Patent ID: 6837218

Claim:
A radial piston pump for generating high fuel pressure in fuel injection systems of internal combustion engines, in particular in a common rail injection system, having a driveshaft, supported in a housing, that has an eccentrically embodied shaft portion which cooperates with preferably a plurality of pistons capable of reciprocating radially, relative to the driveshaft, in a respective element bore, in order to aspirate fuel and subject it to high pressure in a high-pressure region, wherein the outer jacket face ( 3 ) of the pistons and/or the inner jacket face ( 20 ) of the element bore having a structure in the μm range formed therein and wherein the structure is formed by lubrication channels ( 9 - 18 ), disposed in pairs, each of a different length, each channel having arms oriented perpendicular to one another, with one arm disposed in the axial direction and the other arm in the circumferential direction of the respective jacket face.