The rear suspension has a 'torsion
axle' (semi-independent wheels).The advantages of this solution are:similar kinematic behaviour to independent
wheels with the relevant functional advantagesstabilizer function of the crossmemberlighterpre-ftting of the suspension before installing
it on the vehicle.The 'torsion axle' suspension is fixed to
the bodyshell by two brackets and the shock absorbers.There are two flexible bushes housed in
the ends of the arms known as 'smart' bushes, strengthened with
transversely fitted plastic rods.The bushes are ideal for filtering noise
and improving stability round bends (auto-steering). The bushes
are fitted at 600 kg on the arms and arranged at an angle of 25°.
SMART BUSHES
The torision axle has a 2.8 mm
beam. with a kinematic torsion resistance of 28 kgm
A - Conventional torsion beam: round bends the wheel steers
through the effect of lateral force Fy giving an accentuated oversteer
effect.B -Torsion axle: under lateral load Fy the wheel steers very
little and in a way 'modulated' by the rigidity of the bushes, improves
the handling of the vehicle round bends.
SMART BUSHES
The structural shape and the
high resistance properties of the material (FE220BH) has made it
possible to dispense with the anti-roll bar.The rear shock absorbers are hydraulic,
double acting with the mounting under the floor so as not to reduce
the width of the load carrying compartment and they are equiped
with upper bushes with reduced dynamic rigidity (quality of the
rubber and fastening slots) to absorb vertical forces and reduce
noise.Helical springs with end of travel buffers.
1 - Bracket fixing torsion axle to the bodyshell2 - Rubber spring upper support seal3 - Coil spring4 - Impact buffer5 - 'Smart' bush6 - Shock absorber7 - Rear torsion axle8 - Stub axle9 - Wheel hub
