Alfa Romeo Giulia GTA Owner's Handbook Manual page 71

if the slipping only involves one of the
drive wheels, the BLD (Brake Limited
Differential) function is activated,
automatically braking the wheel which is
slipping (the behaviour of a self-locking
differential is simulated). This will
increase the drive torque transferred to
the wheel that is not slipping.
System intervention
The intervention of the system is
indicated by the flashing of the ESC
warning light on the instrument panel, to
inform the driver that the car stability
and grip are critical.
40) 41) 42) 43) 44)
PBA (Panic Brake Assist) SYSTEM
The PBA system is designed to improve
the car's braking capacity during
emergency braking.
The system detects emergency braking
by monitoring the speed and force with
which the brake pedal is pressed, and
consequently applies the optimal brake
pressure. This can reduce the braking
distance: the PBA system therefore
complements the ABS.
Maximum assistance from the PBA
system is obtained by pressing the brake
pedal very quickly. In addition, the brake
pedal should be pressed continuously
during braking, avoiding intermittent
presses, to get the most out of the
system. Do not reduce pressure on the
brake pedal until braking is no longer
necessary.
The PBA system is deactivated when the
brake pedal is released.
45) 46) 47)
HSA (Hill Start Assist) SYSTEM
This is an integral part of the ESC system
and facilitates starting on slopes,
activating automatically in the following
cases:
uphill: vehicle stationary on a road
with a gradient higher than 5%, engine
running, brake pressed and transmission
in neutral or gear other than reverse
engaged;
downhill: vehicle stationary on a road
with a gradient higher than 5%, engine
running, brake pressed and reverse gear
engaged.
When setting off, the ESC system
control unit maintains the braking
pressure on the wheels until the drive
torque necessary for starting is reached,
or in any case for a maximum of 2
seconds, allowing your right foot to be
moved easily from the brake pedal to the
accelerator.
When the 2 seconds have elapsed,
without starting, the system is
automatically deactivated, gradually
releasing the braking pressure.
During this release stage, the typical
mechanical brake release noise can be
heard, indicating that the car is about to
move.
48) 49)
AST (Alfa™ Steering Torque) SYSTEM
50)
The AST function integrates the ESC
system with the electric power steering
to increase the safety level of the whole
vehicle.
In critical situations (braking on surfaces
with different grip conditions), through
the AST function, the ESC system
controls the steering to implement an
additional torque contribution on the
steering wheel, to suggest the most
correct manoeuvre to the driver.
The coordinated action of the brakes
and steering increases the sensation of
safety and control of the car.
ATV (Alfa™ Active Torque Vectoring)
SYSTEM
The dynamic drive control is used to
optimise and balance the drive torque
between the wheels of the same axis.
The ATV system improves grip when
cornering by sending more drive torque
to the outside wheel.
Given that, in a turn, the external wheels
of the car travel more than the internal
ones and therefore turn faster, sending a
higher thrust to the external rear wheel
allows for the car to be more stable
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