Iveco Stralis AT/AD. Manual — part 340
002053t
Compressed air connections:
11 -
Power from the axle reservoir
12 -
Power from the axle reservoir
13 -
Power from the redundancy valve
21 -
Output for the left axle brake cylinder
22 -
Output for the right axle brake cylinder
3
-
Vent to the outside air
Electrical connections:
61.1 - Power positive (ECU X2 pin 7)
61.2 - Common negative
61.3 - CAN line (ECU X2 pin 4)
61.4 - CAN line (ECU X2 pin 1)
62.1 - Right wheel speed signal
62.2 - Right wheel speed signal
63.1 - Left wheel speed signal
63.2 - Left wheel speed signal
66.1 - Right wear sensor positive (pin A)
66.2 - Right wear sensor positive (pin B)
66.3 - Right wear sensor signal (pin C)
67.1 - Left wear sensor positive (pin A)
67.2 - Left wear sensor negative (pin B)
67.3 - Left wear sensor signal (pin C)
III.144
ELECTRONIC SYSTEMS
S
TRALIS
AT/AD
Base - January 2003
002055t
002056t
002110t
Compressed air connections
1
-
Power from axle reservoir
2
-
Output for axle modulator
3
-
Vent to outside air
42 -
Control from distributor
Electrical connections:
6.1 -
Power positive (ECU X2 pin 8)
6.2 -
Negative (ECU X2 pin 12)
This component consists of an electro valve and a power relay valve: Its purpose is to guarantee rear axle braking even in total
EBS system breakdown conditions.
ELECTRONIC SYSTEMS
III.145
S
TRALIS
AT/AD
Redundancy valve (for 4x2 e 6x2 carriages)
The purpose of this component is to supply compressed air power to the trailer and its braking in various operating conditions.
It guarantees service braking via the electronic center electrical control, safety braking in electrical control breakdown conditions
via compressed air pressure from the duplex distributor, parking braking via the hand distributor control and emergency braking
in duct breakdown conditions via the integrated modulated servo switch device.
60933
000827t
000807t
Compressed air connections:
11 -
Power from the reservoir
21 -
Output for the automatic half-shaft
22 -
Output for the moderable half-shaft
42 -
Control from the duplex distributor
43 -
Control from the manual distributor
3
-
Discharge
Electrical connections:
6.1 -
Positive for sensor (ECU X2 pin 13)
6.2 -
Negative for sensor (ECU X4 pin 3)
6.3 -
Signal from sensor (ECU X2 pin 14)
6.4 -
Electro valve negative (ECU X2 pin 10)
6.5 -
Electro valve positive (ECU X2 pin 11)
PERSPECTIVE VIEW
WIRING DIAGRAM
III.146
ELECTRONIC SYSTEMS
S
TRALIS
AT/AD
Base - January 2003
000841t
000840t
Sensors continuously supply the electronic center with all the data it requires to properly pilot the electro valves.
Signals are obtained from magnetic flow lines that close through the teeth of a teethed wheel facing the sensor and rotating
together with the wheel.
Passage from full to empty due to the presence or absence of the tooth causes sufficient magnetic flow variation to create induced
electromagnetic force at sensor terminals and thus an alternating electrical signal that is sent to the electronic center.
The clearance between the sensor and wheel, called air gap, must obviously be at a pre-set value of 0.8
÷ 1.6 mm for proper signals
to be sent. Resistance of each sensor at connection terminals is between 1 and 2 kW.
The toothed wheel is called sound wheel because the signal it generates has the same frequency as a sound wave.
The frequency of this signal serves to define wheel rotation speed.
Frequency variations, or the speed at which signals follow one another, define acceleration and deceleration rates.
000842t
SOUND WHEEL (A) AND SENSOR (B) PERSPECTIVE VIEWS
AIR GAP
A. Magnetic flow lines
A
B
B
A
A
ELECTRONIC SYSTEMS
III.147
S
TRALIS
AT/AD
Sound wheel and speed sensor 88001
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