Ignition System

The ignition system consists of a distributor containing a photoelectric crank-angle sensor, an ignition coil equipped with a power transistor, and SPFI control unit. The crank-angle signal and reference signal detected by photoelectric crank-angle sensor are sent to SPFI control unit.

The SPFI control unit determines optimum ignition timing from these signals and other engine operating parameters, and transmits an ignition signal to ignition coil ignitor. The ignitor amplifies this ignition signal and causes primary current to flow intermittently in ignition coil. Because of its accurate electric control, the system permits setting complicated spark-advance characteristics.