Forged piston with oriented grain flow
OwnerSteven Edward Legat, Cody Lyle Mayer +1inventors
InventorsSteven Edward Legat, Cody Lyle Mayer, Brian Todd Reese
Life of this patent
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Abstract
An improved piston forging for use in an internal combustion engine is disclosed. The piston forging comprises a crown, a pair of pin towers extending generally axially away from the crown, and a skirt extending generally axially away from the crown. The improved piston forging further comprises a plurality of grains flowing across the piston forging. The plurality of grains are reoriented during the forging operation into a configuration that follows the surfaces and features of the piston forging. More specifically, the plurality of grains are reoriented in a manner that is most beneficial to resist combustion and inertial forces that are enacted upon a machined piston during operation.
Claims18
A piston forging comprising:
- a crown comprising a top surface and an underside;
- a pair of pin towers extending axially away from the crown, wherein each of the pair of pin towers is joined to the underside of the crown by a fillet;
- a skirt extending axially away from the crown and comprising a pair of opposed skirt panel portions and a skirt band;
- and
- a plurality of grains flowing across the piston forging and oriented to resist forces applied to the piston forging, wherein the plurality of grains flow around a tangential perimeter of each fillet.
A piston forging for use in an internal combustion engine, the piston forging comprising:
- a crown comprising a top surface and an underside;
- a pair of pin towers extending axially away from the crown;
- a skirt extending axially away from the crown comprising a pair of opposed skirt panel portions and a skirt band extending around a perimeter of the piston forging connecting the pair of opposed skirt panel portions;
- a plurality of skirt panel strut assemblies connecting the pair of opposed skirt panel portions to the pair of pin towers;
- a plurality of supplemental strut assemblies each comprising a pair of supplemental struts extending radially between the skirt band and one of the pair of pin towers;
- and
- a plurality of grains flowing across the piston forging and oriented to resist forces applied to the piston forging, wherein an inner portion of the opposed skirt panel portions extend more radially outward from the adjacent skirt band than an inner surface of the skirt band.
A piston forging for use in an internal combustion engine, the piston forging comprising:
- a crown comprising a top surface and an underside;
- a pair of pin towers extending out of the underside of the crown axially away from the crown, each of the pair of pin towers joined to the underside of the crown by a fillet;
- a skirt extending axially away from the crown and comprising a pair of opposed skirt panel portions and a skirt band extending around a perimeter of the piston forging connecting the pair of opposed skirt panel portions;
- a plurality of skirt panel strut assemblies connecting the pair of opposed skirt panel portions to the pair of pin towers;
- a plurality of supplemental strut assemblies each comprising a pair of supplemental struts extending radially between the skirt band and one of the pair of pin towers;
- and
- a plurality of grains configured to flow from one side of the piston forging to an opposing side of the piston forging and oriented to resist forces applied to the piston forging, wherein the plurality of grains flow around a tangential perimeter of each fillet.
Dependencies are inferred from the claim text.