Method for driving a parallel hybrid drive train of a motor vehicle with several drive units

A method of driving a parallel hybrid drive train (1) of a motor vehicle (19) having, as drive units (2, 3), at least one internal combustion engine (2), at least one electric motor (3), and an output (5), and a friction locking shifting element (7), along the drive train (1), the electric motor (3) is located between the internal combustion engine (2) and the output (5), the friction locking shifting element (7) is located between the internal combustion engine (2) and the electric motor (3), and a hydrodynamic torque converter (8A) is located between the electric motor (3) and the output (5), the method comprising the steps of:

• determining a target drive torque (m_2, m_3) depending on one of a target output torque (m_drive_target), an actual turbine torque (n_t_actual) of the hydrodynamic torque converter (8A), and an equivalent speed value (n_ab) of the parallel hybrid drive train (1) and an actual speed (n_3_actual) of the electric motor (3) via inverse converter recognition of the hydrodynamic torque converter (8A);
• and
• applying the target output torque (m_drive_target), which is subject to slip of the hydrodynamic torque converter (8A), to the output (5).