3308490 - 1060E diesel pressure pump

PRESSURE PUMP

It is the "radial jet" type with three radial pistons (total capacity 0.657 cc) and is driven by the timing belt.

Each pumping unit consists of:

  • a piston (5) operated by a cam (2) fixed to the pump (6) shaft
  • an inlet valve (3)
  • a supply ball valve (4).
The pressure pump should receive a supply pressure of at least 0.5 bar; the fuel system is therefore fitted with an auxiliary electric pump immersed in the tank.The maximum supply pressure reaches 1350 bar.The pressure pump is lubricated and cooled by the same diesel fuel by means of suitable ducts.
1, Cylinder 2, Cam 3, Inlet valve 4, Supply ball valve 5, Piston 6, Pump shaft 7, Inlet - low pressure (from the diesel filter) 8, Supply - high pressure (rail) 9, Supply - low pressure (recirculation)

PRESSURE REGULATOR

It is fitted on the pressure pump and is operated by the injection control unit and regulates the fuel supply pressure to the injectors.

The pressure regulator basically consists of:

  • a spherical shutter (1)
  • a valve (3) control pin (2)
  • a pre-loading spring (4)
  • a coil (5).
1, Spherical shutter 2, Pin 3, Valve 4, Pre-loading spring 5, Coil 6, Casing 7, Keeper