Figure 264
This rotary positive displacement pump with integrated
by-pass is mounted on the suction pipe, on the left-hand side
of the chassis frame.
The fuel pump is the roller-type with positive displacement, a
brush motor with energizing by permanent magnets.
The impeller turns, driven by the motor, creating volumes that
shift from the inlet port to the delivery port.
These volumes are defined by the rollers that stick to the outer
ring when the motor turns.
50707
CROSS-SECTION OF FUEL PUMP
773010
Fuel pump
The pump has two valves, a check valve to prevent the fuel
circuit from emptying (with the pump stationary) and an
overpressure valve that recirculates the delivery with the inlet
when pressures over 5 bar are produced.
Specifications
Delivery pressure:
2.5 bar
Flow rate:
> 155 litres/h
Power supply:
13.5 V - < 5 A
Coil resistance at 20
°C:
28.5 Ohms
596
F1C ENGINE
D
AILY
Base - May 2004