Nozzle assembly for use in injection valve, has nozzle needle comprising recess that is hydraulically coupled with high pressure cycle of fluid, where blind hole-shaped section of recess extends axially over portion of guide section

摘要

The assembly has a nozzle needle (34) arranged in a recess of a nozzle body in such a manner that the needle prevents/allows fluid flow in a closed/open position, respectively. A gap is formed between a guide section (40) of the needle and the nozzle body. The needle has a recess (52), which is hydraulic coupled with a high pressure cycle of the fluid. A blind hole-shaped section (54) of the recess (52) extends axially over a portion of the guide section, where the axial extending of the recess ends before front side of the needle turned away from the needle. An independent claim is also included for an injection valve with an injector body and a nozzle assembly.