Functions of TSZ-H,TSZ-I systems (Opel Kadett D)

The transistor ignition system with a Hall sensor is a contactless ignition system. Instead of breaker contacts, an ignition distributor with a maintenance-free Hall sensor is used. No ignition capacitor is required. The Hall sensor consists of a contactless magnetic sensor and a screen mounted on the distributor shaft. The Hall sensor controls the TSZ-H switch and determines the moment of switching on/off the current in the ignition coil. Thus, the Hall sensor also determines the ignition moment.

If the screen enters the air gap of the magnetic sensor, a magnetic field is created around the semiconductor element. The Hall sensor turns on the current in the ignition coil. If the screen leaves the air gap of the magnetic sensor, the current in the ignition coil is turned off and ignition occurs.

The TSZ-H ignition switch supplies voltage to the ignition coil only for the period of time required to charge the primary winding. As a result, power losses in the ignition coil and the switch are minimized.

To protect the switch and ignition coil from severe overheating, the control device, if the ignition is on and the engine is not running, turns off the power supply to the ignition coil after about 1 second.

For safety reasons, the ignition coil contains a 5.5 mm diameter hole closed with a plug. It is designed to specifically remove the ignition coil filling compound in the event of overheating due to a short circuit.

Functions of the TS7-I ignition system for 1.2-/1.3-l engines (since August 1982) correspond mainly to the functions of the TS2-H system. In these systems, an inductive sensor is used instead of a Hall sensor.

In addition, by reducing the size of the electronic components, the switch can be placed in the ignition distributor.