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6.4 Long Travel Damper
evolution: High Angular
Displacement (H.A.D.)
Technology
Car Manufacturers request high-performance
products for increased engine torque with com-
pact size. These expectations are now covered
with the H.A.D. offer for diesel engines and pe-
trol direct injection engines.
Valeo High Angular Displacement (H.A.D.) is
a further evolution of Valeo O.E. Long Travel
Damper Technology. It is composed of a high-
tech pre-damper multi-cassette that provides
an optimized angular stiffness over the clutch
disc. This O.E. technology enables car manufactu-
rers to use a rigid flywheel instead of the Dual
Mass Flywheel technology even at high engine
torques (up to 270 Nm for passenger cars and
350 Nm for Light Commercial Vehicles)
On the front cover of this brochure, you can see
the H.A.D. clutch together with the rigid flywheel
for Fiat Scudo, Citroën Jumpy and Peugeot Expert
with 2.0HDi engine. This is not the only example,
as H.A.D. is also available for the Renault Scénic
1.9D and the Renault Fluence 1.5dCi. The choice
of clutch product depends on many factors such
as performance, efficiency and reduction of ove-
rall costs. Valeo’s R&D centres are capable of
offering a solution that is perfectly matched to
the car manufacturer’s requirements and the
given technical limitations.
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6. KIT4P design:
Long Travel Damper (L.T.D.)