Specifications

TEBS E2
3
Brake system
39
RSS-control is started in the unbraked or partially braked driving condition. The
RSS control is deactivated if the driver brakes heavily enough (deceleration above
the level of RSS deceleration).
If the driver defines a pneumatic or electrical braking setpoint for the trailer while an
RSS control is taking place, and this is higher than the RSS control, the RSS con-
trol is interrupted and the respective setpoint is used for the braking procedure.
The type of pressure control for the wheels on axle e-f depends on the vehicle type
and the ABS system configuration:
Vehicle type and ABS system configuration Comment
• Semitrailer with trailing steering axles with 4S/3M,
4S/2M+1M or 2S/2M+SLV
•
The MAR axle generally brakes with lower or equal pressure to
ABS control (for the corner stability of adhesion-steered axles).
• Drawbar trailer with 4S/3M
•
Semitrailer without trailing steering axle or central
axle trailer with 4S/3M or 4S/2M+1M
•
During the RSS control, the behaviour of the wheel on the in-
side of the wheel is not considered in the ABS logic.
•
As long as the inside wheel of the MAR axle does not yet lift,
the MAR axle will be braked with low pressure in order to avoid
tyre flat spots.
•
If the inside wheel of the MAR axle lifts, i.e. indicates a ten-
dency to lock up at low pressure, the pressure increases – de-
pending on the behaviour of both outside wheels.
•
The output pressure on the MAR axle can be reduced at the
outside wheel by ABS control requirements.
• Vehicles with adhesion-steered steering axle with
2S/2M+SLV (Steering axle controlled via a Select
Low Valve), 4S/2M+1M or 4S/3M+EBS/ABS (Steer-
ing axle MAR-controlled).
•
RSS on vehicles with adhesion-steered steering axle is only
possible with adjacent system configurations.
•
An adhesion-steered trailing steering axle must be clicked on in
the TEBS E Diagnostic Software see chapter 7.1 "Parameter
definition with TEBS E Diagnostic Software", page 125, Window
TEBS - ABS/RSS => After-run steering axle.
Setting the sensitivity of the RSS function for vehicles where tilting is critical
The sensitivity of the RSS function can be set in the TEBS E Diagnostic Soft-
ware see chapter 7.1 "Parameter definition with TEBS E Diagnostic Software",
page 125, Window TEBS - ABS/RSS => RSS parameter.
3.9.7 Standstill function
Application
Integrated function in TEBS E modulator.
Purpose
To avoid unnecessary current consumption if the vehicle is parked with the parking
brake applied and the ignition switch actuated.
Function
When the vehicle stops, braking is done via the redundancy circuit only. The elec-
tro-pneumatic pressure control is deactivated. The function is deactivated as soon
as the drive begins (v > 2.5 km/h).