Modelling of Spark Ignition System

Spark ignition system is the most critical component for a spark-ignition (SI) engine. The ignition timing determines the combustion phasing of the engine and consequently affects all the performance indicators of the engine. The chapter reviews the history and the state of the art of spark ignition system models for three-dimensional computational fluid dynamics. The mathematical formulations of the DPIK model, AKTIM model, and a new ignition system model are presented. The ignition system model is validated by comparing it with the available experimental data. Their applications in engine combustion modelling are discussed as examples, such as the effects of spark plug orientation. The future directions of ignition system modelling are discussed.