BPW ECO Tronic EBS Operating And Installation Instructions page 57

5.1.2 Trailer Control Module TrCM
Pressure loss in the supply line.
Effect on the service brake system (BBA):
When pressure in the emergency line decreases by at least
1 bar per second, the automatic braking of the towing vehicle
is activated before the pressure in the supply line drops to 2
bar. During this process, the reserve tank (connection 1-2) and
connection 21 are directly coupled. This ensures automatic
braking by the service brake system and regulation of the ABS.
Effect on service brake system reserve tanks and secondary
equipment:
In the event of a supply line rupture (red coupling head)
integrated check valves prevent the air supply from escaping
from the brake supply air tank of the trailer and the secondary
loads.
Pressure loss in a secondary load, effect on the service
brake system supply air tank:
In the event of a pressure loss in a secondary load, the integrated
charging valve ensures a „safety pressure" in the supply tank
of the service brake system.
Pressure application via coupling head brake, emergency
line not coupled:
In the event of pressure applied via the coupling head „brake"
(e.g. with activated parking brake system of the towing vehicle),
the brake supply tank and therefore the secondary loads as well
are fi lled to a pressure reduced by the overfl ow loss. The fi lling
of the secondary loads depends upon reaching the opening
pressure of the integrated charging valve. An empty / partially
fi lled brake system is therefore fi lled before coupling the coupling
head supply.
Caution Danger!
Be careful during disassembly, strong spring in the
inner part.
After installation the brake system must be checked.
When working with high pressure cleaners, keep a
safe distance of at least 50 cm.
Coupling processes
Decoupling: disconnect the supply line (red) fi rst,
and then the brake line (yellow).
Coupling: connect the brake line (yellow) and
then the supply line (red)
5.1 Brake system
Connection Designations
3
22
1-2
23
Connection designation
1 = Energy fl ow (coupling head supply)
1-2 = Energy release/fl ow (tank)
3 = Venting (spring brake)
4 = Gate terminal (coupling head brake)
21 = Energy release (EBS/ABS)
22 = Energy release (spring brake)
23 = Energy release (pressure limit valve)
24 = Energy release (pressure limit valve)
25 = Energy release (pressure limit valve)
Fig. 97
Technical Data
Operating pressure:
Operating temperature:
Weight:
Pressure limit valve:
Opening pressure:
Closing pressure:
4
21
1
24
25
Thread
M 22 x 1.5
M 16 x 1.5
M 16 x 1.5
M 16 x 1.5
M 16 x 1.5
M 16 x 1.5
M 16 x 1.5
M 12 x 1.5
p = 10 bar
e
- 40° C to + 70°C
approx. 1.8 kg
DIN 74279-C 6-22
p = approx. 6.2 bar
e
p = approx. 5.6 bar
e
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