Radialjet Pump Specifications; Low Pressure Regulator Solenoid Valve - Alfa Romeo 159 Training Material

ENGINE

Radialjet pump specifications

Type
Number of pumps
Total displacement
Volumetric efficiency
Maximum working pressure
Drawn power
Top speed
Fuel feed
Lubrication
Cooling

Low pressure regulator solenoid valve

FEATURES: The pressure regulator is used to control the amount of fuel let into the pump.
OPERATION: Flow into the pump is maximum when the solenoid is de-energised, i.e. the regulator is fully open and
is a simply passage for the fuel conveyed from the submerged electrical pump at a pressure of 3.5 bars and flow rate
of 160 l/h.
The ECU powers the regulator in PWM to limit the flow rate and let in only the amount of fuel to be compressed and
sent to the rail. The graph clearly shows that the flow rate decreases when the control current increases.
The safety function is no longer present. This function is preformed by the regulator on the rail.
Traccia Didattica Alfa 159-en-ridotta
ALFA 159 TRAINING MATERIAL
Radialjet radial pumps
3
0,697 cm
0.794 cm
>76% at 1600 bars 1000 pump rpm 40°C fuel
1600 bars
1.6k W at 1600 bars, 3450 rpm (4 cylinders)
3.2 kW at 1600 bars, 2800 rpm (5 cylinders)
See following page
Fuel pressure 3.5 bars, minimum flow rate equal to 160
litres/hour
By fuel
By fuel
0
147/318
3
/rev. (4 cylinders)
3
/rev. (5 cylinders)
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Fiat Auto S.p.A.
After Sales Training
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