| 摘要 |
A common rail injector having an injector housing with a fuel inlet connected to a central high-pressure fuel source outside the injector housing and to a pressure chamber inside the injector housing from which pressure chamber depending on the pressure in a control chamber fuel is injected when a nozzle needle lifts away from its seat and in which the pressure in the control chamber is controlled in a direct, inverse fashion by an actuator in particular a piezoelectric actuator. The combustion chamber end of the actuator or an actuator head provided on the actuator is guided in actuator guide section of a coupler sleeve, which has a larger inner diameter than a nozzle needle guide section of the coupler sleeve in which the end of the nozzle needle oriented away from the combustion chamber is guided.
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