Patent ID: 6102006
Filing Date: 2000-08-15
Classification: F02M

Abstract:
A fuel injection assembly, in each case for one cylinder of a diesel engine, consisting of a housing (1), of a controllable piston pump (5) and of an injection nozzle (4) adjoining the latter and having a nozzle chamber (25), the housing (1) possessing a fuel supply chamber (23) fed from outside and a return orifice (24) leading outward, the piston pump (5) possessing a pump piston bush (6) which is mounted longitudinally displaceably and is guided on a coaxial pin (20) fixed relative to the housing and which has at least one control orifice (17), and the pin (20) containing a first longitudinal bore (39) leading from the interior (18) of the pump piston bush (6) to the injection nozzle (4), whereina) the pump piston bush (6) is sealingly surrounded by a sealing sleeve (50) which, with the outer wall of the pump piston bush (6), forms a closed sealing space (53), into which the control orifice (17) opens at the top and a first transverse bore (54) of the pump piston bush (6) opens at the bottom,b) the pin (20) possesses a second longitudinal bore (57) which is flow-connected, on the one hand, to the fuel supply chamber (23) and, on the other hand, via the first transverse bore (54), to the sealing space (53),c) the sealing space (53) is flow-connected to the return orifice via a second transverse bore (58) and a third longitudinal bore (59) in the pin (20).