Patent ID: 8152691

Claim:
A shift control method of an automated group transmission comprising a multi-stage main transmission (HG), a multi-stage splitter group (VG), being connected upstream of the main transmission (HG), and a multi-stage range-change group (BG) being connected downstream from the main transmission (HG), the splitter group (VG) being connected, via a controllable separator clutch, to a drive motor, the main transmission (HG) and the range-change group (BG) both being of unsynchronized design and shifting clutches of in each case two transmission ratios in the main transmission (HG) and the range-change group (BG) being respectively combined in a common shifting packet that has two shift positions and a neutral position such that during a range change, in each case, a change between two transmission ratios at least in the main transmission (HG) and the range-change group (BG) takes place, the method comprising the step of: relieving a load on the drive motor by disengaging the separator clutch; shifting the range-change group to neutral and starting a speed management of the drive motor to bring the drive motor to a synchronous speed of a target gear; braking the main transmission and the splitter group by a transmission brake; changing the transmission ratios in the main transmission and in the splitter group; synchronizing the range-change group by partially engaging the separator clutch; engaging a desired transmission ratio in the range-change group; at least one of increasing the load on the drive motor and fully engaging the separator clutch at the same time or with a temporary overlap.