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US 10,865,734 B2Granted
Piston assembly with offset tight land profile
AssigneeAi Alpine US Bidco Inc
InventorsRichard John Donahue, Lorne Eugene Nix, Kenneth Edward Neuman
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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.
Claims18
A piston assembly, comprising:
- a cylinder bore;
- the cylinder bore extending from a thrust side to an antithrust side;
- and
- a piston positioned within the cylinder bore, wherein the piston is configured to move in an axial direction within the cylinder bore;
- the piston comprising a top land and a second land;
- the piston comprising a skirt with a central skirt axis therethrough;
- the piston comprising a tight land profile of the top land and/or the second land with a central land axis therethrough, wherein the tight land profile has a minimum clearance of 0 to 35 microns between the cylinder bore and the top land and/or the second land during rated operating temperatures;
- and
- the tight land profile comprising an offset of the central land axis away from the central skirt axis toward the antithrust side, wherein the central skirt axis and the central land axis extend in the axial direction.
6 more elements
A piston assembly for a power generation system, comprising:
- a cylinder liner;
- the cylinder liner extending from a thrust side to an antithrust side;
- and
- a piston positioned within the cylinder liner, wherein the piston is configured to move in an axial direction within the cylinder liner;
- the piston comprising a skirt, a top land, and a second land;
- and
- the top land and/or the second land comprising a central land axis offset away from a central skirt axis of the skirt towards the antithrust side, wherein the central skirt axis and the central land axis extend in the axial direction.
4 more elements
A system, comprising:
- a piston configured to mount in a cylinder bore of an engine, wherein the piston comprises:
- a skirt disposed about a central skirt axis;
- a land disposed about a central land axis;
- a ring groove disposed adjacent the land, wherein the central land axis is offset away from the central skirt axis toward the antithrust side to position the land off center relative to the cylinder bore such that the land is positioned closer to the antithrust side and further from the thrust side, and the central skirt axis and the central land axis extend in an axial direction along an axial path of travel of the piston in the cylinder bore.
1 more element
Dependencies are inferred from the claim text.