Common rail injector

In a common rail injector for injecting fuel in a common rail injection system of an internal combustion engine, having a nozzle body (1), which is secured with the aid of a lock nut (5) on a retaining body (6) that has a fuel inlet (9) in communication with a central high-pressure fuel reservoir outside the injector and with a pressure chamber inside the injector, from which pressure chamber fuel subjected to high pressure is injected as a function of the position of a control valve (16, 18) which assures that a nozzle needle (7), which can reciprocate in a longitudinal bore of the injector axially counter to the prestressing force of a nozzle spring (11) that is received in a nozzle spring chamber (10), lifts from a seat when the pressure in the pressure chamber is greater than the pressure in a control chamber (15) that communicates with the fuel inlet (9) via an inlet throttle (20), the improvement wherein the control chamber (15) is integrated with the nozzle body (1);

• that on the end of the nozzle needle (7) remote from the combustion chamber, a control peg (14) is embodied which is guided in the control chamber (15), and that the nozzle spring chamber (10) is disposed outside the control chamber (15).