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  
11 
OJL1BA
OYF
 
Spring allocation table (e.g. A6 front axle 1BA)
PR-No. weight 
class, front axleAxle load (kg) Suspension, left and right 
(spring rate)Colour coding  
Standard
running 
gear
e.g.

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AUDI A6 ALLROAD 1999 C5 / 2.G Pneumatic Suspension System  
12 
00
 
Characteristic values of 
springs 
Characteristic curve/spring rate of springs 
We can obtain the characteristic curve of a 
spring by producing a forces/travel diagram. 
The spring rate is

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

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

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AUDI A6 ALLROAD 1999 C5 / 2.G Pneumatic Suspension System  
15 
DeÞnitions: 
The  
un-laden position 
 ...
... is the compression exerted onto the wheels 
when the vehicle is ready for the road (fuel 
tank completely Þlled, spare wheel and 
vehicle tools p

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AUDI A6 ALLROAD 1999 C5 / 2.G Pneumatic Suspension System  
16
Principles of air suspension
Self-levelling air 
suspension
Air suspension is a controllable form of 
vehicle suspension.
With air suspension, it is simple to achieve 
self-levelling and it is th

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AUDI A6 ALLROAD 1999 C5 / 2.G Pneumatic Suspension System 17
In addition to the main advantages offered by 
self-levelling, its realisation by means of air 
suspension (Audi A6) offers another 
signiÞcant advantage. 
As the air pressure in the air springs i

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AUDI A6 ALLROAD 1999 C5 / 2.G Pneumatic Suspension System 18
Principles of air suspension
Another beneÞt is the principle-related 
progressive characteristic curve of an air 
spring.
With fully supporting air suspension on both 
axles (Audi allroad quattro)

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AUDI A6 ALLROAD 1999 C5 / 2.G Pneumatic Suspension System 19
Design of the air springs:
In passenger vehicles, air springs with 
U-bellows are used as suspension elements. 
These allow greater spring travel in restricted 
spaces.
The air springs consist of:

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AUDI A6 ALLROAD 1999 C5 / 2.G Pneumatic Suspension System 20
Principles of air suspension
High-quality elastomer material and 
polyamide cord woven inserts (stability 
supports) provide the U-bellows with good 
unrolling characteristics and a sensitive 
resp
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