Mono-Motronic ignition system for 74 kW engine. Even with this simplest version of the engine, the ignition timing control, i.e. the adaptation of the ignition timing to the corresponding operating situation, is carried out exclusively electronically.
The KE-Motronic ignition system in engines with a power of 85 kW, produced up to 6/92, was responsible not only for injection, but also for ignition.
The Digifant ignition system is installed on 85 kW engines from 7/92. The principle of operation is the same as that of the Mono-Motronic system: everything is in one control unit, the ignition timing is controlled electronically.
Fully electronic ignition system (VEZ) mounted on a 5-cylinder engine with a power of 98 kW. Although this ignition system is equipped with its own control unit, the ignition and injection systems are in constant communication with each other. The ignition timing is controlled electronically.
MPI or MPFI ignition systems of 6-cylinder engines are also an integral part of the engine's electrical system. Feature: these systems carry out ignition without distributor. Accordingly, for every two opposite cylinders, there is one ignition coil, which produces a spark only if one of the cylinders needs it. For technical reasons (economy of parts) each cylinder receives another one at each engine revolution (unnecessary, but not harmful) spark on release.
Hint: as already mentioned, different ignition systems have a lot in common. The ignition systems of 4- and 5-cylinder engines are almost identical. For example, these systems have almost the same high-voltage element in which a spark is created. Serious differences exist only with the ignition systems of 6-cylinder engines.
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