Injector for internal combustion engine, has injection hole axially limiting needle control area that is hydraulically connected with coupling area over coupling path, and control device controlling hydraulic pressure in rod control area

摘要

The injector (1) has an injector body (2) with an injecting hole (15), and a control rod (12) arranged coaxial to the injector body in a stroke-variable manner. The control rod immerges in a rod control area (11) and in a coupling area (13). A nozzle needle (14) is arranged in the injector body in a stroke-variable manner for controlling injection of fuel over the injection hole. The injection hole axially limits a needle control area that is hydraulically connected with the coupling area over a coupling path (17). A control device controls hydraulic pressure in the rod control area.