199002568 - INTRODUCTION - DIESEL PRESSURE PUMP AND CONTROL
SPECIFICATIONS (For the 75 CV version)
Type
The CP1 pressure pump (1) is the radialjet type with three radial pistons (total capacity 0.567 cc) and is controlled by the camshaft by means of an oldham joint (2); there are no timing positions.
Structure
Each pumping unit consists of:- a piston operated by a cam in one piece with the pump shaft;- a plate-type intake valve;- a ball delivery valve.Because the pressure pump must be fed at a pressure of at least 0.7 bar, the fuel system is equipped with an auxiliary fuel pump submerged in the tank.The maximum delivery pressure reaches 1400 bar.The pressure pump is lubricated and cooled by the fuel via special channels.SPECIFICATIONS (For the 90 CV version)
Type
The CP1 H pressure pump (1) is the radialjet type with three radial pistons (total capacity 0.697 cc) and is controlled by the camshaft by means of an oldham joint (2); there are no timing positions. There is a fuel pressure regulator (3) fitted on the pump connected to the injection control unit for modulating the flow rate. | The fuel pressure regulator is an integral part of the pressure pump and therefore no removing-refitting operations are permitted. |
Structure
Each pumping unit consists of:- a piston (1) operated by a cam (2) in one piece with the pump shaft (3);- a plate-type intake valve (4);- a ball delivery valve (5).
PRESSURE REGULATOR
Specifications
This is fitted on the rail and controlled by the injection control unit. It adjusts fuel feed pressure to the injectors.The pressure regulator consists mainly of the following components:- a spherical shutter (1);- a valve (3) controlling pin (2);- a preloading spring (4);- a coil (5).