Abstract: “In spark ignition engine (SI engine), the mixture of air and fuel is usually formed outside of the cylinder and ignited by a spark plug. Basing on the way of energy-accumulation, there are two types of ignition systems: capacitive discharge ignition system (CDI) and transistorized ignition system (TI). Although the two types of ignition system are different, they have provided the same high-voltage pulse. This paper attempts to represent a hybrid ignition system that could be used in two distinct types of ignition system with a programmable controller. According to the range of activation of the engine, the controller automatically select between CID or TI system in the optimization of consumption of fuel. Experiment results of the research shows that the hybrid ignition system could reduce the fuel consumption up to 55g per 100km. The CO and HC levels are also reduced to 0.02%.”

Keywords: Capacitive Discharge Ignition System, Transistorized Ignition System, Ignition Energy And Hybrid Ignition System