一种农用柴油机NO_x排放预测模型算法  

A Prediction Model Algorithm of NO_x Emission from Agricultural Diesel Engine

作　　者：李金广[1] 雷军[1] 胡友耀[1] 李渊 LI Jinguang;LEI Jun;HU Youyao;LI Yuan(State Key Laboratory of Power System of Tractor,Luoyang Tractor Research Institute Co.,ltd.,Luoyang 471039,China)

机构地区：[1]拖拉机动力系统国家重点实验室洛阳拖拉机研究所有限公司

出　　处：《拖拉机与农用运输车》2020年第1期36-38,43,共4页Tractor & Farm Transporter

摘　　要：针对现有的农用柴油机后处理选择性催化还原(Selective Catalytic Reduction,SCR)控制系统,提出一种改进的农用柴油机氮氧化物(NO x)排放的预测算法,即四阶龙格库塔迭代算法。此算法作为NO x排放预测模型建立的基础,通过自适应改变步长以应对不同空速,迭代计算相应的排放浓度值,在单片机的时间片内,实现对整个SCR后处理催化器的计算预测。To improve the SCR control system of agricultural diesel engine,a prediction algorithm of nitrogen oxide(NO x)emission from agricultural diesel engine is presented in this paper,which is called fourth-order Ronge-Kutta algorithm.As the foundation of NO x emission prediction model,this algorithm changes the step size to calculate the concentration of the exhaust gas under different air speeds,by which the calculation and prediction of the whole SCR after-treatment catalytic converter are realized within the time segment of single chip computer.

关 键 词：农用柴油机 NOx 排放控制模型 四阶龙格库塔算法 

分 类 号：TK421.5[动力工程及工程热物理—动力机械及工程]