Abstract
We aimed at the development of the powerful ignition system (active ignition) that achieves highly effective combustion. In order to achieve the stabilization of the initial combustion, we had been studying the generation of active species mass, volumetric ignition and a long pulse duration discharge. In this study, we developed the ignition system without a large-scale structural change from a conventional engine. The active ignition system consists of a primary coil (ignition coil) of standard spark discharge, and a secondary coil of high frequency supply. Plasma is generable by emphasizing sparks with high frequency voltage. By applying a high frequency voltage, the spark discharge can increase the speed and the number of collisions. Plasma and free radicals are produced by this phenomenon. In order to compare the effect of ignition, the constant volume combustion chamber that can give a flow was used and took a high-speed video using Schlieren photography. In this study, we report that the improvement of combustion in the engine by using a new ignition system applied HF electric field.
