Technical Paper
Study of Discharge under Swirl Flow and Combustion Conditions
2018-10-30
2018-32-0006
Combustion at a high EGR (Exhaust Gas Recirculation) ratio is an effective means for improving the fuel efficiency of a gasoline engine. However, there is a problem that the combustion speed decreases. So, it is necessary to intensify the in-cylinder flow to ensure the combustion speed. The spark discharge generated by the ignition coil is strongly influenced by the in-cylinder flow. It forms an arcuate discharge path along the flow, and may blow off and re-discharge under a strong gas flow. The behavior of spark discharge strongly affects the ignition, and consequently affects the stability of combustion. However, the phenomena in a combustion chamber are very complicated because of various environmental conditions, and the discharge and combustion phenomena under a strong gas flow remain unclear. In this research, in order to study these phenomena, discharge and combustion experiments under flow using a constant volume container were performed.