In gasoline engines with electronic ignition, the control unit uses the stored ignition characteristics fields to determine the correct ignition timing. The synchronization of the ignition system is carried out by the engine control unit based on the signals generated by the Hall sensor or pulse generator. The anti-knock combustion system allows for economical operation of the engine at a high compression ratio and adapts to fuels of different qualities. The knock sensor on the cylinder block detects knocking noises in the engine and, through appropriate pulses, induces the engine control unit to change the ignition angle to a later one. This prevents knocking in the engine, thus avoiding damage to the engine. The ignition system has no wear parts and requires no maintenance. Only spark plugs should be replaced as part of engine maintenance.
Direct ignition
The distribution of the high voltage to the individual spark plugs is carried out by electronic components. AUA / AUB petrol engines with a displacement of 1.4 liters have two ignition coils, which are attached to the cylinder head in one housing with the power output stage. Each ignition coil supplies voltage to two spark plugs. Other engines have 3 or 4 ignition coils respectively, which are mounted directly on the spark plugs - no high voltage wires are required in this case.
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