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7.4 Comfortable solution
KIT4P filters vibrations and noise for essential dri-
ving pleasure. The innovative long travel dam-
per aids driver comfort and comes close to the
damping performance characteristics of a D.M.F.
KIT4P may allow increased disengagement comfort
reducing the pedal load due to greater stiffness
in the complete system, from diaphragm fingers
to crankshaft.
Depending on the application, KIT4P technology
may allow increased clutch size. This increases
the safety factor for torque transmission and
also reduces the release bearing load, conse-
quently reducing pedal load for clutch actuation.
7.5 Non-wear flywheel &
Service Kit
The rigid flywheel does not require replacement
unless there is abnormal damage on the fric-
tion surface or the starter ring. When the second
clutch replacement is due, only the cover, the
disc and the bearing need to be replaced. Valeo
offers a complete range of Service Kits for vehi-
cles equipped with KIT4P.
7.3 Efficient torque transfer
KIT4P ensures 100% torque transfer, and during
the design phase, the maximum engine torque
is considered. In addition, Kit4P efficiency is vali-
dated via benchmark tests and vehicle trials.
KIT4P runs at optimized temperature boundaries,
thus keeping the facing’s friction coefficient in
good value for increasing torque transfer capacity.
The graph below shows the friction coefficient
as a function of temperature for different facings
used in KIT4P. It is once again visible that the
temperature range between 100ºC and 270ºC
offers advantages in terms of a reduced friction
coefficient.
0,1
0,15
0,2
0,25
0,3
0,35
0,4
0,45
0,5
50
100
150
200
250
300
350
400
450
MINIMUM FRICTION COEFICIENT
TEMPERATURE (̊ C)
VDA
REQUIEREMENTS
JF840
I0146-‐01
F830DS
F820DS
F810DS
HILL START SIMULATION TEST
Friction coefficients versus pressure plate (200 mm)
mass temperature for different facing materials