| 摘要 |
PROBLEM TO BE SOLVED: To provide an internal combustion engine having a structure of suppressing adhesion of deposits. SOLUTION: A piston 10 includes an uneven surface 12 on a surface of a piston upper part 14 (namely, a piston top surface). The uneven surface 12 is composed by a plurality of cone bodies aligned at an inter-vertex distance (pitch) P. The height of a projection of the uneven surface is defined as H. The relations of P≤0.5μm and P/2≤H are satisfied. COPYRIGHT: (C)2011,JPO&INPIT
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