Plunger component for high pressure fuel pump of fuel injection system, has roller supported in recess of supporting element, where roller and/or supporting element has groove such that contact area between roller and element is reduced

摘要

The component has a hollow-cylindrical plunger body, and a supporting element accommodated in the body. A roller (3) is rotatably supported in a recess of the supporting element. The roller in an area of an outer circumferential surface (5) and/or the supporting element in an area of the recess has a groove (6) extending over the circumference such that a contact area between the roller and the supporting element is reduced during an unloaded condition of the component. The groove is arranged with respect to an axial extension of the circumferential surface and/or the recess.