Audi A8 2019 Service Training page 90

Process diagram showing how Audi Pre sense front responds automatically to pedestrians/cyclists
Key:
Visual advance warning
and/or indication of cor-
rective action
Reconfiguration of
hydraulic brake assist
Closing of the side
windows apart from a
residual gap
Driver take-over prompt
Assistive brake intervention phase
When the driver applies the brakes a target braking maneu-
ver can be performed in all of the phases described above
(prefilling of the brake system, reconfiguration of hydraulic
brake assist, prewarning, acute warning, automatic
braking). During the target braking maneuver the Audi pre
sense front system calculates whether the driver has
applied sufficient braking to be able to prevent a collision.
If this is not the case, the required amount of braking is
increased (up to maximum level depending on the situation).
Depending on the situation, ABS/ESP Control Module J104
can instruct the hazard warning flashers to be activated.
86
Audible warning beep
Acute warning by braking
impulse
Closing the panoramic
sunroof
Depending on the situation, the following additional
actions may be initiated:
› Closing the panoramic sunroof.
› Closing of the side windows apart from a residual gap.
› Partial tensioning of the electrically reversible seat belt
tensioners.
› Display of corrective action by Audi pre sense in the
instrument cluster.
If the vehicle brakes itself to a standstill without driver
intervention, a driver take-over prompt appears in the
instrument cluster and further audible signals sound. These
signals will alert the driver to the fact that he must actively
take control of the vehicle (for example, by applying
braking). If the driver fails to take control of the vehicle,
the system will release the brake and the vehicle will start
to move.
Prefilling of the brake
system
Automatic braking up to
emergency braking inten-
sity
Partial tensioning
662_163