Patent ID: 8893693
Filing Date: 2014-11-25
Classification: C25D,F01L,F02B,F02F,F05C,Y10T

Abstract:
1. An internal combustion engine, comprising: an anodic oxidation coating film formed on all or a portion of a wall facing a combustion chamber of the internal combustion engine, the anodic oxidation coating film having a structure provided with a bonding region and a nonbonding region, each of hollow cells forming the coating film in the bonding region being bonded to the adjacent hollow cells, and three or more adjacent hollow cells in the nonbonding region being not bonded to each other, and a porosity of the anodic oxidation coating film in the anode oxidation coating film being determined by a first void present in the hollow cell and a second void forming the nonbonding region.