Active Safety - Audi A8 2019 Service Training

Active safety

Audi pre sense
Working within its system limitations, Audi pre sense is
able to initiate actions to protect the occupants and other
road users in certain critical situations.
The vehicle and its occupants are prepared for in the event
of a potentially imminent collision.
This is made possible by the connectivity of the various
in-car systems. The systems send data continuously to the
data bus. Other control modules are able to evaluate this
information and take appropriate action.
Depending on the Audi pre sense package (rear, side, front,
collision avoidance assist and turn assist), trucks, passen-
ger cars, motorcycles, bicycles and pedestrians can be
detected.
Airbag control module
Airbag Control Module J234 has been modified extensively
with regard to Audi pre sense. These modifications mean
that J234 can now initiate Audi pre sense actions which
were previously initiated by other control modules.
For example, Driver Assistance Systems Front Camera R242
evaluates the "image data" which it has acquired. Depend-
ing on the severity of the critical situation, the front camera
then instructs other systems to initiate actions. Such
actions can include an acute warning (brake warning) or
automatic and/or assistive braking by ABS/ESC Control
Module J104.
The ACC control module and the side assist control modules
behave similarly. They also register and evaluate driving
situations. If necessary, they can instruct other systems to
initiate actions, depending on the driving situation.
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Please note that Audi pre sense cannot prevent collisions.
It serves only to assist the driver and it can reduce the
severity of the collision.
It should also be noted that not all objects or lane makings
can be detected by the sensor or by the camera.
Pages 69 through 92 describe the Audi pre sense functions
available (dependent on model and options selected) on
the 2019 Audi A8 and how they interact with other systems
on the vehicle.
In consequence to the above-mentioned modifications, the
various modules now send their driving situation data to
Driver Assistance Systems Control Module J1121 where it is
collated and evaluated.
This merging of information (data) from different sources
is termed "data fusion". The advantage of data fusion is
that it provides a comprehensive picture of the vehicle
periphery. J1121 sends this data via the bus systems to
recipients such as the airbag control module. The airbag
control module evaluates this data and can instruct other
systems to initiate actions appropriate to the situation.