Motor Vehicle Comprising at Least Two Drive Motors and Comprising an Automatic Gearbox Having a Fixed Gear Ratio and a Power-Split Gear Ratio

A motor vehicle comprising:

• at least two drive motors, wherein at least one drive motor is an electric machine;
• a high-voltage battery;
• an automatic gearbox comprising:
• at least one fixed gear ratio and at least one power-split gear ratio (E-CVT);
• and/or
• at least one serial gear ratio for gear ratio adjustment towards the at least one fixed gear ratio;
• and
• an electronic control unit configured to, during a ratio adjustment between an engagement of a shift element and a loading of the shift element, in order to control an internal combustion engine and the electric machine:
• cause the shift element to be loaded with a predefined torque gradient at a first point in time at which at least one tooth-on-tooth position exists up to a second point in time;
• cause the predefined torque to be limited to a maximum permissible torque during a predefined waiting period from the second point in time up to a third point in time;
• and
• cause the shift element to be further loaded with the previously defined torque gradient after the waiting period or when an engaged state is detected.

An electronic control unit for a motor vehicle or an automatic gearbox, the electronic control unit configured to:

• during a ratio adjustment between an engagement of a shift element and a loading of the shift element:
• cause the shift element to be loaded with a predefined torque gradient at a first point in time at which at least one tooth-on-tooth position exists up to a second point in time;
• cause the predefined torque to be limited to a maximum permissible torque during a predefined waiting period from the second point in time up to a third point in time;
• and
• causing the shift element to be further loaded with the previously defined torque gradient after the waiting period or when an engaged state is detected.

A method for shifting an automatic gearbox in a motor vehicle, the method comprising:

• during a gear ratio adjustment between an engagement of a shift element and a loading of the shift element, in order to control an internal combustion engine and an electric machine:
• loading the shift element with a predefined torque gradient at a first point in time at which at least one tooth-on-tooth position exists, up to a second point in time;
• limiting the predefined torque to a maximum permissible torque during a predefined waiting period from the second point in time up to a third point in time;
• and
• further loading the shift element with the previously defined torque gradient after the waiting period or when an engaged state is detected.