Iveco VECTOR Series Technical And Repair Manual page 48

20
SECTION 2 - FUEL VECTOR 8 ENGINES
Pressure regulator and 5 bar pressure relief valve in regulation mode
Figure 17
81387
1. Coil — 2. Core — 3. Pre—loading spring — 4. Shutter — 5. High—pressure pump supply — 6. Fuel inlet (from the filter) — 7. Fuel
return from the high—pressure pump — 8. Cylinder for opening outlet line — 9. Fuel outlet — 10. Fuel delivery
When the PWM is in regulation mode the coil (1) is energised (between 0—1600mA depending on the pressure required by
the ECM) and the core (2) is moving the shutter (4) towards the closing position in order to limit the fuel flow to the HPP and
thereby reducing the fuel pressure in the rail.
The cylinder (8) in the pressure relief valve will move into a balance position and there it will maintain the pressure in the low
pressure line at 5 bar.
Base - April 2006 Print P2D32V001E