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 |
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.
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