In the domain of the Vehicle Systems, the IMS CONNECT is a test bench for investigating all drive concepts of future mobility: The range includes manual transmissions, automatic and dual-clutch transmissions for conventional and hybrid drives, dedicated hybrid powertrains with one or two electric machines, and fully electric powertrain systems for electric and fuel cell vehicles. The focus is on research regarding efficiency and loss behaviour for powertrains optimised for real driving conditions and on software-based lightweight design.

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.

  • Measurement, modelling and identification of power losses in conventional and electrified vehicle transmissions
  • Validation of simulation models in the context of software-based lightweight design and drives optimized for real driving
  • Development and testing of electrified multi-speed powertrain systems with focus on the operating strategy and transmission control
Configuration Front-Transvers Drives, Front-In-Line Drives, Conventional Transmissions (MT, AT, DCT), Hybrid and Electric Drives
Traction Machine Possible application for transversely and in-line installed drive motors
Rated Torque 500 Nm up to 4.500 rpm
Max. Speed 10.000 rpm
Load Machines Compact design in transverse direction
Rated Torque 2.000 Nm up to 750 rpm
Max. Speed 3.000 rpm
Conditioning System Oil Temperature Control -10 °C to +150 °C
Precise Control ≤ ±3 °C
Oil Flow Measurement
Systems Software Automation System PUMA OPEN 2
Control EMCON 6
Torque Sensors Accuracy Class ≤ 0,02
Input and Output shafts
Electric Power Measurement Accuracy ≤ 0,025
DC and AC power possible
Sensor for Oil Temperature -20 °C to +300 °C
Class A according to EN 60751
I/O Connections Analog/Digital, Input/Output, CAN-connection