Piston made using additive manufacturing techniques
AssigneeFederal-Mogul Corporation
InventorsCarmo Ribeiro, Owen Lu, Thomas Egerer
Life of this patent
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Abstract
A monobloc piston body for an internal combustion engine is provided. The piston body includes a first piece which includes a pair of skirt portions and a pair of pin bosses and a second piece which includes a crown portion with an upper combustion surface and an at least partially enclosed oil gallery. The first and second pieces are joined together at a joint that is located on a side of the oil gallery opposite of the upper combustion surface. The firs piece is made through casting or forging, and the second piece is made through an additive manufacturing process, such as direct metal laser sintering.
Claims15
A method of making a piston body for an internal combustion engine, comprising the steps of:
- casting or forging a portion of a piston body;
- and
- melting a metallic powder through an additive manufacturing process to build the remainder of the piston body onto the cast or forged portion of the piston body.
A method of making a monobloc piston body for an internal combustion engine, comprising the steps of:
- casting or forging a first piece of the piston body;
- making a second piece of the piston body through an additive manufacturing process;
- and
- joining the first and second pieces together.
A monobloc piston body for an internal combustion engine, comprising:
- a first piece including a pair of skirt portions and a pair of pin bosses and a second piece including a crown portion with an upper combustion surface and an at least partially enclosed oil gallery;
- and
- said first and second pieces being joined together at a joint with the joint that is on a side of said oil gallery opposite of said upper combustion surface.
Dependencies are inferred from the claim text.