US 11,719,184 B1
Piston with engineered crown coating and method of manufacturing
Warran Lineton, Chelsea, MI (US); and Greg Salenbien, Britton, MI (US)
Assigned to Tenneco Inc., Lake Forest, IL (US)
Filed by Tenneco Inc., Lake Forest, IL (US)
Filed on Jan. 21, 2022, as Appl. No. 17/581,391.
Int. Cl. F02F 3/28 (2006.01); C23C 4/18 (2006.01); F02F 3/00 (2006.01); C23C 4/11 (2016.01); C23C 4/134 (2016.01); C23C 4/02 (2006.01); F02F 3/10 (2006.01)
CPC F02F 3/0084 (2013.01) [C23C 4/02 (2013.01); C23C 4/11 (2016.01); C23C 4/134 (2016.01); C23C 4/18 (2013.01); F02F 3/10 (2013.01); F02F 3/28 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A piston, comprising:
a body portion formed of metal;
said body portion including a combustion surface, the combustion surface including a combustion bowl surrounded by a bowl rim;
said combustion bowl extending radially from a center axis of said body portion to said bowl rim, and said bowl rim extending circumferentially around said combustion bowl;
a high thermal conductivity material disposed on at least one first region of said combustion surface, said high thermal conductivity material having a thermal conductivity of at least 100 W/mK;
a low thermal conductivity material disposed on at least one second region of said combustion surface spaced radially and/or circumferentially from said at least one first region, said low thermal conductivity material having a thermal conductivity of not greater than 1 W/mK.