Audi 100 cars use two types of ignition systems: a non-contact transistor system on cars without turbocharging and an electronic system on cars with turbocharging.
The transistor system consists of an ignition distributor, an ignition coil, an ignition control unit, spark plugs, and high and low voltage wires.
The ignition distributor pulse sensor works on the principle of the Hall effect.
The ignition system has two electrical circuits: high and low voltage.
The high-voltage circuit consists of a high-voltage winding of the ignition coil, a distributor cap with a contact carbon, a distributor runner, spark plugs and high-voltage wires, a low-voltage circuit consists of an ignition switch, the primary winding of the ignition coil and a distributor pulse unit that generates signals for the control unit. The pulse block, or Hall sensor, consists of a winding, a permanent magnet, and a signal-forming microcircuit. The control unit is located in the engine compartment and is an electronic switch that, receiving signals from the pulse unit, controls the current in the primary winding of the ignition coil.
The ignition distributor has centrifugal and vacuum regulators for adjusting the ignition timing depending on the engine speed and load.
Electronic ignition includes an ignition coil, distributor, control unit, spark plugs, sensors, high and low voltage wires.
The distributor impulse sensor also works on the principle of the Hall effect. The electronic control unit receives information from various sensors about engine load, engine speed, etc. and calculates the most effective ignition timing. In addition, the unit constantly monitors the operation of the entire system and warns the driver of serious system malfunctions if they occur using a warning lamp.
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