To secure high safety in respect of function by detecting a characteristic parameter of an actuator driving unit, and obtaining a parameter expressing the operation by a control unit by using the characteristic parameter.

An automobile 1 is provided with a device 30 for the automatic operaton of a torque transmission system 3 and the automatic operation for setting the speed change ratio of a transmission 4. The device 30 has one actuator, the actuator has a driving unit, and a characteristic parameter is detected by the driving unit. By using the detected characteristic parameter, a parameter expressed for switching of a transmission speed change step and operation for the connection or release of a torque transmission system is obtained by a control unit 10 connected to the device 30 in such a manner as to transmit. Thus, high safety in respect of function can be secured.