Device
The electronic ignition system includes an ignition distributor with a built-in proximity sensor (pulse generator), switch and high energy ignition coil.
Like the distributor gel of the contact ignition system, the sensor-distributor of the electronic ignition system has centrifugal and vacuum ignition timing controls. The non-contact sensor assembly with the base plate and toothed armature has the ability to rotate depending on the vacuum supplied to the vacuum regulator.
The switch is attached to the mudguard of the right front fender on an aluminum base that provides cooling.
The switch converts the pulses from the proximity sensor into control signals. The commutator consists of a cascade for generating the output signals of a proximity sensor (done as a trigger), ignition timing control stage, gain output stage. performed according to the Darlington scheme and with a time delay.
An ignition coil adapted to this ignition system is installed next to the switch. The coil is covered with a plastic protective casing.
Ignition Distributor Sensor Details:
1 - housing of the sensor-distributor; 2 - distributor sensor cover; 3 - noise suppression screen; 4 - rotor; 5 - dust screen; 6 - toothed anchor; 7 - generator control pulse sensor; 8 - connector; 9 - vacuum regulator; 10 - flange of the sensor-distributor housing; 11 - gasket
Principle of operation
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, and there is no induced current. When the armature tooth comes out of the pole gap. in accordance with the law of induction, an alternating voltage appears in the Hall sensor circuit. the circuit is completed and a spark 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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