Dual Mass Flywheel Calming the drive train The LuK Dual Mass Flywheel (DMF) has been used by car manufacturers as original equipment for decades. Why? Because excellent noise and vibration damping is extremely important in order to satisfy the increasing demands for driving comfort. A clutch system therefore must not only ensure safe coupling and decoupling of engine and transmission, but also absorb vibrations to prevent gearbox rattle and body boom. Torsional vibration with conventional flywheel 1/min 50 0-50 Torsional vibration with DMF 1/min 50 0-50 Engine Transmission t Engine Transmission t Less vibration in the drive train more momentum in your business The DMF provides technical benefits manufacturers cannot ignore! As a supplementary part of the clutch, the DMF is positioned between the engine and the transmission to neutralize vibration and relieve the strain on the crankshaft. Thus the DMF meets the ever greater demands for smooth running, driving comfort and fuel efficiency. The DMF, like the clutch itself, is subject to normal wear and tear. It is therefore important to test and replace the DMF, if necessary. In summary: fulfills the increased demand for driving comfort reduces noise and fuel consumption must also be checked during a clutch repair and replaced if necessary cannot be retrofitted
ORIGINAL EQUIPMENT
The number of new vehicles fitted with a LuK Dual Mass Flywheel continues to increase. 80 70 60 50 40 30 20 10 0 2000 2002 2004 2006 2008 2010 million passenger cars
A success story Since its launch in 1984, the LuK Dual Mass Flywheel (DMF) has been fitted as original equipment in more and more car models. And that for a very good reason where a conventional single-mass clutch and rigid flywheel reach their limits, the DMF, with its decoupled dual masses and a torsion angle of up to 180, can absorb much more oscillating energy.... with a thriving future! Today, every second passenger car or light commercial vehicle which rolls off the assembly line is equipped with a DMF and that share is still increasing! The trend towards more engine torque and more gear speeds ensures excellent prospects for the DMF. Because the DMF offers just what the market needs: more driving comfort and less fuel consumption. And due to the increasing market share in the OE sector, the DMF s business potential in the aftermarket is also growing. In short: a success story for more than 20 years expanding market share in original equipment (every second car in Europe)
The characteristics of each DMF are precisely designed for its corresponding application. Springs, dampers and masses must be perfectly harmonised with the vehicle s drive train components.
OE quality in its full variety The DMF is on the way to becoming an OE standard in passenger cars and light commercial vehicles with almost every leading vehicle manufacturer. The list of makes and models ranges from A as in Audi to V as in Volvo and speaks for itself. The following vehicle manufacturers trust in superior original equipment quality made by LuK: Audi, Bertone, BMW, Chevrolet, Citroën, Fiat, Ford, Honda, Hyundai, Jaguar, Jeep, Kia, Lancia, Land Rover/Range Rover, LDV, Mazda, Mercedes- Benz, MG, Mini, Mitsubishi, Nissan, Opel, Peugeot, Porsche, Puch, Renault, Rover, Saab, Seat, Ssangyong, Suzuki, Toyota, Vauxhall, Volkswagen, Volvo.
Europe relies on the DMF. Be ready! In order for you, the independent workshop, to benefit most from the DMF, LuK strives to make its handling as easy as possible. The following useful advice helps you to detect wear and tear and damage patterns on a DMF. Identify, verify, act! The basic rule is: A DMF cannot be repaired, it must be replaced. Whether or not a DMF requires replacement can be determined by the following symptoms: Friction surface A: Scoring marks on the friction surface are caused by the rivets of a worn out clutch. Torque can no longer be transferred and the friction surface is subjected to continued wear. DMF outer edges : Blue/purple discolouration at the outer edges, on the connecting bars where the DMF is bolted to the crankshaft, on the back side as well as other visible damage indicates that very high thermal loads were applied. Friction surface B: Cracks in the friction surface occur as a result of thermal overload, caused e.g. by a worn out clutch disk. The DMF s operational reliability is no longer maintained. Plain bearing: Radial bearing clearance of up to 0.17mm is within the limits of normal wear and tear. Caution: If clearance exceeds 0.17mm, increased tilting movement of the secondary flywheel occurs. Starter ring gear: A heavily worn starter ring gear is caused by a defective starter, this can be accompanied by noise emission at engine start-up. Sensor ring: Bent sensor ring teeth indicate mechanical damage and are detrimental to the smooth running of the engine. Grease egress: Little grease egress is no reason for concern. If however more than 20g have leaked, the amount of grease left in the housing is no longer sufficient to ensure effective lubrication of the DMF components.
A smooth ride in more than 45 million cars in Europe The Dual Mass Flywheel for efficient vibration damping.
For further information please contact: Phone: +49 (0) 18 01-753-333 Fax: +49 (0) 61 03-753-297 E-Mail: LuK-AS@Schaeffler.com Internet: www.luk-as.com 999 6002 360 1768/5.0/8.2007/GE-GB