Dry Torsion Damper

The Dry Torsion Damper (DTD) reduces the rotational vibrations between the engine and transmission, caused by the torsional vibrations from the engine.

As a result, transmission is quieter and smoother. The damper system of the DTD differs from conventional dual-mass flywheels by eliminating the lubricants in the spring system. This is why it is referred to as a dry torsion damper. Due to the three-chamber system of the DTD, the overall rigidity is higher than the DMF with two chambers. The higher rigidity causes the natural frequency of the system to also be higher. Under certain circumstances, the natural frequency may be achieved by lowering the rotational speed when starting.

The DTD is basically comprised of both a primary and secondary flywheel, a spring system and a wedge package. The varying spring properties vary to allow the system a multi-stage DTD.


Technical Specifications:

Weight 14 kg

Torque class 360 Nm
Max. rotational speed 6,500 rpm
Total inertia 0,157 kgm²
Inertia primary side 0,108 kgm²
Inertia secondary side 0,049 kgm²
Max. rotational acceleration 5,500 rad/s²


DTD partial view
Comparison with DMF