axial end, a second axial end, a piston travel portion, and a top portion. The top portion is nearer to the first axial end of the cylinder liner than to the second axial end of the cylinder liner. The top portion has a first surface finish with a first roughness average (Ra1) greater than approximately 2 ?m and a total waviness (Wt) less than approximately 0.1 mm. The piston is configured to move in a reciprocating manner within the cylinder liner. The piston includes a top land configured to be radially opposite the top portion of the inner wall of the cylinder liner when the piston is at a top dead center position.

Abstract: A power cylinder system for a reciprocating engine includes a piston configured to be disposed within a cylinder and to move in a reciprocating manner within the cylinder. The piston also includes a top-most groove extending circumferentially about the piston beneath a top land of the piston and a ring disposed within the top-most groove. A single channel is formed in the top land or the ring, and the single channel extends from an outer perimeter of the piston to a space between an inner surface of the top-most groove and an inner face of the ring.

Abstract: A system includes a reciprocating engine having a cylinder liner and a piston disposed within the cylinder liner. The cylinder liner includes an inner wall and extends around a cavity. The inner wall includes a first axial end, a second axial end, a piston travel portion, and a top portion. The top portion is nearer to the first axial end of the cylinder liner than to the second axial end of the cylinder liner. The top portion has a first surface finish with a first roughness average (Ra1) greater than approximately 2 ?m and a total waviness (Wt) less than approximately 0.1 mm. The piston is configured to move in a reciprocating manner within the cylinder liner. The piston includes a top land configured to be radially opposite the top portion of the inner wall of the cylinder liner when the piston is at a top dead center position.

Abstract: A power cylinder system for a reciprocating engine includes a piston configured to move within a cylinder. A top-most groove extends circumferentially about the piston and is configured to support a first ring, and a space is defined between a portion of the top-most groove and an inner circumferential face of the first ring while the first ring is disposed within the top-most groove. A bottom-most groove extends circumferentially about the piston and is axially spaced apart from the top-most groove. A second ring positioned in the bottom-most groove is configured to exert a pressure of less than approximately 1 MPa against an inner annular wall of the cylinder while the piston is positioned within the cylinder. One or more channels formed in the top land are configured to transfer combustion gases to the space while the first ring is disposed within the top-most groove.