Patent ID: 6817841
Filing Date: 2004-11-16
Classification: F02M,F04B

Abstract:
A radial piston pump for high-pressure fuel supply n common rail fuel injection systems of internal combustion engines, comprising,a plurality of pump elements (19), disposed radially to a drive shaft (53), each of the pump elements (19) having a pumping chamber (63) that is defined on one end by a piston (59), one intake-side inlet conduit (46) per pump element (19), wherein the inlet conduits (46) are supplied with fuel via an annular conduit (45), defined by the drive shaft (53) and a housing (61), and discharge into the pumping chambers (63) of the pump elements (19), the drive shaft (53) being adapted to directly control the hydraulic communication between the annular conduit (45) and the inlet conduits (46), wherein the inlet conduits (46) are defined by passages formed in the housing (61), wherein during the intake stroke of a pump element (19), this element communicates hydraulically with the annular conduit (45), and wherein, regardless of the position of the drive shaft (53), only one inlet conduit (19) communicates hydraulically with the annular conduit (45).