Schaeffler, a trailblazer in motion technology, proudly announces a significant milestone, having supplied 200 million dual-mass flywheels (DMFs) to vehicle manufacturers worldwide since 1985. The DMF is an integrated spring/damping system that significantly enhances vehicle comfort and fuel efficiency, benefiting both internal combustion and hybrid vehicles.
In 1985, Schaeffler introduced this groundbreaking innovation, revolutionizing acoustic and driving comfort. The DMF effectively dampens vibrations, reduces engine noise, and aids in saving fuel. Matthias Zink, CEO of Schaeffler Automotive Technologies, emphasizes, “The dual-mass flywheel is a prime example of Schaeffler making automotive history. What began 40-odd years ago as a clever idea for damping vibration in gasoline engines has remained to this day an effective solution for improving vehicle ride comfort while also lowering fuel consumption and hence CO2 emissions.”
Schaeffler’s manufacturing prowess ensures global availability of this enduring product, with production facilities in Bühl (Germany), Szombathely (Hungary), and Taicang (China). Notably, the Bühl plant, where the DMF originated, has produced over 100 million units of this product since its inception.
The DMF was developed at Schaeffler’s Bühl campus in the 1980s. A significant breakthrough occurred in 1989 with the introduction of the arc spring damper, enhancing the flywheel’s performance while reducing overall system costs.
Originally made of cast or forged steel, Schaeffler’s expertise in metal forming led to most components being crafted from formed sheet metal parts. This innovation lightened the system and facilitated widespread adoption. By 1998, Schaeffler was producing around two million units annually.
Installed between the engine and the transmission, the DMF effectively prevents torsional vibrations generated by the engine’s piston action from reaching the transmission. This is achieved through the pendulum mass of the flywheel’s centrifugal pendulum-type absorber, countering the engine’s torsional vibrations. The result is improved ride comfort, especially at lower engine speeds.
Beyond enhancing comfort, the DMF significantly contributes to reduced fuel consumption. It enables driving within the more fuel-efficient lower engine speed range, ultimately lowering CO2 emissions.
Schaeffler’s 200 million DMFs delivered globally reflect a journey of innovation, performance, and positive environmental impact, reinforcing the company’s commitment to advancing motion technology in the automotive sector.
