| 摘要 |
An automatic selector device for actuating a frictional selector device, i.e. a clutch or brake, combines a selector actuator, a selector valve for the working pressure of the selector actuator, a change control valve dependent on the steady-state condition of the selector device and a switch-over control valve which can be triggered by an electronic control unit. In the case of failure of the control unit or the voltage supply, the selector device remains actuated in its instantaneous steady-state condition.
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