Abs, Traction Control System (Tcs) & Electronic Stability Control (Esc); Antilock Braking System (Abs); Traction Control System (Tcs) - PREVOST H3-45 2023 Operator's Manual

ENGINE
DRIVER
BRAKE
PEDALS
ANY POSITION
ACCELERATOR
PEDAL
RELEASED
BRAKE PEDAL
PUSHED
ACCELERATOR
PEDAL
RELEASED
FIGURE 3: ENGINE BRAKE FORCE APPLIED
ACCORDING TO SELECTED MODE AND DRIVER PEDAL
POSITION
NOTE
Engine brake is safe to use in any road
conditions including adverse conditions.
ABS, TRACTION CONTROL SYSTEM
(TCS) & ELECTRONIC STABILITY
CONTROL (ESC)

ANTILOCK BRAKING SYSTEM (ABS)

The purpose of the Antilock Braking System
(ABS) is to maintain vehicle stability and control
during braking and to minimize the stopping
distance in any road condition.
ENGINE
BRAKE
MODE FORCE
OFF
0%
AUTO
0%
AUTO
up to 100%
1
50%
2
100%
PA-1652 Operator's Manual H3-45 Coach
On slippery roads and more generally in
emergency situations, over- braking frequently
induces wheel locking. Wheel locking greatly
increases breaking distance on any road surface.
Locked wheels also impede directional control
and cause severe tire abrasion. An antilock
braking system provides maximum braking
performance while maintaining adequate control
on slippery roads.
The basis of ABS is constant monitoring of wheel
parameters during braking. Sensors on each
wheel of the front, drive and tag axles constantly
measure wheel speed during braking. This
information is transmitted to a six- channel
electronic processor which senses when any
wheel is about to lock. Modulating valves quickly
adjust brake pressure (up to 5 times every
second) to prevent wheel lock. Each wheel is
therefore controlled according to the available
grip.
In this way, the vehicle is brought to a stop in the
shortest possible time while remaining stable and
under the driver's control.
WARNING
Vehicles following ABS- equipped vehicles may
not be able to brake as fast on slippery roads.

TRACTION CONTROL SYSTEM (TCS)

TCS controls wheel
acceleration to improve traction.
The TCS system will intervene automatically
l
and apply braking pressure to a spinning
wheel transferring engine power to the other
drive wheel that have better traction. This
feature is active only at speeds below 25
mph (40 km/h).
If all of the drive wheels begin to spin, the
l
TCS system will reduce engine throttle to
improve traction at all of the drive wheels.
If drive wheels begin to lose traction during
acceleration, TCS will engage automatically to
assist the driver in accelerating the vehicle. The
TCS icon in the DID will flash rapidly to let you
know whenever TCS is actively functioning.
Other Features 5-13
spin during vehicle