In older ignition systems, the output stage was mounted as a separate component in the engine compartment on the vehicle body or – in the case of rotating high voltage distribution – in or on the ignition distributor. The introduction of static high-voltage distribution and the development of microelectronics made it possible to integrate the output stage into the ignition coil.
This results in numerous advantages:
● Diagnostic possibilities
● Ion current signal
● Interference suppression
● Power cut-off
● Current limitation
● Thermal cut-off
● Short circuit recognition
● High voltage stabilization