WABCO TEBS E - Drawbar Load Reduction (Optiload TM )

6
TEBS E GIO functions
84
6.9.2 Drawbar load reduction (OptiLoad
TM
)
Vehicle type
Semitrailers with 2 or 3 axles, rear axle as a tag axle or lifting axle.
Purpose
Avoid overloading the pick-up plate and towing vehicle drive axle on semitrailers
with loads that are unevenly distributed in the direction of the towing vehicle.
• The load does not have to be distributed over the load floor.
• Reduces the risk of a traffic fine due to overloading the towing vehicle.
Function
Lifting or relieving pressure on the rear axle improves the distribution of the load
between the towing vehicle and the trailer, thus avoiding overloading of the rear
axle of the towing vehicle. In this case, the rear axle of the semitrailer acts as a
counterweight to the load.
After the ignition is turned on, TEBS E determines the load status and relieves the
last axle if applicable.
With TEBS E4 the axle load is measured and the axle relieved if appli-
cable even after the start of driving until the parameterised RtR speed
is reached.
The OptiLoad function can be implemented together with the OptiTurn function.
While OptiTurn is only used in the low speed range, there is no speed limitation for
OptiLoad.
System requirements
The vehicle must be equipped with a LACV-IC on the last axle to arrest the pres-
sure.
• 4S/3M on the last axle
• LACV-IC
• Additional pressure sensor on axle e-f
Parameter settings OptiLoad
Activation condition selections
• Automatically on exceeding a speed (can be set in the parameters from 0 km/h).
• Only with partial/full load: with unladen vehicles, the function is deactivated
automatically. The ECU switches to the automatic lifting axle function.
• Manual with button (press manoeuvering assistance button 2x).
• Via SmartBoard or Trailer Remote Control.
Deactivation condition selections
• Automatic below a defined speed.
• Pressure value limitation where the function is deactivated (below the bellows
pressure defined in the parameters, the function is active).
• Manually via button; optionally via SmartBoard or Trailer Remote Control.