DL06K Interim Tire-4 Diesel Engine Disassembly and Reassembly of Major Components
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4) Fuel delivery rate
Since the high-pressure pump is designed for large delivery quantities, excess
high-pressure fuel is delivered during idle and part load operation. This excess fuel
is returned to the tank via the pressure control valve.
5) Fuel metering shut off valve
If the switch of the fuel high pressure
pumping blocking valve is turned off,
the fuel quantity supplied to the
common rail is increased. If the switch
is turned off, the intake valve is opened,
and fuel pumping solenoid valve is
pulled, and the pin attached to the
electric magnet continues to open the
valve entry. Therefore, fuel taken to this pumping valve cannot be compressed
during the transfer stroke. Fuel returns to the low pressure passage, and no
pressure is built up. As the pumping blocking valve is running with small driving
power, fuel supply and blocking are perform at a short interval.
6) Common rail
The common rail stores the fuel at high pressure. At the same time, the pressure
oscillations which are generated due to the high pressure pump delivery and the
injection of fuel are damped by the rail volume. After the injector use the fuel from
the common rail for fuel injection, the pressure oscillation of the common rail is
maintained constantly by the common rail volume. The fuel pressure is calculated
by the pressure sensor of the common rail, is maintained with required value by
the pressure control valve. The fuel pressure is controlled at max. 1,800 bar in the
common rail.
EK4OM100
EG9OM146
No. 6 Injector
No. 1 Injector
No. 2 Injector
No. 3 Injector
No. 4 Injector
No. 5 Injector
pressure regulating valve
Fuel return
Fuel entry
Common rail pressure sensor
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