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US 11,959,412 B2Granted
Pistons and piston assemblies for internal combustion engines
AssigneesCummins Inc., Achates Power, Inc.
InventorAdam C. Cecil
Life of this patent
Estimating the term…
Abstract
Pistons and piston assemblies for an internal combustion engine is provided. The piston assembly includes a piston coupled to a connecting rod with a piston pin. The piston pin includes a non-circular outer cross-sectional shape.
Claims20
A piston pin for coupling a connecting rod to a piston, the piston pin comprising:
- a cylindrical piston pin body including a first surface configured to be engaged to an end of the connecting rod with the piston pin body positioned within the piston to couple the connecting rod to the piston, the piston pin body extending along a longitudinal axis that is transverse to the connecting rod, the piston pin body further including an outer surface extending around the longitudinal axis from the first surface, the outer surface having a non-circular shape around the longitudinal axis from one side of the first surface to an opposite side of the first surface, the opposite sides of the first surface and the non-circular shape extending a length of the piston pin body along the longitudinal axis.
A piston assembly for an internal combustion engine, the piston assembly comprising:
- a piston that is movable along a cylinder bore of the internal combustion engine, the piston including an upper portion and a lower portion, the upper portion of the piston including a crown facing the cylinder bore;
- and
- a piston pin extending along a longitudinal axis transversely to the piston, the piston pin being coupled to the piston below the crown, wherein the piston pin includes an outer surface extending around the longitudinal axis and a flat surface with opposite sides extending a length of the piston pin along the longitudinal axis, the outer surface having a non-circular shape from one side of the flat surface and from an opposite side of the flat surface to a first portion of the outer surface opposite the flat surface so that gaps for receiving fluid are created between the piston pin and the upper portion of the piston in response to the piston moving along the cylinder bore.
A piston cooling arrangement for an internal combustion engine, the piston cooling arrangement comprising:
- a piston configured to reciprocally move in a cylinder bore of the internal combustion engine;
- and
- a piston bearing cage provided inside the piston, the piston bearing cage including:
- at least one inlet port for fluid and at least one outlet port for fluid, wherein the at least one inlet port is obliquely angled from an outer perimeter of the piston bearing cage to direct fluid flowing into the piston from a first trajectory that follows the outer perimeter of the piston bearing cage to a second trajectory towards a center location of the piston.
1 more element
Dependencies are inferred from the claim text.