Ignition Timing & Anti-Knock Function

Each cylinder has its own ignition coil (direct ignition system), eliminating the need for a distributor. The Motronic control unit activates each coil separately.

If the camshaft sensor has not sent output signals since starting the engine, ignition system enters double ignition mode. This mode activates all spark plugs for each crankshaft revolution. Switching from normal to double ignition, or vice versa, takes place immediately, independent of fuel injection operation.

Ignition timing is retarded (anti-knock function), depending on inputs from knock sensors, in order to prevent pre-ignition of the air/fuel mixture in the combustion chamber.