摘要
点燃式天然气发动机的空气流量计算精度决定了发动机空燃比控制精度,常用的速度密度法计算空气流量时,计算偏差较大,瞬态时发动机响应滞后。采用节气门流量模型是改善发动机瞬态控制的有效方法,试验表明,采用节气门流量模型后,发动机加速响应性能大大提高。
The air - fuel ratio control effect of a spark - ignition （SI） natural gas engine de- pends on the air flow calculation accuracy. When airflow is calculated with the speed - density method, the deviation is large and the engine retards to response in the transient state. The throttle flow model is an effective method to improve engine transient response. The experiment indicates that the engine acceleration response performance is greatly improved with the throttle flow model.
出处
《内燃机与动力装置》
2013年第4期1-3,7,共4页
Internal Combustion Engine & Powerplant
基金
国家863计划"大型公交车用CNG发动机产品开发"项目(2006AA11A1A9)
