| 摘要 |
A torsional vibration damper has a first flywheel assembly (23) coupled, via a spring device (48), to a second flywheel assembly (33), with a third flywheel (54) positioned in between. The third flywheel may be disengaged from the drive train on attainment of a predetermined state of a operating parameter, such as rotational speed (or change in speed), relative angular position between first and second flywheels, engine coolant temperature, or rate of change of throttle opening. Such disengagement may occur mechanically, by means of centrifugal force acting on coupling elements 62, or by a switching device (106a, Figure 2). By disengaging part of the damping mass, the torsion damper adapts to different operating conditions, for example removing unwanted inertial mass at high engine speeds. |
