Ignition System - Hall Effect: Description
NOTE:
Ignition system on Audi Coupe GT, 4000CS Quattro, 5000S controlled by the CIS-E electronic control system. See BOSCH CIS-E ELECTRONIC CONTROL SYSTEM in FUEL SYSTEMS section.
The typical Bosch Hall Effect electronic ignition system consists of an ignition coil, Hall Effect sending unit (in distributor), Hall control unit, distributor, spark plug wires and spark plugs.
The Hall Effect sending unit receives voltage directly from the electronic control unit. Signals from the sending unit are sent to the Hall control unit through an electronic ignition control unit.
During engine operation, ignition timing is controlled by the electronic ignition control unit after receiving signals from the knock sensor, idle switch, full throttle switch and engine vacuum.