The transistorized ignition system is non-contact. Instead of a breaker contact, the ignition distributor has a maintenance-free inductive sensor. An ignition capacitor is also not required. The inductive sensor consists of a permanent magnet, a winding and a distributor armature connected to the ignition distributor shaft.
The inductive sensor controls the switch of the transistor ignition system, determining the moments of switching on and off the voltage supplied to the ignition coil. This determines the moment of ignition.
As the distributor armature -4- rotates on the ignition distributor shaft, there is a constant change in the distance -3- between the distributor armature and the stator poles. This causes an induction of an alternating voltage in the winding -2-. In accordance with the change in voltage amplitude, the switch together with the ignition coil generate an ignition spark. Ignition occurs precisely when the armature poles begin to move away from the poles of the stator winding. The figure also shows: 1 - permanent magnet; S is the south pole of the permanent magnet; N is the north pole of the permanent magnet.
To prevent overheating of the switch and the ignition coil, the switch turns off the power to the ignition coil when the ignition is turned off and the engine is not running.
For safety reasons, the ignition coil has a hole with a diameter of 5.5 mm with a plug. It serves to deliberately leak out the filling mass of the ignition coil in the event of a switch failure.