Self-Study Programme 480 Audi A7 sportback running gear suspension.pdf

(5307 KB) Pobierz
Self-study programme 480
Audi A7 Sportback
Running gear / suspension
Audi
Service Training
Running gear / suspension - overall concept
A major development goal for the running gear / suspension of the
Audi A7 Sportback was to achieve great agility with good control,
thus enhancing driving pleasure with high levels of safety and
comfort. The use of the proven axle concept with the five-link front
axle in connection with a trapezoidal link rear axle is the prerequi-
site for this. As already implemented in the case of Audi A8 '10 and
Audi A6 '05, adaptive air suspension (aas) will also be used on the
Audi A7 Sportback. This equipment is optional here; the series
standard equipment is a steel-sprung running gear / suspension
with conventional damping.
From a conceptual perspective, the final drive before differential
drive concept used for the first time in the Audi A5 '08 will also be
used in the Audi A7 Sportback, which means a larger wheelbase
can be implemented with a small front overhang.
In comparison with the Audi A6 '05, the wheelbase has been
enlarged by 69 mm, the track width on the front axle by 15 mm.
The layout of the steering gear on the subframe in front of the
front axle ensures the necessary exact steering response and the
precise steering feel in every driving situation.
The electrical implementation of the power-assisted steering
has enabled a reduction in the fuel consumption of a max. of
0.3 l / 100 km. Various additional functions can also be imple-
mented.
480_001
2
Contents
Running gear / suspension
Overview _____________________________________________________________________________________________________________________________________________________ 4
Axle and running gear alignment
Front axle ____________________________________________________________________________________________________________________________________________________ 5
Rear axle _____________________________________________________________________________________________________________________________________________________ 6
Running gear alignment ____________________________________________________________________________________________________________________________________ 7
Adaptive air suspension (aas)
Overview _____________________________________________________________________________________________________________________________________________________ 8
System components ________________________________________________________________________________________________________________________________________ 9
Control strategy ____________________________________________________________________________________________________________________________________________ 13
Operation and driver information _________________________________________________________________________________________________________________________ 15
Service jobs _________________________________________________________________________________________________________________________________________________ 16
Steering system
Overview ____________________________________________________________________________________________________________________________________________________ 20
Electromechanical steering
Overview ____________________________________________________________________________________________________________________________________________________ 21
System components _______________________________________________________________________________________________________________________________________ 22
Operation and driver information ________________________________________________________________________________________________________________________ 30
Service / diagnosis functions _____________________________________________________________________________________________________________________________ 30
Brake system
Overview ____________________________________________________________________________________________________________________________________________________ 32
System components _______________________________________________________________________________________________________________________________________ 33
Service jobs _________________________________________________________________________________________________________________________________________________ 34
ESP
Overview ____________________________________________________________________________________________________________________________________________________ 35
System components _______________________________________________________________________________________________________________________________________ 35
System functions ___________________________________________________________________________________________________________________________________________ 36
Operation and driver information ________________________________________________________________________________________________________________________ 37
Service jobs _________________________________________________________________________________________________________________________________________________ 38
Control unit for sensor electronics J849
Overview ____________________________________________________________________________________________________________________________________________________ 39
Design and functions ______________________________________________________________________________________________________________________________________ 39
Service and diagnosis functions __________________________________________________________________________________________________________________________ 39
Adaptive cruise control (ACC)
Overview ____________________________________________________________________________________________________________________________________________________ 40
Design and functions ______________________________________________________________________________________________________________________________________ 40
Service and diagnosis functions __________________________________________________________________________________________________________________________ 40
Wheels and tyres
Overview ____________________________________________________________________________________________________________________________________________________ 41
Low tyre pressure indicator
Overview ____________________________________________________________________________________________________________________________________________________ 42
• The self-study programme describes the fundamentals of the design and function of new vehicle models,
new automotive components or new technologies.
The self-study programme is not a Repair Manual! Any figures quoted merely serve the purpose of
facilitating understanding and relate to the version of data valid at the time the SSP was produced.
It is essential that you refer to the latest technical literature when carrying out maintenance and repair jobs.
You will find an explanation of terms that are printed in italics and marked with an asterisk in the glossary at
the end of this self-study programme.
!
Note
Reference
3
Running gear / suspension
Overview
The following running gear and suspension variants are available for the Audi A7 Sportback:
Production control
no. (PR)
1BA
Description
Standard running gear /
suspension
Sports running gear /
suspension
Sports running gear /
suspension S line as offer
from quattro GmbH
Rough road running gear /
suspension
Adaptive air suspension
Adaptive air suspension for
rough road markets
Technical implementa-
tion
Steel suspension
Trimming
0 (basic level)
Offer
Series standard
1BE
Steel suspension
-10 mm
Option
1BV
Steel suspension
-10 mm
Option
1BB
Steel suspension
+13 mm
Option
1BK
Air suspension
1BS
Air suspension
dependent on the
selected setting in
Audi drive select
Option
Option
480_002
4
Axle and running gear alignment
Front axle
The basis for the development of the front axle was the five-link
front axle already used in the Audi models A4 '08 and A8 '10.
The bearing bracket to support the upper axle link has also been
integrated in the body in the Audi A7 Sportback.
Alongside weight and rigidity optimisations, this has also enabled
a reduction in the installation tolerances of the upper axle link.
Stabilisers and shock absorbers have been reconfigured. The
assignment of the system components is shown in the diagram.
Upper axle link
− New development
Guide link
− New development
Shock absorber forks
Adopted from Audi A8 '10
Connecting link
− Adopted from Audi A8 '10
Swivel bearings
− New development
Shock absorbers
− New development
− with regulated damping
on vehicles with aas
Anti-roll bar
− New development
Subframe
− New development
Wheel hub
− Adopted from Audi A4 '10
Wheel bearings
− Adopted from Audi A4 '10
Joint
− Adopted from Audi A4 '10
Support link
− Adopted from Audi A4 '10
480_003
5

Plik z chomika:

Inne pliki z tego folderu:

Inne foldery tego chomika:

Zgłoś jeśli naruszono regulamin