13
-120 -80-400 0 3 6
9 12 15
4080 120
(Example: Suspension strut with auxiliary
polyurethane springs).
Advantages of progressive characteristic
curve of spring:
¥ Better matching of the suspension system
from normal to full load.
¥ The natural frequency of the bodywork
remains practically constant during
loading.
¥ The suspension is not so prone to impacts
in the case of signiÞcant irregularities in
the road surface.
¥ Better use of the available spring travel.
Rebound in mm Compression in mm
Parallel springing
Lower stop
Upper stop Rebound stop insert (in shock absorber)
Un-laden position
Design position
Auxiliary spring insert Lower stop
242_020
Spring
Auxiliary spring
