High pressure radial piston pump for injection systems of internal combustion engines comprises support rollers partly independently impinged upon by a piston and spring devices via separate support elements

摘要

High pressure radial piston pump, especially a fuel pump for injection systems of internal combustion engines, comprises pistons (125) radially guided in a pump housing (107) and impinged upon by roller tappets movably guided in the direction of the piston axis and loaded against a cam drive in the opposite direction to the pump stroke by spring devices (springs (120)). Each roller tappet has a tappet body (116) and a support roller (113) guided via the tappet body and rotatably supported against this. Each support roller is at least partly independently impinged upon by the piston and the spring devices via separate support elements (tappet bodies, plunger rods (119)). Preferred Features: The pistons are supported at least partly on the periphery against the support rollers via the support elements (tappet bodies, plunger rods).