6.3 Fuel System
In the following picture a typical Fuel System of the E4P engine is shown.
Fig. 6.1: Fuel System
In the fuel feeding line two feeding pumps are provided which deliver fuel at low pressure to the high
pressure pump. Between feeding pumps and high pressure pump a fuel filter is installed which is able
to cope with the contaminants expected to occur during 100 hours of operation. Direct at the high
pressure pump inlet the fuel temperature and pressure is measured. In case of a pressure loss the
EECU, which actuates both feeding pumps switches automatically to the inactive pump.
The high pressure pump supplies fuel at maximum 1600 bar to the fuel rail and further to the injectors.
At the high pressure pump a fuel metering unit is installed which ensures that only the required quantity
of fuel is compressed. The necessary rail pressure, which is measured directly at the rail, is controlled
by the rail pressure valve.
Excessive fuel of about 4,5 l/min quantity is used to cool and lubricate the high pressure pump. This
excessive fuel is warmed up and flows back through the return line into the fuel tank.
For approved fuel grades refer to chapter 2.5.6.4
To Next Page
Loading...
Need help?
General
