TEBS E
6
GIO functions
113
6.23 Steering axle lock
Observe the guidelines for safe operation of steering axles.
The steering axle must be disconnected when locked.
Vehicle type
Semitrailer with steering axle
Purpose
TEBS E can be used to control a steering axle by means of a cylinder to lock it in
straight-ahead position, dependent on the speed or alternatively when reversing is
detected.
The steering axle can be locked dependent on speed to ensure steady straight-
ahead driving at high speeds. The steering axle can also be locked by monitoring
the reversing lights when reversing.
Function
A solenoid valve is used to control the cylinder. The TEBS E modulator controls the
solenoid valve depending on the speed set in the parameters.
When travelling at normal speed (e.g. > 30 km/h), the steering axle is locked by the
GIO function. If the speed specified in the parameters is exceeded, the GIO func-
tion releases the lock and the steering axle turns in when cornering.
When stationary (v < 1.8 km/h), the steering axle is locked again. The lock is main-
tained by engaging reverse gear (when reversing lights are active) to prevent
steering while reversing. If the vehicle moves forward again, the lock is maintained
up to a speed defined in the parameters (> 1.8 km/h) when it is released and only
applied again when a second defined speed is exceeded.
The steering axle can be locked with the lifting axle raised via parameter with
raised lifting axle.
Reverse detection can occur via ELEX (Parameter Reverse detection via ELEX) if
combined with a TailGUARD system, see chapter 7.1.1 ‘TailGUARD functions ‘,
page 127. No additional
connection between the reversing lamp and the TEBS E is
necessary.
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