22
-s +s± 0
Characteristic curve of springs
Owing to the functional principle, the
characteristic curve of an air spring is
progressive (in the case of cylindrical
pistons).
The progress of the characteristic curve of the
spring (flat/steep inclination) is determined
by the spring volume.
A large spring volume produces a flat
progression of the characteristic curve (soft
springs), a small spring volume produces a
steep progression of the characteristic curve
(hard springs).
The progression of the characteristic curve of
a spring can be influenced by the contour of
the piston.
Changing the contour of the piston alters the
effective diameter and thereby the resilience.
Result
The following options are available for
matching the air springs using U-bellows:
• Size of the effective surface
• Size of spring volume
• Contour of the piston
Principles of air suspension
242_026
242_027
Spring volume
Piston volume
Small spring volume
Large spring volume
(+ piston volume)
Spring travel
Supporting weight = weight of the sprung masses
6 bar
7 bar
8 bar
9 bar
242_084
Spring volume
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