The paper-based friction pairs are widely used in the multidisc wet clutches in the transmission system of commercial and
civil
cars.Paper-based
friction material
has
porous microstructure,
enabling
the
lubricant
to
reach
the
contact interface
and
providing
lubrication.As
power
shift
and
torque
transfer
devices,
wet
clutches
frequently
work
under extremely
poor working
conditions,
for
instance,
high
initial
relative
sliding
velocity,
high
surface
pressure,
and
high temperature
rise.It
is
essential
to
investigate
the
frictional
performance
of
friction
pairs
to
optimize
the
design
of wet clutches and improve the performance of vehicle.