When modern engines producing high-torque at low speeds became common in the 1980s, there was a need for an improved flywheel design. This need led to the development of the Dual Mass Flywheel (DMF).
The DMF design moves the damper springs inside the flywheel itself to better filter torsional engine vibrations.
This design improves efficiency while reducing emissions. Improved damping reduces strain on the transmission and improves driver comfort.
The Dual Mass Flywheel is composed of two independent flywheels, which split the inertia between the engine and transmission.
The primary flywheel is bolted directly to the crankshaft and contains the damping springs. The secondary flywheel is fitted to a clutch cover and a solid clutch disc.
The friction washers, drive plate, bearings, springs, and clutch cover are between the two flywheels.
Chris Huang