| 摘要 |
<p>A pressure-medium-controlled power unit is connected to a motion-transmitting mechanism which transmits gearchange movements of a gear lever to a gear box. A damper (42) is connected to the motion-transmitting mechanism to damp the auxiliary force supplied by the power unit so that auxiliary force is exerted more slowly but at a force required for executing gearchange movement. A valve connects power unit to a first pressure medium source, during engagement and disengagement of a gear in the gearbox, so that the power unit provides auxiliary force for gearchange movement.</p> |
