| 摘要 |
FIELD: metallurgy industry. ^ SUBSTANCE: cylinder sleeve has external circular surface and upper, middle and lower parts in axial direction. In external circular surface section corresponding to upper part there formed is film with high thermal conductivity, and in external circular surface section corresponding to lower part there formed is film with low thermal conductivity. Coats of film with high thermal conductivity and film with low thermal conductivity are applied to external circular surface section corresponding to middle part, thus forming section with sandwich film. ^ EFFECT: decreasing temperature difference in axial cylinder direction, improving fuel consumption intensity. ^ 24 cl, 20 dwg, 2 tbl |
