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 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 has the ability to rotate depending on the vacuum applied to the vacuum regulator.
The switch converts the pulses from the proximity sensor into current pulses in the primary winding of the ignition coil. The switch consists of a surge protection stage, an excitation stage (pre-gain) and the final stage, made on a Darlington diode, which acts as a chopper.
The commutator is connected to the pulse generator (proximity sensor) three conductors.
To prevent overloading the ignition system, the final stage of the switch is turned off approximately 1 s after the ignition is turned off, if the starter does not turn on during this time. The circuit is restored when the starter is turned on.
An ignition coil adapted to this ignition system is installed next to the switch. The ignition coil has a hole in the upper part, closed with a plug with a diameter of 5.5 mm to protect the coil from excessive internal pressure. The plug is pushed out of the hole when the pressure rises due to a rise in temperature due to a short circuit in the final stage of the switch or a fault in the shutdown circuit when the engine is not running.
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