Injector, in particular common - rail - injector, as well as the fuel injection system with an injector

摘要

The present invention relates to an injector (10; 50), in particular common - rail - injector, for an internal combustion engine, with a sealing section (30; 52) and valve needle (20; 51), which in a nozzle body (11; 54) is arranged on - and down, and the nozzle body (11; 54) at least one, preferably a plurality of spray holes (19; 19a) which, in a closed position of the valve needle (11; 54) with respect to a pressure chamber (23; 23a) in the nozzle body (11; 54) and sealed in an open position of the valve needle (20; 51) with the pressure chamber (23; 23a) is connected, with the sealing segment (30; 52) in the closed position of the valve needle (20; 51) at least in the region of the at least one nozzle opening (19; 19a) a flat engagement on the nozzle body (11; 54) is formed and the region of the at least one nozzle opening (19; 19a) seals in this way, and wherein a connection between the pressure chamber (23; 23a) and a in the nozzle body (11; 54) at the bottom of the nozzle body (11; 54) of a blind hole (16; 16a) is designed. According to the invention, it is provided that the connection in the form of at least one groove (31; 56) is formed, which on the outer surface of at least the sealing section (30) of the valve needle (20) or on the wall of the nozzle body (54) is arranged.