| 摘要 |
A common rail injector, having a nozzle body that is secured with the aid of a lock nut to a retaining body having a fuel inlet, which communicates with a central high-pressure fuel reservoir outside the injector and with a pressure chamber inside the injector. From the pressure chamber, as a function of the position of a control valve, fuel subjected to high pressure is injected. The control valve assures that a nozzle needle, which can reciprocate in a longitudinal bore of the injector axially counter to the prestressing force of a nozzle spring that is received in a nozzle spring chamber, lifts from a seat when the pressure in the pressure chamber is greater than the pressure in a control chamber that communicates with the fuel inlet via an inlet throttle. To make higher nozzle needle speeds possible, the control chamber is integrated with the nozzle body. In addition, a control peg, which is guided in the control chamber, is embodied on the end of the nozzle needle remote from the combustion chamber, and the nozzle spring chamber is disposed outside the control chamber.
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