AUDI A6 ALLROAD 1999 C5 / 2.G Pneumatic Suspension System

AUDI A6 ALLROAD 1999 C5 / 2.G Pneumatic Suspension System https://www.carmanualsonline.info/img/6/839/w960_839-0.png AUDI A6 ALLROAD 1999 C5 / 2.G Pneumatic Suspension System

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AUDI A6 ALLROAD 1999 C5 / 2.G Pneumatic Suspension System 21
-s +s± 0
Air spring parameters
Resilience/spring rate
The resilience (supporting force) F of an air 
spring is determined by the effective surface 
A
w and the excess pressure in the air 
spring p

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AUDI A6 ALLROAD 1999 C5 / 2.G Pneumatic Suspension System 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 char

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AUDI A6 ALLROAD 1999 C5 / 2.G Pneumatic Suspension System 23
Example of the contour of a piston
(suspension strut in the Audi allroad quattro)
Vibration dampers are available in different 
designs but their basic function and purpose 
are the same.
Hydraulic

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AUDI A6 ALLROAD 1999 C5 / 2.G Pneumatic Suspension System 24
Principles of air suspension
As previously mentioned, vibration damping 
has a fundamental effect on driving safety 
and comfort.
However, the requirements of driving safety 
(driving dynamics) and

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AUDI A6 ALLROAD 1999 C5 / 2.G Pneumatic Suspension System 25
Shock absorbers (vibration 
dampers).
Dual pipe gas-pressure shock absorber
The dual pipe gas-pressure shock absorber 
has become established as the standard 
damper.
In the dual pipe gas-pressure

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AUDI A6 ALLROAD 1999 C5 / 2.G Pneumatic Suspension System 26
Principles of air suspension
During rebound, the piston valve alone 
carries out the damping action and exerts a 
predetermined resistance against the oil 
ßowing downwards. 
The oil required in t

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AUDI A6 ALLROAD 1999 C5 / 2.G Pneumatic Suspension System 27
Single pipe gas-pressure shock absorber
With the single pipe gas-pressure shock 
absorber, the working chamber and the oil 
reservoir are located in a single cylinder. 
Volumetric changes caused by

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AUDI A6 ALLROAD 1999 C5 / 2.G Pneumatic Suspension System 28
Principles of air suspension
During rebound, oil is forced out of the upper 
chamber through the suction valve integrated 
into the piston which exerts a deÞned 
resistance against the oil. The ga

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AUDI A6 ALLROAD 1999 C5 / 2.G Pneumatic Suspension System 29
0,13 0 0 200 400 600 800 1000
1200 1400 1600
0,26
0,390,520,650,78 0,91 1,04
Advantage of this matching: 
Good response of the vehicle suspension 
ensures greater driving comfort.
The disadvantage

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AUDI A6 ALLROAD 1999 C5 / 2.G Pneumatic Suspension System 30
Principles of air suspension
The degree of damping
... (the factor which determines how quickly 
the vibrations are eliminated) 
of the vehicle body is dependant on the 
damping force of the shock