| 摘要 |
A cylinder liner for a large two-stroke internal combustion engine has in its upper portion a number of groups of cooling surfaces, in which the cooling surfaces may groupwise be open or closed to through-flow of cooling water. In the first group the cooling surfaces (8) are provided by channels extending obliquely into the wall of the liner, and the cooling channels in the second group are likewise oblique bores, which at least at their upper section are positioned at a larger distance from the liner running surface (5) than the channels of the first group. The third group has a single cooling surface (18) at the external side of the liner. The intensity of the cooling may be varied in dependency of the thermal load on the liner by the cooling water being routed to selected cooling surfaces (8, 8', 18), the distance from the running surface and/or the number of which are adjusted to the current thermal load.
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