| 摘要 |
An engine valve hydraulic actuator having an upper actuator housing slidably attached to a lower actuator housing is disposed between an oil supply header and an engine cylinder head where the supply header and the cylinder head are fixed relative to one another. The upper actuator housing is allowed to position and seal itself relative to the oil supply header and the lower actuator housing is allowed to position itself relative to the engine cylinder head to minimize friction and wear and thereby improve overall performance.
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