Keywords SI Engine;Spark Plug Ion Current;Virtual Instrument;Soft Sensing Technology;Plasma;Characteristic of Ion Current;Quasi-Homogenous Mixture Combustion;Optimizing AFR;

• 点燃式发动机;火花塞离子电流;虚拟仪器;软测量技术等离子体;离子电流特性;准均质稀薄燃烧;优化空燃比;