| 摘要 |
An improved valve rotation arrangement for providing valve rotation for a pressure medium valve in an internal combustion engine, especially a large diesel engine or gas engine, whereby the valve is opened under positive guidance for instance under the influence of a rocker arm and is closed by means of a spring, comprises a bearing arrangement for turnably journalling the upper part of a valve stem to the valve spring and a rotation mechanism supported to the cylinder head of the engine and arranged to provide valve rotation. The bearing arrangement comprises a slide bearing between a rotation element, arranged to the upper part of the valve stem, and a bearing housing element supported to the valve spring.
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