Fuel System (Flow Of Fuel); Structure And Operation - Mitsubishi Fuso CANTER FE85DE6SLGP Shop Manual

STRUCTURE AND OPERATION

1. Fuel System (Flow of Fuel)

• The feed pump, which is driven by the camshaft inside the supply pump, draws up the fuel from inside the fuel
tank and sends it through the fuel filter, where dust and other impurities in the fuel are filtered out.
• The filtered fuel is then sent to the supply pump, where it is compressed. The compressed fuel is accumulated in
the common rail for a time, then sprayed out through the injection nozzles into the combustion chamber.
• The excess fuel from the injectors returns to the fuel tank through the fuel return hose.
• When the internal fuel pressure of the common rail exceeds the limit, the pressure limiting valve opens to allow
part of the fuel to return to the fuel tank.
• When the internal fuel pressure of the supply pump exceeds the limit, the overflow valve opens to allow part of the
fuel to return to the fuel tank.
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