1 - ignition wires
2 - radio interference suppression plug
3 - screen. When suppressing radio interference
4 - distributor cover. Clean before installation
5 - a corner of the distributor cap with a spring
6 - candle tip
7 - spark plug, 20 Nm
8 - protective cap
9 - terminal 4
10 - terminal 1 (-)
11 - terminal 15 (+)
12 - ignition coil
13 - key cascade of the TSZ system. Installation position: Interior under upholstery, front left in footwell.
14 - radiator plate
Transistor system (TSZ) is a non-contact ignition system. Instead of a breaker contact, the ignition distributor is equipped with a maintenance-free Hall sensor (TSZ-H). An ignition capacitor is not required. The non-contact Hall sensor consists of a sensor, a magnet, and rotor screen plates mounted on the distributor shaft.
The Hall sensor controls the operation of the TSZ relay and thereby determines the moment of switching on and off the current flow through the ignition coil. Thus, the Hall sensor determines the ignition timing.
When the rotor rotates together with the camshaft, the plates -1- run through the air gap -4- of the magnetic system -2- without touching them. As the plate moves in the gap of the magnetic system, it induces a magnetic field on the built-in semiconductor sensor -3- (Hall-IC). As a result, the Hall voltage -UG- drops to almost zero and the primary current of the ignition coil begins to flow through the TSZ unit. When the plate leaves the gap, the primary current is interrupted and ignition occurs.
The number of plates on the rotor always corresponds to the number of engine cylinders. The width of the plate -b- corresponds to the angle of rotation at which the output key passes current. This angle of rotation does not change during the entire operation of the Hall sensor and its adjustment is not required.
To protect the key stage and the ignition coil from overheating, it is provided to turn off the voltage supply to the ignition coil when the ignition is on and the engine is not running.
For safety reasons, the ignition coil has a 5.5mm hole with a plug.
It serves to ensure that in the event of a short circuit in the ignition system, the filling mastic of the ignition coil has an exit, preventing an explosion.
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