Audi A6 242 - Conventional Steel Spring Systems

14
When the vehicle is stationary, the vehicle
body retracts by a certain spring travel
depending upon the load. In this case, we
speak of static compression: s
stat
.
The disadvantage of conventional running
gear without self-levelling is its reduced
spring travel at full load.
Conventional running gear
(steel springs) without self-
levelling
Spring travel
The overall spring travel s
tot
required for
running gear without self-levelling is
comprised of the static compression s
stat
and
the dynamic spring travel caused by vehicle
vibrations s
dyn
for both laden and un-laden
vehicles.
s
tot
= s
stat
+ s
dyn(un-laden)
+ s
dyn(fully laden)
Principles
242_075
Steel suspension
fully laden
Design position
Un-laden position
Supporting force in kn.
H
V
H
H
L
dyn. rebound
s
stat
(un-laden)
dyn. compression
(un-laden)
(fully laden)
10
8
6
4
2
+80 mm
-40 mm-80 mm
H
V
= height when fully laden
H = design position height
H
L
= height when un-laden
Characteristic curve of spring
s
stat(un-laden)
s
stat(fully laden)
+40 mm
0