Spare parts for Delphi DFP3 common rail pumps

This high pressure pump uses the cam and radial piston concept already proven on the DPC and EPIC rotating pumps, however the transmission shaft and cam ring make up the one and same assembly. This is driven by chain or belt, rotating in the fixed hydraulic head. This design eliminates dynamic sealing problems since the high pressure is generated in the fixed part of the pump. For engines needing substantial flow rates, the pump is fitted with two chambers angularly offset by 45 degrees. This offset reduces torque peaks and rail pressure variations. The four lobe cam is identical to that in conventional rotating pumps. However since the pump no longer determines injection procedure, it is possible to lengthen the pumping phase in order to significantly reduce driving torque, vibration and noise.

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