不同海拔下重型共轨柴油机喷油参数虚拟标定  

Virtual Calibration of Injection Parameters for a Heavy-Duty Common Rail Diesel Engine at Different Altitudes

作　　者：焦宇飞 刘瑞林 周广猛 张众杰 杨春浩[3] 董素荣 Jiao Yufei;Liu Ruilin;Zhou Guangmeng;Zhang Zhongjie;Yang Chunhao;Dong Surong(Institute of Equipment Technology,Academy of People’s Armed Police,Beijing 100012,China;Military Vehicle Engineering Department,Army Military Transportation University,Tianjin 300161,China;College of Power Engineering,Naval University of Engineering,Wuhan 430033,China)

机构地区：[1]中国人民武装警察部队研究院装备技术研究所,北京100012 [2]陆军军事交通学院军用车辆工程系,天津300161 [3]海军工程大学动力工程学院,湖北武汉430033

出　　处：《内燃机学报》2020年第6期522-529,共8页Transactions of Csice

基　　金：国防科技重点实验室基金资助项目(6142212180204).

摘　　要：高原环境下柴油机燃烧恶化导致性能显著下降,喷油参数优化标定是改善柴油机高原性能的关键.为改善柴油机喷油参数的标定效率,有效提升柴油机高原动力、经济性,建立了柴油机虚拟仿真平台.基于拉丁超立方抽样(LHS)将试验标定工况点由20580个缩减至210个,提出二次多项式函数和神经网络相结合的方法,建立了柴油机输入与输出二阶响应曲面模型,得到了重型共轨柴油机不同海拔喷油参数修正Map,并依据修正Map进行了重型共轨柴油机高海拔模拟台架试验.结果表明:经过虚拟标定可实现柴油机在海拔为2 km以内动力性能保持不降,海拔为3 km时重型柴油机标定功率下降6.8%,海拔为5 km时柴油机标定功率下降30.9%.随着海拔升高,涡前排气温度、增压器转速和最高燃烧压力均未超过限值,证明了该虚拟标定方法的可行性.Under high altitude conditions,diesel engine performances are obviously worsened due to combustion deterioration.Injection parameters calibration plays a key role in improving the engine performances at plateau.In order to improve the calibration efficiency and effectively recover the engine power and the fuel economy,a vertical calibration simulation model was established,in which Latin hypercube sampling(LHS)was used to reduce the experiment points from 20580 to 210.A second-order response surface model that combines the quadratic polynomial function and neural network was used to revise injection parameter maps.An engine bench experiment was conducted according to the revised maps.The results show that,after the virtual calibration,the power output of the engine does not drop at the altitude of 2 km,but drops by 6.8%and 30.9%at the altitude of 3 km and 5 km respectively.The exhaust temperature before turbine,the turbocharger speed and the maximum combustion pressure do not exceed their limits at these altitude operations.This indicates that the virtual calibration built is successful.

关 键 词：重型共轨柴油机 海拔 喷油参数 拉丁超立方抽样 神经网络 虚拟标定 

分 类 号：TK427[动力工程及工程热物理—动力机械及工程]