| 摘要 |
<P>PROBLEM TO BE SOLVED: To maintain an insulation property in an internal combustion engine having insulative films with a porous structure. <P>SOLUTION: The insulative films 40, 42 having thermal conductivity lower than thermal conductivity of a combustion chamber base material and a heat capacity per unit volume lower than the heat capacity per unit volume of the combustion chamber base material, wherein each element forming the combustion chamber 26 is set as a combustion chamber base material, are formed on a wall surface facing to a combustion chamber 26 of the internal combustion engine 10. The insulative films 40, 42 are formed from an anode oxide film having the porous structure including numerous pores, and a plurality of filler particles are charged into the pores so as to make a gap between neighboring particles set to be a predesignated size. For example, the size of the designated gap is set to be smaller than an mean free path of gaseous molecules under high temperature and high pressure in the combustion chamber 26. <P>COPYRIGHT: (C)2012,JPO&INPIT |
