Electronic Stability Programme With Brake Assistance; Brake Assistance - Audi A4 2001 Owner's Manual

Running gear
Brake assistant
Investigations in accident research have
shown, that the majority of drivers fail to ade-
quately actuate the brakes in an emergency
situation.
This results in insufficient brake pressure
being generated to achieve maximum vehicle
deceleration.
This lengthens the braking distance.
Brake servo pressure sensor G294 is used for
detection of emergency braking.
For this purpose, the pressure increase gradi-
ent (pressure build-up with respect to time) is
evaluated and, if necessary, the brake assist-
ant is activated.
32
During emergency braking, the brake assist-
ant aids the driver by increasing the brake
pressure automatically, to a level exceeding
the locking limit.
The ABS ( A nti-lock b raking s ystem) is thus
quickly brought into the operating range,
which enables a maximum vehicle decelera-
tion to be achieved.
Pressure sensor G294
Time [t]
Emergency braking
Normal braking distance
SSP254_093
SSP254_092