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

42

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

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