Engine Iveco C10/C13/C78/Cursor 13/Cursor 78. Instruction - page 16
Figure 102
Boosting pressure transmitter
Specifications
Supplier
BOSCH
Code
B 281022 018
Operating pressure field
50
÷ 400 kPa
Max. tightening torque
10 Nm
Figure 103
TECNICAL VIEW
8521
8522
MAX ABSOLUTE PRESSURE SPECIFICATIONS 600 KPA
30 100
200
300
400
P
[kPa]
1
2
3
4
5
U
[V]
A
PERSPECTIVE VIEW
8523
SECTION 3 - INDUSTRIAL APPLICATION
41
Pin
Function
Cable colour
1
To pin 12 of EDC control unit
–
2
To pin 23 of EDC control unit
–
3
To pin 17 of EDC control unit
–
Figure 104
Air temperature transmitter on manifold
Specifications
Supplier
BOSCH
Max. tightening torque
35 Nm
The device should be marked with the supplier’s identification, catalogue number and date of manufacture.
TECHNICAL VIEW
8531
WIRING DIAGRAM
PERSPECTIVE VIEW
8533
8530
RESISTANCE TREND
8532
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SECTION 3 - INDUSTRIAL APPLICATION
Pin
Function
Cable colour
1
To pin 21 of EDC control unit
–
2
To pin 4 of EDC control unit
–
PRE/POST-HEATING RESISTANCE
The resistance is ~ 0,7 Ohm.
Such resistance is placed between the cylinder head and the suction manifold. It is used to heat up air during pre/post-heating
operations.
When the ignition key is inserted, should any one of the temperature sensors — water, air, gas oil — detect a value below 10
°C,
the electronic control unit will activate pre/post-heating and turn on the relevant dashboard warning light for a variable time
depending on the temperature.
After that time, the warning light starts blinking thus informing the driver that the engine can be started.
When the engine is running the warning light goes off, while the resistance is being fed for a certain time as a result of post-heating.
If the engine is not started, with the warning light flashing, in 20 / 25 seconds, the operation is cancelled to prevent draining the
battery.
On the contrary, if reference temperatures are over 10
°C, when the ignition key is inserted the warning light comes on for about
2 seconds and carries out the test and then goes out to signal that the engine can be started.
Figure 105
001256t
SECTION 3 - INDUSTRIAL APPLICATION
43
EDC SYSTEM FUNCTIONS
The MS6.2 electronic center manages the following main functions:
Fuel injection
Accessory functions
Self-diagnosis
Recovery
It also enables:
Interfacing with other electronic systems (if any) available on the vehicle
Diagnosis
Fuel dosing
Fuel dosing is calculated based on:
-
accelerator pedal position
-
engine rpm
-
quantity of air admitted.
The result can be corrected based on:
-
water temperature
or to prevent:
-
noise
-
fumes
-
overloads
-
overheating
Pressure can be adjusted in case of:
-
engine brake actuation
-
external device actuation
-
serious defects involving load reduction or engine stop.
After determining the mass of air introduced by measuring its volume and temperature, the center calculates the corresponding
mass of fuel to be injected into the cylinder involved, with account also taken of gas oil temperature.
Delivery correction based on water temperature
When cold, the engine encounters greater operating resistance, mechanical friction is high, oil is till very viscous and operating plays
are not optimized yet.
Fuel injected also tends to condense on cold metal surfaces.
Fuel dosing with a cold engine is therefore greater than when hot.
Delivery correction to prevent noise, fumes or overloads
Behaviors that could lead to the defects under review are well known, so the designer has added specific instructions to the center
to prevent them.
De-rating
In the event of engine overheating, decreasing delivery proportionally to the temperature reached by the coolant changes injection.
44
SECTION 3 - INDUSTRIAL APPLICATION