Dual Mass Flywheel
Multi-Stage Vibrational Damping
ZF provides differents dual mass flywheels to meet the requirements of different powertrains. The entry level is the Mechanical Torsion Damper (MTD) for lower and and medium torque ranges. The DMF is made for different power levels as required. The single-row DMF contains a powerful external spring set. In the double-row DMF this is complemented by an internal damper. For very demanding applications the DMF is equipped with an rpm-adaptable damper.
Advantages
- Less noise
- Easier to shift gears
- Outstanding vibration damping throughout the entire rpm range
- Easily adjusted to vehicle designs
- Smooth start/stop performance
- Long service life
- Smaller dimensions
- Pull and push-type clutches possible
- Reduced fuel consumption because vehicles can be operated at lower rpm levels
Product Details
The task
Passenger car engines with optimized fuel-consumption levels are becoming ever more powerful despite smaller displacements and fewer cylinders. To drive on less fuel, the engine's usable rpm range has been shifted toward the idling range. This has led to a marked rise in rotational irregularities in the combustion engine. To continue to provide rumble-free driving and to protect the powertrain from harmfull vibrations, effective vibrational damping is needed.
The technology
The dual mass fly wheel is installed between the engine and the transmission along with the clutch cover and clutch disc. The DMF and the MTD both consist of a primary and a scondary mass, which are connected by a lubrictated spring set. The primary mass is bolted to the crankshaft and carries the starter ring gear. The primary and secondary masses are mounted such that they can rotate independently. The spring set has a modular design, which allows characteristic curves to be varied and optimized. It consists of compression springs as well as compression spring guide elements which are made of high-strength plastic. The properties of the polyamide plastics are selected by application-specific compounding.
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