Method and control unit for determining the travel range between two gear shift element halves of an interlocking gear shift element

A method for determining an actuating-travel range between two shift-element halves (10, 11) of a form-locking shift element (A, F), the two shift-element halves (10, 11) bringable into engagement or out of engagement with each other in a form-locking manner by moving at least one of the shift-element halves (10) with respect to the other shift-element half (11), the method comprising:

• during an engagement of the form-locking shift element (A, F) and with a tooth-on-tooth position between the two shift-element halves (10, 11), monitoring an actuating movement of the at least one movable shift-element half (10) with respect to the other shift-element half (11) with a sensor;
• and
• detecting the tooth-on-tooth position when
• the actuating movement of the at least one movable shift-element half (10) in the engagement direction measured by the sensor within an actuating-travel range of the at least one movable shift-element half (10) between a disengaged condition and an engaged condition of the shift element (A, F) is zero,
• a ratio between an engagement force applied at the shift element (A, F) and a radial force acting on the shift-element halves (10, 11) is within a value range facilitating the tooth-on-tooth position, the radial force resulting from a torque applied at the shift element (A, F), and
• the sensor detects the actuating movement of the at least one movable shift-element half (10) in the engagement direction after a reduction of the engagement force, after an increase of the torque applied at the shift element (A, F), or after both the reduction of the engagement force and the increase of the torque applied at the shift element (A, F).