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US 10,648,425 B2Granted
Piston with broad ovate gallery
AssigneeTenneco Inc.
InventorsAndrew J. Miller, Juan Gildemeister, Dawnelle Wielosinski
Life of this patent
Estimating the term…
Abstract
An aluminum piston including a cooling gallery with titled inner and outer side walls is provided. The piston comprises a ring belt with a ring grooves, and an iron insert is disposed in a top one of the ring grooves. To reduce stress and mass of the piston, material located under the iron insert is removed, so that the outer side wall of the cooling gallery is tilted toward the center axis. The inner side wall of the cooling gallery is tilted away from the center axis.
Claims16
A piston, comprising:
- a body portion formed of an aluminum material and extending around a center axis,
- said body portion including a crown containing a cooling gallery,
- said crown presenting a combustion surface,
- said crown including a ring belt with a plurality of ring grooves,
- said ring grooves including a top ring groove located closer to said combustion surface than the other ring grooves,
- said cooling gallery of said body portion including an inner side wall and an outer side wall,
- said inner side wall of said cooling gallery being tilted away from said center axis of said body portion,
- said outer side wall of said cooling gallery being tilted toward said center axis of said body portion,
- said outer side wall and said center axis of said body portion presenting an angle ranging from 5 to 45 degrees therebetween,
- said cooling gallery having a volume, said body portion of said piston having a volume which includes said volume of said cooling gallery, and said volume of said cooling gallery being 10 to 12% of said volume of said body portion, and
- an insert disposed in said top ring groove of said ring belt.
8 more elements
A method of manufacturing a piston, comprising the steps of:
- providing a body portion formed of an aluminum material and extending around a center axis, the body portion including a crown containing a cooling gallery, the crown presenting a combustion surface, the crown including a ring belt with a plurality of ring grooves, the ring grooves including a top ring groove located closer to the combustion surface than the other ring grooves, the cooling gallery of the body portion including an inner side wall and an outer side wall, the inner side wall of the cooling gallery being tilted away from the center axis of the body portion, the outer side wall of the cooling gallery being tilted toward the center axis of the body portion, the outer side wall and the center axis of the body portion presenting an angle ranging from 5 to 45 degrees therebetween, the cooling gallery having a volume, the body portion of the piston having a volume which includes the volume of the cooling gallery, and the volume of the cooling gallery being 10 to 12% of the volume of the body portion, and
- disposing an insert in the top ring groove of the ring belt.
Dependencies are inferred from the claim text.