Ignition System: Description and Operation

The Solid State Ignition (SSI) is made up of: distributor with pick-up coil, Micro Computer Control Unit (MCU), Knock Sensor, Electronic Ignition Control Unit (ECU), and ignition coil. The pick-up coil in the distributor sends ignition timing signals to the ECU, where they are amplified and used to trigger the ignition coil. Conventional centrifugal and vacuum advance systems combine to control the ignition advance curve. If the engine knock sensor detects any knocking, it sends a signal to the MCU that will automatically retard ignition timing as required.