Hybrid drive of a motor vehicle and method for controlling a hybrid drive

A hybrid for a motor vehicle comprising:

• an automated manual transmission (2.1, 2.2) having first and second input shafts (GE1, GE2) and a common output shaft (GA),
• the first input shaft (GE1) of the hybrid drive being connectable to a drive shaft (3) of an internal combustion engine (VM) by way of a separating clutch (K1) and being drivingly connectable to the output shaft (GA) by way of a first group of selectively shiftable gearwheel sets (G1, G3, G5, R;
• Z3),
• the second input shaft (GE2) of the hybrid drive having a drive connection with a rotor (4) of a first electric machine (EM1), which is operable as a motor and a generator, and being drivingly connectable to the output shaft (GA) by way of a second group of selectively shiftable gearwheel sets (G2, G4;
• Z1, Z2),
• the first and the second input shafts (GE1, GE2) of the hybrid drive being couplable to one another by way of an engagable and disengagable coupling-shift element (SK), and
• a second electric machine (EM2), which is operatable as a motor and a generator, comprising a rotor (5) that is drivingly connectable to the first input shaft (GE1).

A method of controlling a hybrid drive (1.1, 1.2) of a motor vehicle, which comprises an automated manual transmission (2.1, 2.2) having first and second input shafts (GE1, GE2) and a common output shaft (GA), the first input shaft (GE1) of the hybrid drive is connectable to a drive shaft (3) of an internal combustion engine (VM) by way of a separating clutch (K1) and is drivingly connectable to the output shaft (GA) by way of a first group of selectively shiftable gearwheel sets (G1, G3, G5, R;

• Z3), the second input shaft (GE2) of the hybrid drive has a drive connection to a rotor (4) of a first electric machine (EM1), which is operable as a motor and a generator, and is drivingly connectable to the output shaft (GA) by a second group of selectively shiftable gearwheel sets (G2, G4;
• Z1, Z2), the first and the second input shafts (GE1, GE2) of the hybrid drive are couplable to one another by way of an engagable and disengagable coupling-shift element (SK), the method comprising the steps of:
• shifting gears in the manual transmission (2.1, 2.2) during electric drive operation without an interruption of tractive force;
• transferring torque with a second electric machine (EM2), which is operable as a motor and as a generator, and a rotor (5) of which has a drive connection to the first input shaft (GE1), during the gear shift at least briefly to the output shaft (GA) by way of an engaged gearwheel set (G1, G3, G5, R;
• Z3) of the first group with the coupling-shift element (SK) disengaged.