Engine piston having an insulating air gap

Patent · Tue Feb 02 00:00:00 EST 2010

OSTI ID:1014385

Jarrett, Mark Wayne ^[1]; Hunold, Brent Michael ^[2]

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1. Washington, IL
2. Apex, NC

A piston for an internal combustion engine has an upper crown with a top and a bottom surface, and a lower crown with a top and a bottom surface. The upper crown and the lower crown are fixedly attached to each other using welds, with the bottom surface of the upper crown and the top surface of the lower crown forming a mating surface. The piston also has at least one centrally located air gap formed on the mating surface. The air gap is sealed to prevent substantial airflow into or out of the air gap.

• Research Organization: Caterpillar Inc., Deerfield, IL (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: FC05-00OR22806
• Assignee: Caterpillar Inc. (Peoria, IL)
• Patent Number(s): 7,654,240
• Application Number: US Patent Application 11/505,803
• OSTI ID: 1014385
• Country of Publication: United States
• Language: English