Special injectors with hydraulic servo-system and electrical triggering (solenoid valve) are used with common rail system in order to archieve efficient start of injection and precise injected fuel quantity.

The nozzle has opened by the electrical pulse, the energizing current is reduced to a lower holding value.

The Injection is terminated when the solenoid valve is no longer triggered and closes as result.

The switching on the ECM, the current profile of the injector with booster, clear, and recharge phases is the following step. Capacitor in ECM is function to charge for activating the injectors Capacitor discharge → Pull up current → Charge (7A) → Hold in current (12±1A) → Charge (, Hold in control current).

If the signal is below threshold value, the ECM judged this as a fault and DTC is set.