On a diesel engine, an ignition system is not required, because due to the high compression ratio, the air is heated to such an extent that, after fuel injection, it spontaneously ignites.
BMW petrol engines are equipped with a parametric ignition system, which is controlled by the Mortonic control unit. The Motronic control unit also provides electronic fuel injection control.
Models The ignition system consists of:
- ignition coils,
- spark plugs,
- high-voltage ignition distributor with a slider,
- position sensors,
- DME control unit (DME = Digital Engine Management = Motronic).