Control unit for a motor vehicle, and method to control the motor vehicle

A control unit (8) for operating a motor vehicle having a hybrid drive (1) with an internal combustion engine (2), an electric motor (3), a separating clutch (4) connected between the internal combustion engine (2) and the electric motor (3) and a transmission (5) connected between the hybrid drive (1) and a driven end (6), the control unit (8) configured to:

• when a defined target differential speed is set for the separating clutch (4), determine a power transmission factor depending on the defined target differential speed and an internal combustion engine-driven torque to be transmitted by the separating clutch (4);
• determine an actuating pressure for the separating clutch (4) depending on the power transmission factor;
• control the separating clutch (4) according to the actuating pressure;
• ascertain an actual differential speed forming at the separating clutch (4) with the actuating pressure;
• determine a corrected power transmission factor with a controller (10) of the control unit (8) depending on a deviation between the defined target differential speed and the actual differential speed;
• determine a corrected actuating pressure for the separating clutch (4) depending on the corrected power transmission factor and the internal combustion engine-driven torque to be transmitted;
• and
• control the separating clutch (4) according to the corrected actuating pressure.