freightliner 108SD, Руководство пользователя

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Automatic Traction Control
The UltraShift PLUS system requires the Automatic
Traction Control (ATC) option to be enabled when
driving in soft soil/sand to prevent wheel slippage
and shifting issues. The ATC system has two modes:
"normal" (for sand and loose road surface) and a
mud/snow setting.
ATC Normal Mode
In normal mode, the system will engage the brakes
on the wheel or side that the wheel slip is occurring
to help the vehicle gain traction. The point at which
the traction control will actuate the braking system
increases with throttle: low throttle allows the system
to brake the wheels earlier; heavy/full throttle raises
the point of the acceptable wheel slip.
Adhere to the following points when driving in ATC
normal mode:
•
If using Automatic mode in soft soil and/or
sand, maintain the engine speed between
1000 and 1300 rpm to prevent unnecessary
upshifting.
•
If using Manual mode in soft soil and/or sand,
do not attempt an upshift and try to maintain
the current gear.
•
If the vehicle comes to a stop in the sand it
may be necessary to back up prior to attempt-
ing forward movement.
ATC Mud/Snow Mode
To select the mud/snow mode, depress the ATC
switch. This mode raises the wheel slip speed that is
allowed before the traction control activates. The
point at which the traction control will actuate the
braking system increases with throttle: low throttle
allows the system to brake the wheels earlier; heavy/
full throttle raises the point of the acceptable wheel
slip.
Load-Based Shifting
The UltraShift PLUS system is adaptive and will
change the shift points based on grade, engine RPM,
throttle position, and vehicle load. After changing
loads or powering up, the system needs to relearn
these inputs for the first few shifts to make the
proper adjustments.
Coasting
When coasting to a stop on level terrain, the Ultra-
Shift PLUS system may not downshift into the lower
gears. It will select a gear after the throttle is applied.
Eaton Fuller AutoShift
Automated Transmissions
Refer to the Eaton website for additional information,
www.roadranger.com .
General Information, AutoShift
Transmissions
Eaton Fuller AutoShift transmissions have ten or
eighteen forward speeds and two reverse speeds.
The driver must use the clutch to start and stop the
vehicle. However, the driver does not need to use
the clutch to shift gears. The transmission signals the
engine controller when to break torque and the en-
gine controller automatically increases or decreases
engine speed. When engine speed is correct, the
transmission engages the next gear and signals the
engine controller to resume operation.
Operation, AutoShift Transmissions
Automatic and Manual Modes
The SmartShift control lever has a slide switch lo-
cated on the body of the control lever just before the
paddle widens out. See
Fig. 14.2 . The slide switch
controls the forward driving mode, automatic (AUTO)
or manual (MAN).
To change mode at any time, move the slide switch
in the desired direction. This allows the driver to re-
spond to a wide range of driving conditions, such as
blind corners, tight curves, and steep hills.
In either mode, the gear indicator displays the cur-
rent gear. See
Fig. 14.3 .
At the start of a shift, the current gear continues to
display until the transmission has been pulled into
neutral. As the transmission is synchronizing for the
new (target) gear, the gear indicator flashes the num-
ber of the target gear.
When the shift is complete, the gear indicator dis-
plays the new gear, without flashing.
Automated and Automatic Transmissions
14.10