HYBRID PROPULSION FOR A MOTOR VEHICLE AND METHOD FOR OPERATING SAME IN THE STARTING PHASE

摘要

The invention relates to a propulsion system for a motor vehicle, comprising an internal combustion engine (1) and at least one electric machine (6, 6') which can each on their own serve as a drive motor for the motor vehicle. The propulsion system is configured in such a way that the motor vehicle is started as follows: i) first the vehicle is accelerated only by the electric machine (6, 6'); ii) in the meantime the internal combustion engine (1) is started; and iii) the internal combustion engine (1) takes over the propulsion of the vehicle. To avoid jerky coupling of the internal combustion engine (1) during steps i) to iii), either a) the internal combustion engine (1) is dragged while the electric machine (6, 6') accelerates the vehicle, or b) the internal combustion engine (1) is revved in preparation for starting while decoupled from the propulsion system and then coupled to the propulsion system when the rpms are synchronous. The invention also relates to a method for running such a propulsion system.