TEBS E
6
GIO functions
63
6.2
Tag axle control with residual pressure maintenance
Vehicle type
Semitrailer with tag axles / trailing steering axles.
Semitrailer with tag axles and OptiTurn/ OptiLoad function see chapter 6.9 ‘Dy-
namic wheelbase control’, page
Purpose
When using tag axles, the bellows should not be completely depleted of air, other-
wise parts of the air bellows will rub against one another (wrinkling the bellows)
and cause damage.
The integrated function helps avoid tire damage, increased tire wear and possible
damage to the bellows by using a residual pressure maintenance in the support
bellows.
Installation
With tag axles, the wheel speed must be sensed and braking controlled via a sepa-
rate modulator.
WABCO recommendation: Brake the tag axle using an EBS relay valve (4S/3M
system).
An external axle load sensor e-f must also be installed to measure the bellows
pressures on the tag axle.
To control the tag axle, a pulse controlled lifting axle valve (LACV-IC) must also be
used.
It is not possible to use spring-returned lifting axle valves.
Parameter setting
An axle must be defined as a tag axle via
tab 2, Vehicle
.
The residual tag axle pressure is then defined via
tab 5, Lifting axle control
. The
residual pressure can be set as a value greater than 0.3 bar.
