METHOD FOR STARTING AN INTERNAL COMBUSTION ENGINE IN A PARALLEL HYBRID DRIVE TRAIN

摘要

The invention relates to a method for starting an internal combustion engine in a parallel hybrid drive train of a motor vehicle. In addition to the internal combustion engine, said drive train comprises an automatic transmission (1) which is provided with a drive shaft (2) that can be connected to the internal combustion engine, at least one output shaft (3) that can be connected to at least one driving axle of the motor vehicle, a mechanical transmission (4) encompassing a first and a second planetary gear set (5, 6), several clutches and brakes, and an electric machine (14) that is used as a starter/generator and/or for continuously adjusting the transmission and/or electrically driving the motor vehicle. The electric machine (14) can be connected to a first and/or a second shaft of the first planetary gear set by means of two of the clutches in such a way that the internal combustion engine can be started by actuating one of the two clutches when the vehicle is driven exclusively in the electric mode and the other clutch is closed, the internal combustion engine being started by closing the clutch (K4) which can be connected directly to the drive shaft (2) by closing the same.