Common Rail System: Injectors
The injectors are installed in the engine's cylinder head, and have the same function as nozzles and nozzle holders on the previous injection systems. The main injector components are:
Hole-type nozzle, hydraulic servo-system, solenoid valve
Injector functions
The forces required to open and close the nozzle needle cannot be generated by the solenoid valve on its own. The nozzle needle is therefore indirectly triggered via a hydraulic force-amplification system.