Abstract:

A method to realize multi-point ignition was introduced to solve problems of low combustion speed
and low energy utilization rate in traditional spark plug ignition system. A primary design of a transverse
magnetic resonant mode (TM010) was used for calculation and optimization based on theoretical analysis and
stimulation to determine the size of resonant cavity and to determine the electromagnetic field distribution in the
cavity. A high speed camera and some pressure sensors were used for visualization analysis and combustion
pressure characteristic analysis. The results show that this method shortens the time by 15% when the pressure
arrived at the maximum, and increases the maximum pressure by 5% at the experiment pressure of 200 kPa
compared to the conventional spark plug ignition. Therefore, this method can realize the multi-point ignition.

Key words: internal combustion engine, multipoint ignition, microwave resonance, transverse magnetic mode (TM010), electric field distortion, spark plug