Iveco Daily. Manual — part 402
136
ELECTRIC/ELECTRONIC SYSTEM
D
AILY
Base - May 2004
The hydraulic system consists of a low and high-pressure circuit, the former consisting of the following piping:
- connecting high-pressure output to the Rail;
- Common Rail;
- connecting the Rail and supplying electro injectors.
The low-pressure circuit consists of the following piping:
- fuel aspiration from tank to prefilter;
- supplying the pump and prefilter;
- supplying the high-pressure pump via the fuel filter.
The Rail exhaust circuit and the electro injectors complete the supply circuit.
The following are mandatory for safety reasons because of high-pressure levels inside this hydraulic system:
- avoid improper connection of high pressure piping junctions;
- avoid connecting high pressure piping with the engine running (useless and hazardous attempts at purging must be avoided!)
Low-pressure circuit integrity is essential to proper system operation, so mishandling and modifications must be avoided, with
immediate action required in case of leaks.
1. High pressure pump
-
2. High pressure line
-
3. Electro injector recriculation line
-
4. Electro injectors
-
5. Common
rail
-
6. Over pressure valve
-
7. Bypass valve
-
8. Filter
-
9. Priming pump
-
10. Tank
-
11. Mechanical supply pump
-
12. High pressure pump limiter valve
-
13. Pressure regulator
Figure 136
0003340t
ELECTRIC/ELECTRONIC SYSTEM
137
D
AILY
SYSTEM COMPONENTS
Camshaft pulley and timing sensor
5 teeth (4 + 1 for timing detection) are machined on the
pulley opposite an inductive sensor equal to the one on the
flywheel.
5 holes (4 + 1 timing recognition hole) are provided on the
F1A engine pulley.
The sensor is of the inductive type and is used by the
electronic control unit to detect the engine stroke during
synchronisation (when starting).
When assembling the sensor:
ensure the dimension illustrated working on the slots of the
bracket and measuring with a thickness gauge
- make sure that the sensor is perpendicular in relation to
the wheel tightening the nuts.
TECHNICAL VIEWS OF PULLEY AND SENSOR
1. Camshaft pulley - 2. Sensor
1
2
Motor 8040
Motor F1A
TIMING RECOGNITION HOLES
1. Camshaft pulley - 2. Sensor
0003320t
0003321t
Figure 137
Figure 138
138
ELECTRIC/ELECTRONIC SYSTEM
D
AILY
Base - May 2004
The flywheel has a set of 58 holes (60 - 2), as illustrated, for
generating the signal for the inductive sensor.
It is the same as the one on the camshaft and is positioned on
the crankcase and detects the passage of the 58 holes on the
flywheel.
The change in the signal caused by the lack of 2 holes
(synchronism gap) which takes place at each rotation of the
crankshaft is the reference signal that allows the control unit
to recognise the advance in relation to the TDC of piston pair
1-4.
This signal is also used by the control unit to detect the engine
rotation speed, the duration of injection and to control the
rev counter.
When assembling the sensor:
- ensure the dimension illustrated working on the slots of
the bracket and measuring with a thickness gauge.
- make sure that the sensor is perpendicular in relation to
the wheel tightening the nuts.
The F1A engine crankshaft sensor features a slatted sound
wheel on the crankshaft front.
This features 58 (60-2) teeth and the sensor detects their
passage.
HOLES FOR GENERATING SIGNALS ON THE
FLYWHEEL
TECHNICAL VIEW OF FLYWHEEL AND SENSOR
1. Flywheel - 2. Sensor
RPM SENSOR ON CRANKCASE
1
2
TECHNICAL VIEW OF THE SOUND WHEEL AND
SENSOR
1. Sound wheel ć 2. Crankshaft sensor
Figure 139
Figure 140
Figure 141
Figure 142
0003319t
ELECTRIC/ELECTRONIC SYSTEM
139
D
AILY
Flywheel and camshaft sensor specifications
These are inductive sensors.
The flywheel sensor (48035) is connected at pins 29 and 37
of connector A of the control unit.
It is also used to control the electronic rev counter on the
instrument cluster.
The timing sensor (48042) is connected at pins 4 and 31 of
connector A of the control unit.
The resistance at 20 °C is approx. ~ 860 Ohm.
SENSOR AND CONNECTION CABLE
SENSOR CONNECTOR AND WIRING DIRAGRAM
Figure 143
Figure 144
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