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Dual Mass Flywheel DMF

Dual Mass Flywheel- Valeo India

The Technology perfectly filters out engine torsion vibrations and improves shifting comfort in addition to noise reduction

The Dual Mass Flywheel (DMF) is the best flywheel option for vehicle efficiency and driver comfort. Every second car that rolls off the assembly line is fitted with a DMF - and that rate is continuously increasing.

Modern engines run with lower idle speeds, requiring vibration damping to start at lower speeds without compromising torque capacity.

As vehicles become more aerodynamic and chassis become lighter and more rigid, vibrations become more apparent, so the level of damping must also increase.

 

The DMF improves driver comfort and protects the sensitive gearbox and rest of the vehicle against engine vibrations thanks to two independent flywheels connected via a bearing or bushing, including a damper system

 

The primary flywheel is bolted directly to the crankshaft and contains the damping springs.

The secondary flywheel has a conventional clutch cover and a solid drive plate mounted to it.

The objective is to increase the transmission’s mass moment of inertia without increasing the mass to be shifted (flywheel weight) or in other words, to equalise the inertia between the gearbox and flywheel.

 

The engine’s inertia will absorb the mass moment of inertia for the primary side, whilst the secondary part increases the transmission’s internal inertia. The main advantage is greater angular damping which allows for maximum filtration of vibration. 

 

DMFs have been in production since the 1980s. Since then, Valeo has continued to strengthen its presence among different car manufacturers, making it a key solution provider for designing and producing suitable DMFs for improved driveline technologies.

 

Valeo proposes 5 innovative solutions: curved-spring, inner damper, LTD, Pendulum, VBlade.

For your reference

Benefits

Curved

Two sets of curved springs between the flywheels absorb the engine vibration. Curved springs are valve steel quality and can resist to very high stress during wide angle compression when filtering.

With Inner Damper

In addition to the two long curved springs, small straight springs, less sensitive to the centrifugal load, are integrated in the drive plate. Perfect for extremely demanding applications such as rear wheel drive vehicles to ensure very low vibrations at gearbox entry level.

With L.T.D (Long Travel Damper)

Two sets of three springs are operating in series and synchronised by a back plate. This combination provides optimal filtration thanks to a maximum angular displacement. Perfect for high-performance engines as well as for hybrid power trains.

Technologies

FullPACK DMF: ALL-IN-ONE solution

Valeo Kitting Offer for both hydraulic or mechanical bearings

- Easy to order: A FullPACK DMF is composed of the DMF, the disc, the cover, the bearing (either hydraulic or mechanical) and the screws. No components mismatching risk.

- Easy to stock: all components in one single box

- Easy to fit: no additional specific tools needed, all parts included.

KIT4P conversion kits

The aftermarket economical solution for demanding applications

- KIT4P replaces standard fit DMF by using a solid flywheel and a LTD system in  the clutch friction plate

- The solid flywheel durability provides excellent thermal resistance and full engine and gear box protection.

- The solid flywheel has no wear parts: no need to replace the whole clutch system a second time over vehicle lifetime.

We appreciate your interest
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