Pump i.e. high-pressure fuel pump, for fuel injector of internal combustion engine, has roller comprising central portion and edge areas in direction of axis of shaft, where portion and areas are longitudinally formed away from track

摘要

The pump has a cam (16) comprising a cam track (56) rectilinearly formed in a longitudinal section parallel to a rotational axis (15) of a drive shaft (14). A circular cylinder-shaped roller (50) comprises a circular cylinder-shaped central portion and lateral edge areas in a direction of the axis of the drive shaft, where the circular cylinder-shaped central portion and the lateral edge areas are convex-curved and longitudinally formed away from the cam track. A pump piston (20) is driven by the cam of the shaft indirectly in a stroke movement in a radial direction to the axis.