Piston with variable depth groove root
AssigneeElectro-Motive Diesel, Inc.
InventorPanchangam Nivarthi Amar Jeetendra
Life of this patent
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Abstract
A piston for an internal combustion engine includes a cylindrical piston body defining a longitudinal axis and having a top end and an outer cylindrical surface. A first piston ring groove is formed in the outer cylindrical surface and includes a groove root, an upper surface and a lower surface. The groove root has a variable depth about a circumference of the cylindrical piston body.
Claims18
A piston for an internal combustion engine, comprising:
- a cylindrical piston body defining a longitudinal axis and having a top end and an outer cylindrical surface;
- and
- a first piston ring groove formed in the outer cylindrical surface, wherein the first piston ring groove includes a groove root, an upper surface and a lower surface;
- wherein the groove root has a variable depth about a circumference of the cylindrical piston body.
A piston assembly for an internal combustion engine, comprising:
- a piston having a cylindrical piston body and having a top end and an outer cylindrical surface, a first piston ring groove formed in the outer cylindrical surface, wherein the first piston ring groove includes a groove root, an upper surface and a lower surface;
- a piston ring at least partially received within the first piston ring groove;
- and
- a cylinder liner receiving the piston and having an inner surface;
- wherein the groove root has a variable depth about a circumference of the cylindrical piston body.
A method of manufacturing a piston for an internal combustion engine, wherein the piston includes a cylindrical piston body and has a top end and an outer cylindrical surface, the method comprising steps of:
- determining identified areas of liner and piston ring non-conformance along an internal surface of a cylinder liner;
- and
- forming a first piston ring groove in the outer cylindrical surface having a variable depth groove root, varying about a circumference of the cylindrical piston body at areas corresponding to the identified areas of liner and piston ring non-conformance
Dependencies are inferred from the claim text.