TEBS E
5
braking system
49
5.9.8 Emergency
braking
function
Application
Integrated function in the TEBS E Modulator.
Purpose
Applying the maximum possible brake force.
Function
If the braking wish of the driver (electrical or pneumatic) is greater than 90 % of the
available supply pressure or > 6.4 bar, i.e. panic braking is evident, a steady in-
crease of braking pressure is applied up to the characteristic curve of the laden ve-
hicle and up to the possible intervention of ABS control.
The emergency braking function is deactivated again once the braking wish drops
below 70 % of the available supply pressure.
5.9.9 Test
mode
Application
Integrated function in TEBS E Modulator.
Purpose
Checking the LSV characteristic curve in a stationary vehicle.
Function
In this test mode, automatic load-dependent brake force control can be checked
depending on the hose coupling pressure and the current axle load or the current
bellows pressure.
The standstill function and the emergency brake function are deactivated for test
purposes.
Simulation start
– Switch the ignition on with the control line depressurised (service brake system
and parking brake system of towing vehicle not actuated), to switch the elec-
tronic braking system into test mode.
The standstill function and the emergency braking function are switched on
as soon as the vehicle is moving.
As soon as the vehicle exceeds 10 km/h, the test mode ends.
Vehicle laden simulation
The ‘Laden’ status can be simulated when the vehicle is unladen by depressurising
the support bellows (< 0.15 bar) or lowering the vehicle onto buffers. Correspond-
ing with the safety function ‘Vehicle on buffer’, the full braking pressures are pro-
duced.
Mechanical suspension: Unhook the linkage for the height sensor and turn the
lever to the position that corresponds with the spring-deflected vehicle.
Simulation by diagnosis
The TEBS E Diagnostic Software can be used to simulate these safety functions
via the
Control
menu.