| 摘要 |
PURPOSE:To improve heat resistance of a piston and to prevent thermal expansion in a crown part of the piston and its bottom part by forming an exposed surface of the aluminum-made piston crown part with a fabric material of carbonization-treated ceramic fiber. CONSTITUTION:A crown part 2 constitutes its top side of fabric material 12 of ceramic fiber. One side surface 14, serving as the exposed surface, impregnates the fabric material 12 with resin to be next baked applying carbonization treatment. In this way, a piston enables its heat resistance to be improved while thermal expansion to be inhibited of the crown part of the piston and its bottom part. |
