Iveco Stralis AT/AD. Manual — part 331
Increased competition in the transportation business has also caused increased basic braking system requirements, logically satisfied
with the introduction of EBS electronic control braking systems.
It is a permanent integrated management braking system for tractor and trailers that integrates ABS, ASR and EBL systems.
The system consists of a compressed air and an electrical system containing the following components:
Electrical transmitter duplex distributor, front axle proportional relay valve, front axle ABS valve, axle electrical and compressed
air modulator and trailer control servo distributor.
The EBS system dialogs with the centers of the other units:
Engine, Ecas, transmission decelerator via the CAN line (VDB Vehicle Data Bus).
Advantages of the EBS
Reduced maintenance costs.
The EBS combines several different functions, the objective being to minimize maintenance costs at maximized braking safety and
minimizing brake pad wear.
Individual controls to front and rear axle pad wear parameters harmonize pad wear and homogeneous load distribution to all
wheel brakes minimizes overall consumption. Additionally, maintenance intervals and pad replacement also coincide. This
dramatically reduces downtime costs.
Owners can achieve substantial savings according to maintenance required for a motor vehicle and other factors. Comparison
of brake system maintenance costs for a vehicle with EBS and one with a conventional braking system underscores great cost
cutting.
Tractor and Trailer Compatibility at all times
Especially when changed frequently often with conventional systems, harmonizing the braking processes of the entire tractor and
trailer combination is unsatisfactory.
Inadequate balance, such as a trailer with scant braking efficiency, causes unequal brake pad wear.
The EBS identifies all tractor and trailer incompatibility and automatically harmonizes braking. Brake maintenance costs are not
only optimized but safety and comfort are also maximized when brakes operate in the best possible conditions.
Complete Diagnostic Structures
The EBS offers vehicles owners constantly updated information on braking system and basic brake component conditions. This
enables prior organization of maintenance periods. The EBS monitors all braking system functions and basic components.
All defects identified by the system are carefully displayed, so maintenance specialists can readily correct them.
The high degree of safety the EBS guarantees is due to several factors, as follows:
- Reduced front and rear tractor and trailer axle response and pressure accumulation times.
- Improved ABS function.
- Tractor and trailer balanced at all times.
- Constant service braking system monitoring. The EBS warns the operator of reduced brake efficiency.
- The integrated ASR function enables optimum motor vehicle stability and optimized traction.
III.108
ELECTRONIC SYSTEMS
S
TRALIS
AT/AD
Base - January 2003
OUT
AXLE pressure
REAR AXLE pressure
Moderable trailer pressure
The objective of the electronic center is to slow the vehicle down as fast as possible ensuring stability and avoiding the tendency
to block wheels.
The center is informed of the following to reach this objective:
- desired deceleration via internal duplex distributor sensors;
- pressure data retrieved via internal component pressure sensors;
- deceleration reaction due to pressure data retrieved via speed sensor signals.
Continued data monitoring and processing to the objective set identifies modulating valve activation and braking action
optimization.
IN
Desired deceleration
Braking pressure
Wheel speed
CENTER
OBJECTIVE
n Slip = 0
ELECTRONIC SYSTEMS
III.109
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TRALIS
AT/AD
Operating logic
002817t
III.110
ELECTRONIC SYSTEMS
S
TRALIS
AT/AD
Base - January 2003
ELECTRONIC SYSTEMS
III.111
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TRALIS
AT/AD
Ref.
Description
Component code
1
Direction right lever
54030
2
Push buttons on the steering wheel
-
3
Steering Wheel Interface
86123
4
Cluster
50005
5
Body Computer
86116
6
3rd axle right wear sensor
88011
7
3rd axle right wear sensor
88011
8
APU
61104
9
RFC
86118
10
Stop signal
34000
11
EDC centre
85150
12
Engine brake electro valve
78050
13
VGT electro valve
78248
14
Eurotronic centre
86004
15
Intarder centre
86015
16
EBS centre
88005
17
Duplex distributor
78059
18
7-pole trailer connection junction
72006
19
ASR cutout low pressure switch
-
20
Redundancy valve
78061
21
Axle electrical/compressed air modulator
88006
22
Right axle speed and wear sensors
88008
23
Left axle speed and wear sensors
88008
24
ASR 3rd axles cutout electro valve
78060
25
ASR function limit switch
52056
26
Trailer servo distributor
78058
27
Left axle speed and wear sensors
88007
28
Left ABS electro valve
78052
29
Proportional relay valve
78057
30
Right ABS electro valve
78052
31
Right axle speed and wear sensors
88007
32
30-pole diagnosis connector
72021
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