Method for controlling an automated friction clutch

1. A method for controlling an automated friction clutch arranged in a drive train between an internal combustion engine and a gearbox, comprising:

operating the friction clutch by a clutch actuator controlled by means of a controller;

transmitting first torque from the internal combustion engine by means of the friction clutch;

estimating, using engine torque provided by an engine control unit of the internal combustion engine, the first torque transmitted by the friction clutch;

generating a target torque by adding a safety margin to the estimated torque;

operating the friction clutch in an engaged state at the target torque;

when the target torque is lower than the first clutch torque from the internal combustion engine transmitted by the friction clutch:

increasing the target torque;

increasing slip until a specified slip is reached in the friction clutch; and

generating, in response to reaching the specified slip, an adjusted clutch torque; and

adapting the adjusted clutch torque as the target torque.

2. A method for controlling an automated friction clutch arranged in a drive train between an internal combustion engine and a gearbox, comprising:

operating the friction clutch with a clutch actuator controlled by means of a controller using a control variable of the clutch actuator, the control variable associated with a target torque to be transmitted by the clutch;

transmitting first torque from the internal combustion engine by means of the friction clutch;

estimating, using engine torque provided by an engine control unit of the internal combustion engine, the torque transmitted by the friction clutch;

generating a target torque by adding a safety margin to the estimated torque;

operating the friction clutch in an engaged state at the target torque; and,

when the target torque is greater than the first clutch torque from the internal combustion engine transmitted by the friction clutch:

reducing the target torque so that the target torque is lower than the control variable; and,

tightening the friction clutch.

3. A method for controlling an automated friction clutch arranged in a drive train between an internal combustion engine and a gearbox, comprising:

operating the friction clutch by a clutch actuator controlled by means of a controller;

transmitting first torque from the internal combustion engine by means of the friction clutch;

estimating, using engine torque provided by an engine control unit of the internal combustion engine, the torque transmitted by the friction clutch;

generating a target torque by adding a safety margin to the estimated torque;

operating the friction clutch in an engaged state at the target torque; and,

when the target torque is greater than the first clutch torque from the internal combustion engine transmitted by the friction clutch:

reducing the target torque;

tightening the friction clutch;

reducing a specified slip of the friction clutch until the friction clutch is no longer slipping;

disengaging the friction clutch until the friction clutch slips at the specified slip; and,

changing the target torque to the torque of the friction clutch at the specified slip.