| 摘要 |
The invention relates to a method for controlling an automatic power shift transmission disposed in the drive train of a motor vehicle between a hybrid drive comprising an internal combustion engine and an electric motor and an axle drive, the input shaft (17) of said transmission being in drive connection with the hybrid drive and the output shaft of said transmission being in drive connection with the axle drive by way of a driven shaft, said transmission having a plurality of gears (G1 - G6, R), each of which capable of being engaged by selectively closing at least two of a plurality of friction-locking shifting elements (C1, G2, B1, B2, B3), wherein for purposes of stationary decoupling of the hybrid drive a first shifting element (C1) disposed on the input side and associated with the currently engaged gear (G1) is at least partially opened, and for the purposes of preventing rolling of the motor vehicle a third shifting element (B2) that is in drive connection with a second shifting element (B3) and with the output shaft is closed. The second shifting element is disposed on the output side and is associated with the engaged gear (G1). To support a driver in stopping and starting a vehicle, the third shifting element (B2) is closed at the beginning of the stationary decoupling (t1) far enough so that a braking torque (pB2) established in the shifting element (B2) generates a braking torque (pB2) that acts on the output shaft (18), said braking torque being less than a possible maximum braking torque, and being dimensioned such that a downhill rolling of the motor vehicle is only partially braked without activating a vehicle brake, and that the braking torque (pB2) generated is released at the end of the stationary decoupling (t2) by completely opening the third shifting element (B2). |
