Brief component description: Injector
The injector is on the side of the cylinder. During fully sequential fuel injection, each injector is activated by the DME control unit via its own output stage. During this process, the injection period of the specific cylinder is adjusted to suit the operating condition (engine speed, load and engine temperature).
The fuel quantity injected depends on the rail pressure, counter pressure in the combustion chamber and the opening period of the valve.
| Index | Explanation |
|---|---|
| 1 | Injection system |
| 2 | Two-pin plug connection |
The incoming vehicle voltage is stepped up to between 85 and 100 volts by using a pulse output stage with high-power capacitors. A current flows in the output stage up to a certain switch-off value. The switch-off produces an induction voltage, e.g. 85 volts, that charges the high-power capacitors (boosters). A current level of between 2.8 and 16 amperes is supplied via this capacitor current to the injectors. The DME activates the injectors on the ground side.
Voltage is supplied to the DME via the load-shedding relay terminal 15. This voltage is applied at the 4 injectors.
Also observe the diagnosis wiring diagram!