| 摘要 |
A valve rotator is effective between a valve stem of an internal-combustion engine and a support, normally the cylinder head. The rotator comprises an upper spring plate, a lower spring plate spaced along an axis below this upper plate, a compession spring braced axially between the plates, a two-part link element having an upper part rotationally secured to the valve stem and a lower part rotationally fixed in at least one rotational direction relative to the axis on the lower plate, and a unidirectional clutch between the lower part and the support and permitting the lower part to rotate about the axis only in the one direction relative to the support. Normally the lower plate is rotatable relative to the upper plate and the lower part is generally cylindrical, centered on the axis, and fixed rotationally on the lower plate. The clutch is also normally provided between the lower plate and part and the support. Such a rotator is connected with the clutch so that it turns with the valve. |
