Device for authorizing an unrestricted operating mode of a vehicle control device in the event of a failure of the ignition signal

摘要

The invention relates to a vehicle having a device for the automated activation of a clutch in the drive train of a motor vehicle. A failure in the security system (103) of the automated clutch, for example, when the device is in operation, can cause the ignition signal (V 2 ), in the control device to cease functioning. The inventive device is characterized in that it identifies that the absence of the ignition signal ((V 2 ) is due not to the fact that the ignition has been switched off, but to some other cause, for example a defect. To this end, at least individual control devices communicate, for example via a data bus, such as a CAN bus. Thus, despite the failure or absence of an ignition signal (V 2 ) in the control device (102) of the automatic clutch, the other control devices can function and emit and/or receive data via the data bus. Furthermore, as a result of the functioning of the motor control (104), for example, the motor speed, which is regulated by the motor control, can be detected, or received via the data bus. This motor speed is then used as a reference to establish the presence of an ignition signal (V 2 ) in the other measuring devices.