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公开(公告)号:US20180195610A1
公开(公告)日:2018-07-12
申请号:US15866121
申请日:2018-01-09
申请人: FEDERAL-MOGUL LLC
发明人: Miguel AZEVEDO , Greg SALENBIEN , Andrew STOCKWELL
CPC分类号: F16J1/18 , F02F3/0023 , F02F3/003 , F02F3/0069 , F02F3/0076 , F02F3/12 , F02F3/22 , F02F2003/0007 , F16J1/08
摘要: A steel piston for coupling to a connecting rod and wrist pin is provided. The piston includes a body with an upper crown presenting a combustion surface for exposure to a combustion chamber. The upper crown presents an undercrown surface which is openly exposed as viewed from an underside of the piston and not bounded by a cooling gallery. The body includes a ring belt and pin bosses depending from the ring belt and presenting a pin bore for receiving the wrist pin. The body also includes ribs disposed along the undercrown surface. The body includes a ratio of compression height to outer diameter (CH/D) ranging from 34.8% to 42.0%. The piston also includes a low heat transfer coating on the combustion surface, and the low heat transfer coating has a thermal conductivity of about 0.20 to 0.80 W/m·K.