A diesel engine does not have an ignition system, since due to the high compression ratio, the air in the cylinders is heated to such a temperature during compression that the fuel injected into the cylinders ignites spontaneously.
Ignition systems have different designs:
ESC (Electronic Spark Control) - ignition system based on characteristic fields. EEC (Electronic Engine Control) - electronic engine management system with built-in ignition system based on characteristic fields.
The 9/94 and V6 DOHC engines are equipped with a distributorless ignition system. The function of distributing high voltage to the spark plugs of individual cylinders is performed by stationary electronically controlled parts, which replace the conventional mechanical distributor with a rotating rotor.
In other engines, the job of the ignition distributor is to distribute high voltage in the prescribed sequence to the spark plugs and transmit information about the crankshaft speed and ignition timing to the ignition control unit via the Hall sensor.
The electronic ignition system does not wear out and does not require adjustment as part of maintenance. Thanks to the presence of electronic components, the ignition system is very reliable and practically does not require repair.
Caution: When working with the electronic ignition system, it is necessary to observe safety precautions, see p. 47.