| 摘要 |
The fuel injector 4 comprises a multi-piece injection valve member 6 having a first needle section 7 and a second needle section 8, via each of which a number of injection apertures 15, 16 on the combustion chamber-side end of the fuel injector 4 can be opened or closed. The fuel injector 4 is actuated by a control valve 32, actuated by an actuator 60. The two needle sections 7, 8 are actuated via control valve 32 which is common to the needle sections 7, 8 in such a manner that a first actuation period 71 of the control valve 32 for opening the first needle section 7 is interrupted for a period of time 80 which permits the first needle section 7 to partly close, which period of time 80 permits force opening the second needle section 8 to build up and is followed by a second actuation period 73 of the control valve 32 so as to open the needle sections 7, 8.
|
