Dual Mass Flywheels were introduced to dampen driveline vibration and noise more effectively. The need for this escalated due to increased torque in modern engines (especially diesel engines) and consumers expectations of noise and vibration.
A Dual Mass Flywheel (DMF) is comprised of two flywheels that work together with dampening springs or planetary gears to reduce noise and vibrations.
As the driveline dampening occurs in the flywheel most DMF clutch discs do not contain springs but are generally cushioned to give smooth engagement.
Although DMF’s are very effective at dampening driveline noise and vibration they have 4 major downfalls.