METHOD FOR OPERATING A DRIVE TRAIN AND CONTROL DEVICE

摘要

A method for operating a drive train of a hybrid vehicle having a hybrid drive which comprises at least one electric machine (2) and an internal combustion engine (1), wherein an automated transmission (3) is connected between the internal combustion engine (1) and an output (4), wherein the electric machine (2) is coupled via a frictional clutch (5) to a shaft of the automated transmission (3), and wherein shifting operations are carried out in the automated transmission (3) by interrupting the drive torque which is made available at the output by the hybrid drive, in such a way that firstly in a first phase the drive torque which is made available at the output (4) is reduced, and subsequently in a second phase the actual shifting operation is carried out and then in a third phase drive torque is built up at the output (4), wherein, in order to carry out the actual shifting operation after disengagement of an actual gearspeed and before engagement of a target gearspeed, the transmission (3) is synchronized by utilizing a flywheel mass of the electric machine in such a way that when the frictional clutch (5) is opened the rotational speed of the electric machine (2) is adjusted to an inertial rotational speed, and in that the frictional clutch (5) is subsequently firstly closed for the inertial synchronization of the transmission, and is subsequently at least partially opened again.