General information about the ignition system (Audi A6 C5)

The ignition system produces a spark that ignites the fuel-air mixture injected into the combustion chamber. To do this, the ignition coil converts the 12 V battery voltage into a voltage of up to 30,000 V.

The ignition system in cars with a gasoline engine is an integral part of the engine management system.

The spark that ignites the fuel-air mixture is generated by the spark plugs on command from the electronic engine control unit, which calculates the required ignition advance angle. The control unit uses the embedded parametric data, as well as signals from various sensors. The ignition system is synchronized based on signals from the Hall sensor or pulse sensor on the camshaft or crankshaft.

Distribution of ignition current to spark plugs is performed by electronic components, replacing the usual mechanical ignition distributor with a runner. Each spark plug has its own ignition coil, which is located on the corresponding cylinder. On cars with AJK, ARE, AZA engines, the output stages of the ignition coils are installed separately on the air filter housing.

The electronic ignition system operates without wear and requires no maintenance. It is only necessary to replace the spark plugs regularly as part of maintenance.