Coating to reduce coking deposits on steel pistons
AssigneeTenneco Inc.
InventorsWARRAN BOYD LINETON, TIMOTHY CHRISTOPHER VEZINA
Life of this patent
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Abstract
A piston for an internal combustion engine is provided. The piston includes a coating applied to a ferrous body portion to reduce or prevent chemical bonding of carbon deposits or coking on the body portion at temperatures ranging from 200 to 400° C. The coating includes a fluoropolymer, such as polytetrafluoroethylene, fluorosilane, fluorocarbon, fluoroplastic resin, and/or perfluoroplastic, and may be hydrocarbon or silicone based. The coating also has a thickness of 25 microns to 1 millimeter. The coating can be disposed on an undercrown surface, ring grooves, ring lands, pin bosses, and/or skirt sections of the body portion.
Claims14
A piston, comprising:
- a body portion formed of a ferrous material,
- said body portion including a crown presenting a combustion surface and undercrown surface,
- a coating disposed on said undercrown surface of said body portion,
- said coating including a fluoropolymer,
- said coating including at least one of polysilane and polysilazane, and said coating having a thickness of 25 microns to 1 millimeter.
A piston, comprising:
- a body portion formed of a ferrous material,
- a coating disposed on at least a portion of an undercrown surface of said body portion, and
- said coating including a fluoropolymer,
- said coating including polysilane, and
- said coating having a thickness of 25 microns to 1 millimeter.
Dependencies are inferred from the claim text.