摘要
为满足某三缸直喷汽油机起燃工况的起燃时间与转速稳定性要求,基于最优拉丁超立方试验设计方法和克里格(Kriging)模型建立起燃目标过量空气系数、喷油相位与比例、点火提前角度、目标转速与油轨压力偏移量等控制参数与起燃时间、起燃转速的关系,并用20组样本数据验证Kriging模型的准确性。结合领域培植遗传算法(Neighborhood Cultivation Genetic Algorithm,NCGA)对起燃转速和起燃时间进行优化。结果表明:优化后的起燃时间缩短9.8%,起燃最大转速偏差和最小转速偏差分别降低45.5%和提高33.3%,转速稳定性提升,起燃转速与起燃时间满足开发要求。
In order to meet the requirements of the rotational speed stability and light-off time of a three-cylinder direct injection gasoline engine,based on the optimal Latin hypercube test design method and Kriging model,the relationship between spark efficiency,target speed,target fuel to air ratio,fuel injection phase and fuel rail pressure offset and light-off time,rotational speed were established,and 20 sets of sample data were used to verify the accuracy of Kriging model.Neighborhood Cultivation Genetic Algorithm(NCGA)was combined to optimize the light-off rotational speed and lightoff time.The result shows that the light-off time reduce nearly 9.8%,the maximum and minimum light-off rotational speed deviations reduce 45.5% and increase by 33.3%respectively,the stability of light-off rotational speed increase,and the light-off speed and ignition time meet the development requirements.
作者
张顺
王冬
汪侃
陈孔武
王大伟
周浩
ZHANG Shun;WANG Dong;WANG Kan;CHEN Kong-wu;WANG Da-wei;ZHOU Hao(Dong Feng Motor Corporation Technical Center,Wuhan 430000,China)
出处
《武汉理工大学学报》
CAS
北大核心
2019年第12期104-112,共9页
Journal of Wuhan University of Technology
