Iveco Daily. Manual — part 401

ELECTRIC/ELECTRONIC SYSTEM

133

D

AILY

ELECTRONIC INJECTION SYSTEM
Common rail

General
In order to reduce the emission of particulate, particularly

high injection pressures are required.
The system on the new Daily makes it possible to inject the

fuel at pressures reaching 1350 bar, while the pressure

obtained with electronic system management optimises the

work of the engine limiting emissions and consumption.
In other diesel systems the high pressure is generated only

at the moment of injection for each single cylinder (injection

pump or injector-pump).

In the common rail a special pump continuously keeps the

fuel at high pressure, regardless of the stroke and of the

cylinder that is to receive injection, and accumulates it in a

common duct for all the injectors.
Therefore, fuel already at the injection pressure is always

present at the inlet of the injectors.
When the solenoid valve of an injector is energised by the

electronic control unit, injection takes place in the

corresponding cylinder.

FUEL FEED AND RECIRCULATION DIAGRAM

1. Heat starter plug - 2. Heat starter electro valve - 3. Electrical injector - 4. Rail hydraulic accumulator - 5. 3rd pump

cutout electro valve - 6. High-pressure pump - 7. Fuel filter - 8. Electrically driver pump - 9. Prefilter - 10. Reservoir -

11. Pressure regulator valve - 12. Connection - 13. Pressure limiter valve - 14. Flow limiter

Low pressure

High pressure

Thermostarter supply

14 13 12 11

10

9

8

7

6

5

4

3

2

1

Figure 132

134

ELECTRIC/ELECTRONIC SYSTEM

D

AILY

Base - May 2004

control and adjustment components have to be integrated.
The MS6.3 electronic control centre monitors the entire

system: it receives data from sensors and activates the

actuators as required based on input signal processing.

OPERATING LAYOUT

1. 3

rd

impeller cut-off device - 2. Flywheel rpm sensor - 3. High pressure pump - 4. Pressure regulator - 5. Other actuators

(thermal starter, heated filter, fan control, ac control) - 6. Electronic control unit with built-in atmospheric pressure sensor -

7. Other sensors (accelerator, brake, clutch, vehicle speed, water temperature, air temperature) - 8. From rail pressure

sensor - 9. Fuel tank - 10. Pre-filter - 11. Electric pump - 12. Fuel filter - 13. Filter overpressure valve - 14. Outlets unit

with calibrated hole - 15. Rail pressure limiter - 16. Air flow meter - 17. Common rail - 18. Injectors - 19. Timing sensor on

camshaft - A. To thermal starter - B. Electric circuit - C. Low pressure fuel - D. High pressure fuel

5

6

7

8

9

10

11

HYDRAULIC LAYOUT

5. Pre-filter - 6. Electric pump - 7. Filter with

overpressure valve - 8. Pressure regulator - 9. Pressure

limiter - 10. Fuel outlets unit - 11. Thermal starter

C

D

B

Figure 133

Figure 134

ELECTRIC/ELECTRONIC SYSTEM

135

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Common rail (F1A)

It differs from the Common rail system on previous engines

in that injected fuel pressure is 1600 instead of 1350 bars.

Preheat plugs are provided for cold starts.

1. High pressure pump - 2. Piping - 3. Pressure regulator - 4. Water in filter sensor - 5. Fuel filter with water separator -

6. Fule filter clogging sensor - 7. Fuel semperature sensor - 8. Fuel pressure line to filter - 9. Fuel return line to tank -

10. Fuel return line to filter - 11. High pressure piping to common rail - 12. Low pressure return line from rail - 13. Over

pressure valve - 14. Common rail - 15. Fuel pressure sensor - 16. High pressure line between rail and electro injectors -

17. Electro injectors - 18. Return line from electro injectors

Figure 135

0003343t