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Driving systems
Combined drive/brake cruise control
Combined drive/brake cruise
control
Combined drive/brake cruise control
is able to control both the engine and
the retarder. The system maintains a
stored cruising speed provided there is
sufficient engine power output or re-
tarder braking torque available (with a
tolerance of +4 km/h on downhill gradi-
ents). On level surfaces and on uphill
gradients, the speed is regulated by the
engine (drive cruise control). On down-
hill gradients, the speed is regulated by
the retarder (brake cruise control). The
speed is maintained constant only for
as long as the braking performance of
the retarder remains sufficient for this to
be possible. Whenever necessary, shift
down and reduce speed manually.
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TRAVEGO / TRAVEGO M / TRAVEGO L (Euro VI)/07.2014 GB
Danger.
To maintain the stored speed, combined
drive/brake cruise control automatically
operates either the engine control in or-
der to accelerate the bus (drive cruise
control) or the engine brake and retarder
to decelerate the bus (brake cruise con-
trol). Combined drive/brake cruise con-
trol is unable to interpret road and traffic
conditions itself. For this reason, do not
activate combined drive/brake cruise con-
trol on slippery road surfaces, in fog or in
difficult road and traffic conditions. You
could fail to recognise dangers in good
time, and endanger yourself and others.
When driving on a slippery road surface,
the wheels could lock and the bus could
skid.
Danger.
The cruise control function is only an aid
designed to assist driving. The driver is
responsible at all times for the speed
of the bus and for maintaining an ad-
equate distance to the vehicle in front.
Do not use cruise control unless traffic
conditions permit a constant speed to be
maintained. On steep uphill or downhill
gradients, it may not be possible for a
constant speed to be maintained. Take
your foot off the accelerator pedal when
cruise control is active.
Note:
The retarder may be activated for ad-
ditional braking force. The cruise con-
trol system will remain active. The ser-
vice brake may also be applied while the
bus is being braked by the retarder. The
cruise control system will remain active.
If cruise control is braking the bus us-
ing the retarder, the retarder will not be
deactivated if the service brake is then
applied. As soon as the retarder is de-
activated, the bus will accelerate to the
previously stored speed.
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