Fuel injector e.g. pump-nozzle-injector, for internal combustion engine e.g. diesel engine, has main and control valve units accommodated on top of each other by individual actuator unit in their respective closing positions

摘要

The injector has a control valve (200) fluidically isolated in a switching position of a supply area (Z) of fluid (300) by a main valve unit (210) in a closing position of a high pressure area (H) of the injector. The valve is fluidically isolated in another switching position of the high pressure area by a control valve unit (220) in a closing position of a dischargeable control chamber (110) of injector, whose fluid pressure acts in a nozzle needle in a closing direction. The units are accommodated on top of each other by an individual actuator unit in their respective closing positions. An independent claim is also included for a method of controlling an injector e.g. pump-nozzle-injector.