DV11
Operation and Maintenance
118
Common Rail Fuel-injection System
Printed in Mar. 2005 PS-MMA0608-E1A
z The required high-speed solenoid switching is achieved by using high voltages
and currents. This means that the solenoid valve triggering stage in the ECU must
be designed accordingly. The start of injection is controlled by the angle-time
control system of the EDC(Electronic Diesel Control).This uses a sensor on the
crankshaft to register engine speed, and a sensor on the camshaft for phase
detection(working cycle).
3.4.5. Fuel system
z The common rail fuel injection system comprises a low pressure stage for the low
pressure delivery of fuel, a high pressure stage for the high pressure delivery, and
the ECU.
3.4.6. Fuel tank
z The fuel tank must be of non-corroding material, and must remain free from leaks
at double the operating pressure, and in any case at 0.3 bar.
3.4.7. Fuel delivery pump
z The fuel delivery pump is installed on back side of the fuel high pressure pump, is
a gear type fuel pump. The pump draws the fuel from the fuel tank and continually
delivers the required quantity of fuel in the direction of the high pressure pump.
Fuel delivery pump
1. Fuel inlet
2. Driving gear
3. Fuel outlet
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