Patent ID: 8439801

Claim:
A method for controlling a drivetrain in a motor vehicle comprising an internal combustion engine having a crankshaft, an automated double-clutch gearbox having a first automated component gearbox with engagable and disengagable gears, a first gearbox input shaft, and a first friction clutch, which connects the crankshaft and the first gearbox input shaft in a separate manner and is operated in an automated fashion, a second automated component gearbox with engagable and disengagable gears, a second gearbox input shaft, and a second friction clutch, which connects the crankshaft and the second gearbox input shaft in a separate manner and is operated in an automated fashion, and a gearbox output shaft, which drives drive wheels, and a control unit for controlling the drivetrain, wherein the motor vehicle has an overrun mode and before the motor vehicle comes to a stop in the overrun mode, a shift is carried out from a gear in the second component gearbox into a starting gear in the first component gearbox, and the gear in the second component gearbox being a gear stage higher than the starting gear, and wherein the starting gear in the first component gearbox is engaged by the method comprising following steps: (A) disengaging a gear engaged in the first component gearbox if a gear is engaged in the first component gearbox, such that no gear is engaged in the first component gearbox, (B) at least partially closing the friction clutch of the first component gearbox; (C) opening the friction clutch of the second component gearbox; (D) bringing a rotational speed of the crankshaft to an above-target input shaft rotational speed by means of the internal combustion engine; (E) opening the friction clutch of the first component gearbox; and (F) synchronizing the starting gear by synchronizing the gearbox input shaft rotational speed of the first component gearbox with the gearbox output shaft rotational speed by means of a shift actuator.