Patent ID: 8682555

Claim:
Method for controlling a torque transmitting device during a filling phase for coupling a first torque transmitting element to a second torque transmitting element via the torque transmitting device, wherein each torque transmitting element is connected to a first shaft or a second shaft; the method comprising the steps of: providing a reference profile for a control variable, wherein a chronological progress of said control variable influences a position of a fluid actuator actuating the first and second torque transmitting elements, with respect to a pressure chamber of the torque transmitting device; determining the control variable during each coupling; operating a valve that applies a pressure source to the fluid actuator, wherein the valve is controlled during each coupling by a feed forward closed or open loop control, wherein the feed forward closed or open loop control comprises a learning loop that compensates for an increasing error between the control variable and the reference profile during the chronological progress, the learning loop processing, in preparation for the next coupling, an output signal of the learning loop of the last coupling as well as the difference between the control variable and the reference profile at the last coupling, such that the control variable follows the reference profile; and adjusting the reference profile to compensate for changing system properties that affect the coupling time and smoothness of the coupling by: determining a revolution speed of the first shaft and/or a revolution speed of the second shaft; and adjusting the reference profile with respect to a target profile for the revolution speed of the first shaft and/or the revolution speed of the second shaft by adjusting one or more parameters of the reference profile, or determining an input torque of the torque transmitting device and/or an output torque of the torque transmitting device; and adjusting the reference profile with respect to a target profile for the input torque of the torque transmitting device and/or the output torque of the torque transmitting device by adjusting one or more parameters of the reference profile.