freightliner 108SD, Руководство пользователя

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The Enhanced Stability Control (ESC) system offers
the capability of complete directional stability (yaw
control) in oversteer and understeer conditions to
reduce the likelihood of drift-out or jackknife. The
system determines where the driver is attempting to
steer the vehicle and how much brake demand is
required in order to more precisely control the vehicle
in an emergency situation.
ESC works by constantly comparing the driver’s in-
tention with the vehicles’ actual behavior. The system
does this by monitoring systems such as wheel
speed, steering angle, yaw rate, lateral acceleration,
throttle position, and brake application. A central mi-
crocomputer analyzes the collected data and triggers
a response to keep the vehicle on course when an
unstable condition is detected.
When the system detects that the vehicle is at risk of
rolling over, it applies individual tractor wheel end
brakes and trailer brakes, activates the engine re-
tarder (if equipped), and/or cuts engine power, de-
pending on the severity. As a result, the driver has
full control over the vehicle until the system detects a
potential rollover and intervenes accordingly. ESC
operates automatically; the driver does not monitor or
activate the system.
Roll Stability Advisor/Control
The enhanced stability system may include the roll
stability advisor (RSA) only, or it may also include the
roll stability control (RSC).
A decal ( Fig. 12.3 ) on the auxiliary dash panel, and
an amber-colored dash indicator light ( Fig. 12.4 ), in-
dicate that the vehicle is equipped with roll stability
system components. On these vehicles, the roll sta-
bility indicator light replaces the wheel spin indicator
light.
Roll Stability Advisor
IMPORTANT: This is not an advance warning
system. The roll stability advisor displays a mes-
sage only after the driving maneuver is com-
pleted.
The roll stability system uses a lateral-acceleration
sensor that monitors rollover risk. Shortly after a
curve, lane change, or other driving maneuver that
results in a rollover-risk detection, a dash warning
light illuminates, an audible tone sounds, and a driver
advisory message is displayed in the driver message
center. The purpose is to advise the driver that the
previous maneuver produced a rollover risk.
The roll stability advisor displays different text mes-
sages depending on the severity of the risk of each
occurrence of risky driving. From the highest risk
level to the lowest risk level, the system will sound
an audible alert, and display a message, as shown in
Fig. 12.5 .
NOTE: The system will calculate and recom-
mend a speed reduction value. It may be differ-
ent than the values shown here.
Bring the vehicle to an authorized service facility if a
system failure message is displayed.
Roll Stability Control
WARNING
The Roll Stability Control system is intended only
as an aid for a conscientious and alert driver.
Carefully read the information in this manual to
understand this system and its limitations. The
Roll Stability Control system is not a substitute
for safe driving procedures. Failure to drive
lamp indicates traction
OR roll control event.
Follow instructions in
driver’s manual.
24−01204−000
07/11/2003
f080125
SAFETY INSTRUCTIONS
Fig. 12.3, Roll Stability Decal
06/26/2003 f602128
Fig. 12.4, Roll Stability Indicator Lamp
Brake Systems
12.5