Microcomputer Based Smart Engine Ignition Control System for Motorcycles

In order to increase the engine power, economy and improve the pollution emissions, a new smart ignition system is proposed. Through a programmable and controllable ignition angle technique to improve the ignition efficiency for the DC capacitive discharge ignition (CDI) system. The 8-bit single chip microcomputer is implemented to read the crankshaft speed signal and camshaft baseline signal. The ignition angle of the engine can be controlled by the preloaded engine power characteristic curve and the intelligent determination made by the microcomputer. From the full scale vehicle testing results of the prototype system, the proposed ignition system exhibits much better performance than present traditional ones in engine power curve, friendliness of human-machine interface and ease of use.