New technology, and the demands it places on modern clutch systems, requires existing systems to be developed further. The main focus is on the power flow between the engine and the transmission, including:

• Rapid, reliable separation and connection of the power flow
• Smooth moving-off
• Damping of engine vibrations
• Easy operation
• Long life without sacrificing comfort
• Minimal installation space

To meet these requirements, dynamic component inspections and operational strength tests must be carried out on coupling components and dual-mass flywheels under rotation, with the corresponding centrifugal forces. The real-world wear of clutch components and damping elements must also be examined, and torque characteristics must be determined over the angle of rotation.

The dynamic torsion testing system is designed for the operational fatigue testing of torsional vibration dampers under rotational speed. These dampers are used as damping elements in the dual-mass flywheels of modern clutch systems, where they serve to reduce the vibrations generated by the clutch and the rotating transmission masses.

The long-term behavior of the bearing and damping elements in the flywheel is examined. In addition, multi-stage torsional characteristics (clutch hysteresis loops) can be determined as a function of rotational speed during torque changes (thrust and tension).

Nominal torques of up to 2,500 Nm, along with high-frequency torsional vibrations, are generated by a spinning Hydropuls® rotary cylinder using a rotary vane principle. The cylinder rotates at a controllable speed together with the test specimen, allowing all loads that occur under operating conditions to be simulated on the specimen.