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US 6,539,910 B1Granted
Closed gallery piston having con rod lubrication
AssigneeFederal-Mogul World Wide, Inc.
InventorsRandall R. Gaiser, Carmo Ribeiro, Eduardo H. Matsuo
Life of this patent
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Abstract
A piston for diesel engines includes a piston body having a closed oil gallery and a pair of pin bosses with axially aligned pin bores. The inner faces of the pin bosses are separated from one another by an intervening space between the pin bosses for receiving the upper end of a connecting rod, which has associated outer faces adjacent the inner faces of the pin bosses. Oil passages extend from the gallery and open to the inner faces of the pin bosses for providing direct lubrication to the inner faces.
Claims9
A piston for diesel engines, comprising:
- a piston body having an oil gallery;
- a pair of pin bosses having pin bores aligned about a pin bore axis and axially inwardly directed inner faces surrounding said pin bores and separated from one another by an intervening space between said pin bosses for receiving an upper end of a connecting rod;
- and
- at least one oil passage extending from said oil gallery to an opening in at least one of said inner faces of said pin bosses to provide direct lubrication of cooling oil thereto, said opening of said oil passage being below the bottom surface of said oil gallery at the location of said oil passage.
1 more element
Dependencies are inferred from the claim text.