基于AMESim/Simulink的SCR系统控制策略研究  

Study on Control Strategy for SCR System Based on AMESim-Simulink

作　　者：李顶根[1] 丁伟[1] 成晓北[1] 

机构地区：[1]华中科技大学能源与动力工程学院,武汉430074

出　　处：《内燃机工程》2016年第3期42-47,54,共7页Chinese Internal Combustion Engine Engineering

基　　金：国家自然科学基金项目(51176056)

摘　　要：针对重型柴油机尿素选择性催化还原(SCR)系统,在AMESim软件中搭建了SCR催化器模型,分别在欧洲稳态测试循环(ESC)和欧洲瞬态测试循环(ETC)下进行了验证。结果表明证明除个别工况外,模型误差均在10%以内,符合控制精度要求。在Simulink里建立了闭环控制模型,通过建立的AMESim和Simulink联合仿真平台,在ESC和ETC测试循环下验证了控制模型的控制效果。计算和试验结果表明,此闭环控制策略能够使NO_x消除率达75%且NH_3的平均泄漏体积分数小于10×10^(-6)。A selective catalytic reduction （SCR）model in the AMESim software was proposed for the urea SCR after-treatment device of a heavy-duty diesel engine, which was verified on the ESC and ETC test cycle. The results show that, except for individual conditions, the model could meet the requirements of emission control with an accuracy of 10%. A closed-loop control model was established in Simulink. Through the co-simulation platform established by the AMESim and Simulink, the effect of control model was verified on the ESC and ETC test cycle. The computational and trail results show that an NOx removal of 75% could be achieved at a mean NH3 slip value below 10×10^-6 by the use of the closed-loop control strategy.

关 键 词：内燃机 选择性催化还原 重型柴油机 AMESIM 模型误差 闭环控制 

分 类 号：TK421.5[动力工程及工程热物理—动力机械及工程]