Research of the SI engine with multispark capacitor discharge ignition system

Abstract

Modern ignition systems for spark ignition (SI) engine management systems require an extended (adaptive) spark with regulated spark discharge duration for reliable ignition of fuel mixture and elimination of misfired-cycles. Lean air-fuel mixtures and alternative fuels also require an improved ignition system. In order to meet the increased requirements for ignition systems there is a multispark capacitor discharge ignition (CDI) system developed with prolonged spark duration. Block diagram of CDI system is presented; the principle of the operation of the system elements is explained. Mathematical model of the processes of the CDI system are developed. Calculations of the CDI system, test data with four-stroke SI engine GA14DS (Nissan Sunny) and conclusions are presented.