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 31
0,52 0,260
-0,26-0,52
0,52 0,260
-0,26-0,52
0,52 0,260
-0,26-0,52
The force/stroke diagrams thus obtained can 
be converted into force/velocity diagrams (f-v 
diagrams). 
These characteristic curve

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AUDI A6 ALLROAD 1999 C5 / 2.G Pneumatic Suspension System 32
Principles of air suspension
Measures are taken during the design stage 
to adapt the characteristic curves to the 
requirements of suspension matching.
Shock absorbers with decreasing 
characteris

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AUDI A6 ALLROAD 1999 C5 / 2.G Pneumatic Suspension System 33
The PDC damper
In order to maintain the degree of damping 
and thereby the handling characteristics at a 
constant level between partially and fully 
laden, the Audi A6 self-levelling air suspen-
s

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AUDI A6 ALLROAD 1999 C5 / 2.G Pneumatic Suspension System 34
Principles of air suspension
The damping force is altered by means of a 
separate PDC valve integrated into the 
damper. It is connected to the air springs via a 
hose.
A variable throttle in the P

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AUDI A6 ALLROAD 1999 C5 / 2.G Pneumatic Suspension System 35
Design and function
The PDC valve inßuences the ßow 
resistance of the working 
chamber on the piston rod side 
(working chamber 1).
Working chamber 1 is connected 
to the PDC valve via bore hole

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AUDI A6 ALLROAD 1999 C5 / 2.G Pneumatic Suspension System 36
Principles of air suspension
Function during rebound at low air 
spring pressure
The piston is drawn upwards, part of 
the oil ßows through the piston valve, 
the remainder ßows through the bore

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AUDI A6 ALLROAD 1999 C5 / 2.G Pneumatic Suspension System 37
Function during compression at low 
air spring pressure
The piston is pushed downwards and 
damping is determined by the 
bottom valve and to a certain extent 
by the ßow resistance of the piston.

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AUDI A6 ALLROAD 1999 C5 / 2.G Pneumatic Suspension System 38
The Audi A6 air suspension system comprises 
the following main components:
Air springs with U-bellows are used as 
suspension elements.
PDC dampers as used as shock absorbers (see 
page 33).
The a

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AUDI A6 ALLROAD 1999 C5 / 2.G Pneumatic Suspension System 39
¥ Environmentally friendly, uses air
¥ Good operating safety due to great 
stability.
¥ Electronic control system with 
comprehensive self-diagnosis functions
¥ Maintenance-free Along with the

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AUDI A6 ALLROAD 1999 C5 / 2.G Pneumatic Suspension System 40
The air springs
The installation of the air springs on the front-
wheel drive and the quattro drive is the same 
as in the steel spring version. This allowed the 
use of the axle design from the pr