Fuel Pump; Fuel Filter - Alfa Romeo 159 Training Material

ENGINE

Fuel pump

1. Electrical motor
2. Pump impeller
3. Terminal cover
Function: To take fuel from the tank and send it to the high pressure pump at a pressure of 3.5 bars to ensure
correct operation of the high pressure pump.
Location: Inside the fuel tank.
Features: The fuel pump is integral with the level gauge in the tank and the fuel filter. These components cannot be
replaced individually.
Operation: The pump consists of a permanent magnet electrical motor which directly controls the pump impeller.
This is a centrifuge (not positive displacement) pump. The impeller transfers a certain kinetic energy to the diesel
which in the stator is transformed into pressure.
Advantages: The use of a centrifuge pump (instead of a positive displacement pump) offers the following
advantages:
high performance also at low electrical motor power and low fluid temperatures
light weight
smaller size.

Fuel filter

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