Ignition system with ignition distributor (engine 1.6-I ADP) (VW Passat B5)

This is a contactless ignition system. Instead of a breaker, the ignition distributor is equipped with a maintenance-free Hall sensor. The sensor is contactless, microelectronic, based on the Hall effect. This effect consists of the occurrence of a transverse electric field in a semiconductor plate with current when a magnetic field acts on it. The sensor consists of a permanent magnet, a semiconductor plate and a microcircuit. There is a gap between the plate and the magnet. In the gap of the sensor there is a steel screen with slits. When a slit in the screen passes through the gap, a magnetic field acts on the semiconductor plate and the potential difference is removed from it. If the screen body is in the gap, the magnetic lines of force are closed through the screen and do not act on the plate. In this case, the potential difference on the plate does not occur. Based on the Hall sensor signals, the ignition unit turns the current on or off in the primary winding of the ignition coil.

The ignition control unit contains in one housing the ignition coil, the ignition coil control system and the power limiting system.

The original article is available on the website VWManual.ru