The magnetic part of the ignition distributor sensor, called the generator control pulse sensor, consists of the Hall magnetic sensor itself and a toothed armature mounted on the rotor.
The magnetic flux in the ignition coil varies depending on the passage of the teeth of the armature rotating in the interpole gap of the magnetic sensor. When the armature tooth enters the interpole gap, there is no magnetic field in the integrated circuit of the Hall sensor, there is no induced current. When the armature tooth leaves the interpole gap, in accordance with the law of induction, an alternating voltage appears in the Hall sensor circuit, the circuit closes and a control pulse is generated.
The width of the armature teeth corresponds to the angle of the cam.
The switch controls the ignition depending on the speed of the ignition distributor shaft, the voltage of the battery, the impedance of the ignition coil, and in all engine operating modes it generates voltage pulses of a constant value.
Interruption of the current in the primary winding of the ignition coil by the switch causes a sharp change in the magnetic flux in the coil and the appearance of a high voltage current in the secondary winding of the ignition coil.
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