| 摘要 |
PROBLEM TO BE SOLVED: To provide a cylinder liner having a structure for improvement of cooling performance. SOLUTION: The cylinder liner is fitted in a cylinder block, comprises an upper stepped part fitted in an upper part of the cylinder block and a lower stepped part fitted in a lower part of the cylinder block, and includes a surface roughening treatment area 11a given a surface roughening treatment on its surface in an water jacket forming area 11 which is provided on a bore outer wall surface between the upper stepped part and the lower stepped part and defines a water jacket space together with an inner wall surface of the cylinder block. COPYRIGHT: (C)2008,JPO&INPIT
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