The test bench set-up with two load machines allows the testing of drives in in-line and transverse configuration. A synchronous machine is used as the drive machine, which can replicate the system behaviour of both an internal combustion engine and a traction electric motor. In addition, integrated electric and hybrid powertrains including electric machines and power electronics can be investigated on the test bench.
In the context of the research cooperation Vehicle 5.0, the focus of the investigations is on drives optimized for real driving and software-based lightweight design. Testing on the test bench is of key importance for the validation of the models developed at the IMS regarding efficiency and transmission loss behaviour as well as fatigue. For the methodical investigations in the context of real driving, a conditioning system also enables the oil temperature in the transmission to be regulated between – 10 °C and + 150 °C, thus enabling the temperature dependence of various parameters to be investigated in a targeted manner. The software-based methods are validated and optimized by means of a large-scale analysis and evaluation of operating data.
In addition, the test bench is suitable for the development of new operation strategy and transmission control functions of novel electrified drive concepts. In the context of electrification, new challenges and potentials arise in the development of operating strategies, especially for multi-speed dedicated hybrid drives, which can be further investigated and optimized with the CONNECT with regard to overall efficiency. Through the functional integration of electrical machines in electrified drives, these can provide transmission functions such as speed synchronization during gear changes. On the CONNECT, model-based developed software functions for the drive system control (or transmission control) of electrified multi-speed drives are thus tested and applied.