TEBS E
6
GIO functions
115
6.24 Forklift
control
Vehicle type
Mainly for central axle trailers with forklift transport.
Purpose
Optimising the support load, if the forklift is absent as a counterbalance.
Function
1.
2.
3.
Central axle trailers with an attached forklift are normally constructed so that, when
the forklift is attached, the weight distribution is balanced between the front and
back. A correspondingly broadly spread support load works as a counterload to the
additional weight of the forklift (Fig. 1).
If this type of central axle trailer is travelling under a partial load, but without the
forklift and with a raised lifting axle, the excessive weight of the construction can
lead to extra support load on the trailer coupling side since the counterweight of the
forklift is missing (Fig. 2).
With the function ‘Forklift control’, raising the lifting axle can be delayed with a par-
tially loaded vehicle without forklift so that the support load is not too great on the
coupling.
The axle that remains on the ground causes the wheelbase to remain short so that
the complete support load is not on the coupling, because the back of the trailer,
even without the forklift, is a more efficient counterbalance (Fig. 3).
Function prerequisites
Proximity switch or mechanical switch (roller switch) for detecting the attached fork-
lift.
The load on the trailer should be distributed evenly to prevent any additional influ-
ence by the support load.
In the case of central axle trailers with 2 lifting axles, TEBS E auto-
matically detects which axle is lifted and uses the axle on the ground
as the main axle.
Trailer EBS E uses a proximity switch or a mechanical (roller) switch to detect
whether a forklift is docked on the vehicle and automatically switches between the
two lifting axle characteristic curves:
a) Characteristic curve for controlling the lifting axle with attached forklift
b) Characteristic curve for controlling the lifting axle with unattached forklift
Both characteristics are defined by the vehicle manufacturer relative to the desired
load-dependent time for lifting the lifting axle.
Forklift control with OptiLoad
Forklift control can also be demonstrated via the OptiLoad function. In this case,
the front axle is fitted with OptiLoad instead of the rear axle. This means that the
maximum possible wheel base is always adjusted to thus preventing a negative
support load generally.