| 摘要 |
PURPOSE:To prevent accumulation of carbon in a heat insulating space and to improve engine performance according to the method wherein a heat insulating space is formed between a metallic cylinder and the recessed part of a cylinder head, and the heat insulating space is charged with a fiber moulded product for heat insulation. CONSTITUTION:A ceramic member, 6 formed to the interior of an auxiliary chamber 5, and a metallic ring 7, shrink-fit in outer peripheral parts 8a and 9a of the member 6, are provided. A fiber moulded product 16 for heat insulation, with which a heat insulating space 15 formed between the metallic ring 7 and a recessed part 1a of a cylinder head 1, in which the metallic ring is pressed, is charged and on the outer peripheral surface of which a coating layer 17 is formed, is provided. This prevents carbon from being accumulated in the heat insulating space, and also enables improvement of the degree of heat insulation and engine performance. |
