Modularity Aspects for Hybrid Electric Powertrains on the Example of the Two-Drive-Transmission

摘要

The Two-Drive-Transmission (TDT) is a novel, highly efficient powertrain concept for electric or hybrid-electric vehicles. It comprises two relatively small electric machines that are each attached to a two-speed-transmission. According to the requirements either only one or both electric machines can drive the vehicle. This results in a more efficient operation of the electric motors when the vehicle is driven with low power demands. As in this case, only one of the electric motors drives the vehicle and is therefore being operated at higher loads, which increases the efficiency of the motor. Both subtransmissions use the technology of automatic manual transmissions. An interruption of traction force can be avoided by driving the vehicle with only one electric motor during a gear shift. In the meantime the other subtransmission can shift into the next gear.