Alfa Romeo Giulia Owner's Handbook Manual page 78

AST (Alfa™ Steering Torque) SYSTEM
59)
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
and to not suffer a phenomenon called
"understeer". Understeer occurs when,
during a turn, a car tends to widen the set
76
trajectory, in this situation the lateral
acceleration the car is subjected to
becomes higher that the grip of the tyres,
which are unable to maintain the car in
the trajectory set by the driver through
the steering angle determined by turning
the steering wheel.
WARNING
36) For maximum efficiency of the braking
system, a bedding-in period of about 500 km
(310 miles) is required: during this period it
is advisable to avoid sharp, repeated and
prolonged braking.
37) If the ABS intervenes, this indicates that
the grip of the tyres on the road is nearing
its limit: you must slow down to a speed
compatible with the available grip.
38) The ABS cannot overrule the natural
laws of physics, and cannot increase the grip
available according to the condition of the
road.
39) The ABS cannot prevent accidents,
including those due to excessive speed on
corners, driving on low-grip surfaces or
aquaplaning.
40) The capability of the ABS must never
be tested irresponsibly and dangerously,
in such a way as to compromise personal
safety and the safety of others.
41) For the correct operation of the ABS, the
tyres must of necessity be the same make
and type on all wheels, in perfect condition
and, above all, of the prescribed type and
dimensions.
42) There may be a brief delay in shifting to
AWD mode after a tyre slipping event.
43) When a DTC system failure symbol
appears, the driver must be aware of the
different driving reaction and therefore
reduce the speed The symbol warns the
driver not to drive in areas that require four-
wheel drive or on snow-covered roads.
44) The ESC system cannot alter the
natural laws of physics, and cannot increase
grip, which depends on the condition of the
road.
45) The ESC system cannot prevent
accidents, including those due to excessive
speed on corners, driving on low-grip
surfaces or aquaplaning.
46) The capability of the ESC system
must never be tested irresponsibly
and dangerously, in such a way as to
compromise personal safety and the safety
of others.
47) For the correct operation of the ESC
system, the tyres must necessarily be of the
same make and type on all wheels, in perfect
condition and, above all, of the prescribed
type and size.
48) ESC performance features must not
induce the driver to take unnecessary or
unwarranted risks. Your driving style must
always be suited to the road conditions,
visibility and traffic. The driver is, in any
case, responsible for safe driving.
49) For the correct operation of the TC
system, the tyres must of necessity be the
same make and type on all wheels, in perfect
condition and, above all, of the prescribed
type and dimensions.
50) TC performance features must not
induce the driver to take unnecessary or