Turning The Acb System; Turning Off The Acb System; Maintaining A Set Following Distance - PREVOST X3-45 COACH 2018 Operator's Manual

WARNING
Even with ACB, the driver must remain alert,
react appropriately and in a timely manner,
and use good driving practices. Ultimate
responsibility for the safe operation of the
vehicle remains with the driver at all times.
Be certain that you have read all safety
warnings found in Bendix Wingman ACB
Active Cruise with Braking Operator's Manual.
The driver will benefit all the audible and visual
warnings that the system provides whether or
not ACB is turned on. In addition to the audible
and visual warnings, when the ACB is turned on
and a cruise speed is set, the driver benefits
from active interventions like engine throttle
reduction, retarder or engine brake application
and service brakes application
a set following distance .
U
WARNING
Adaptive Cruise Braking must be used only in
the same conditions that are normally
recommended for ordinary cruise control.
Refer to "Regular Cruise Control" paragraph.
TURNING THE ACB SYSTEM ON
Activation of the adaptive cruise braking is
similar to the regular cruise control activation.
Press the CRUISE rocker switch to the ON
position, accelerate the vehicle to the desired
cruising speed and then, press the SET button.
ACB is now engaged with the set following
distance and driver
Whenever the cruise control is engaged, the
ACB is also engaged. You cannot engage the
cruise control without also using the ACB
features.

TURNING OFF THE ACB SYSTEM

You can turn off the ACB system, simply by
applying service brakes, setting the CRUISE
rocker switch to the OFF position or pressing the
cruise control CANCEL button on the steering
wheel.
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Whenever the service brakes are applied by
t o help maintain
U
warnings features.
PA1627 X3-45 Operator's Manual
Controls and Instruments
intervention of the ACB or by the driver,
normal cruise will automatically be cancelled.
The driver must resume or set the cruise
mode in order for the vehicle to throttle up.

MAINTAINING A SET FOLLOWING DISTANCE

Using a radar sensor mounted to the front
bumper, the ACB system measures the distance
between the coach and the forward vehicle and
intervenes to help maintain a safe set following
distance behind the vehicle. This feature
engages automatically once the driver turns on
and sets cruise speed.
Following distance refers to the time gap,
measured in seconds, between the coach and
the vehicle ahead. The actual physical distance
between the coach and the vehicle ahead will
vary based on your set cruise speed; although
the set time gap remains the same for all set
cruise speeds. Prevost's default set time gap is
1.7 seconds.
With cruise control engaged and a cruise speed
set, you are maintaining a set following distance
between the coach and the forward vehicle:
 If the vehicle in front of the coach slows
down below your cruise control set speed,
the system will progressively intervene as
follows, in this order:
1) reduce the engine throttle;
2) apply the engine brake or transmission
retarder;
3) apply about 30% of the service brakes
available braking power in an attempt to
maintain the set following distance.
The driver must apply additional braking
power when required, to avoid collision or to
maintain a safe distance from the vehicle
ahead.
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If the ACB is actively decelerating or braking
the coach in an attempt to maintain the set
following distance at the moment when the
driver cancels the ACB system, the ACB
system will continue deceleration or braking
intervention until a safe following distance is
established, then will cancel.
Even though the cruise control doesn't
operate at speeds below 30 mph (50 km/h),
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