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Automated gearbox
The off-road mode provides almost uninterrupted tractive power on the driven wheels,
to keep the vehicle in motion under heavy conditions.
The off-road shift strategy features a very progressive clutch operation, ultrafast gear
shift and good transient behaviour of the engine.
The main difference between the off-road mode and the on-road mode is:
– More progressive clutch behaviour:
– to cope with the high rolling resistance, and keep the vehicle moving, and
– to prevent the engine from stalling by fast clutch opening when the accelerator
pedal is released
– Faster up- and downshifting.
NOTE:
– Do not use the manual mode when driving in the off-road mode.
In manual mode, large downshift steps cannot be made quickly.
– The off-road mode is not available in the manoeuvring mode.
– The increased wheel slip function (ASR control) is activated on selection
of the off-road mode. The ASR control is adjusted below speeds of 45
km/h so that more wheel slip is permitted. In this way, more traction is
obtained when driving off in heavy terrain.
Driving off in heavy conditions
When driving off in heavy conditions (high rolling resistance) it is important to let the
wheels do the work. The correct way to do this is to depress the accelerator pedal
quickly to the full throttle position. The off-road software recognises this situation
and closes the clutch accordingly.
CAUTION: Failure to depress the accelerator pedal quickly to the full
throttle position when driving off in heavy conditions can result in
rapid and heavy clutch wear.
– Always depress the accelerator pedal quickly to the full throttle
position when driving off in heavy conditions.
10.8 LIQUID TRANSPORT APPLICATION
If a vehicle is equipped with the liquid transport application, special software is
programmed in the electronics of the automated gearbox. This shifting program is
tuned especially for all types of tanker transport, but in particular for tanks without
partitions or driving with partly filled tanks.
The backward and forward movements of the load of these types of transport, results
in the special software modifying gear shift timing and gear selection.
The liquid transport application is selected with a switch on the dashboard. A green
LED status light in the switch is on when the liquid transport application is selected. At
the same time a pop-up in the master display shows that the application is activated.
The gearbox status does not change over key cycles. So when the ignition is switched
on and the application is still selected (switch operated) a pop-up reminder comes on
in the master display.
DW63246305.book Page 298 Friday, March 22, 2019 4:54 PM
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