[1]王天田,胡杰,万川,等.国Ⅵ柴油机SCR系统尿素结晶风险评估方法初探[J].内燃机学报,2022,(06):552-560.
　Wang Tiantian,Hu Jie,Wan Chuan,et al.Evaluation Method Study on Risk of Urea Deposit in SCR System for China Ⅵ Diesel Engines[J].,2022,(06):552-560.
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国Ⅵ柴油机SCR系统尿素结晶风险评估方法初探
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《内燃机学报》[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2022年06
页码:
552-560
栏目:
出版日期:
2022-11-25

文章信息/Info

Title:
Evaluation Method Study on Risk of Urea Deposit in SCR System for China Ⅵ Diesel Engines
作者:
王天田; 胡杰; 万川; 王智
1. 华东交通大学 机电与车辆工程学院，江西 南昌 330100；2. 武汉理工大学 汽车工程学院，湖北 武汉 430070；3. 江铃汽车股份有限公司，江西 南昌 330100；4. AVL李斯特技术中心(上海)有限公司，上海 201206
Author(s):
Wang Tiantian; Hu Jie; Wan Chuan; Wang Zhi
1. School of Mechanical and Electrical Engineering and Vehicle Engineering，East China Jiaotong University，Nanchang 330100，China；2. School of Automotive Engineering，Wuhan University of Technology，Wuhan 430070，China；3. Jiangling Automobile Company Limited，Nanchang 330100，China；4. AVL List Technical Center(Shanghai) Company Limited，Shanghai 201206，China
关键词:
柴油机; 选择性催化还原; 试验; 尿素结晶; 风险评估
Keywords:
diesel engine; selective catalytic reduction; test; urea deposit; risk evaluation
分类号:
TK421.5
文献标志码:
A
摘要:
选择性催化还原(SCR)技术被广泛用于柴油机NOx排放控制，尿素结晶是这一技术的主要风险．提出一种评估SCR系统尿素结晶风险的有效方法，在对尿素结晶机理和计算流体动力学(CFD)模拟结果分析后，设计了包含24个不同温度、空速、喷射量的稳态试验和包含120个城市瞬态循环与8个交通拥堵循环的瞬态试验．通过稳态试验的尿素结晶观测结果得到每个工况点的结晶风险情况，并最终得出尿素喷射量与氨氮比(ANR)的限值Map，可为系统优化与标定提供量化目标；通过瞬态试验的尿素结晶观测结果，可评估车辆在城市道路条件和交通拥堵状态下单个DPF再生周期内的尿素结晶风险程度．
Abstract:
Selective catalytic reduction(SCR) technology is widely used in diesel engine NOx emission control. Urea deposit is the main risk of this technology and there is no effective method which is widely accepted to evaluate this risk level. A feasible method was proposed to evaluate the risk of urea deposits in the SCR system. After analyzing the mechanism of urea deposits and the computational fluid dynamic(CFD) simulation results，the steady-state tests including 24 different temperature，space velocity and injection rates，and the transient tests including 120 rounds of world harmonized transient cycle and 8 rounds of traffic jam cycle were designed for evaluating the risk of urea deposits. The risk level of each operating point and limitation maps of the urea injection and ammonia-NOx ratio(ANR) were generated through steady-state test results，which can be used for system optimization and calibration. The urea deposits observation results of the transient test can identify the urea deposits risk level of target vehicles when it is running in such traffic conditions as urban road and traffic jam within one DPF regeneration cycle.

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[1]王静,王谦,徐航,等.车用柴油机SCR系统NO_x转化效率影响因素[J].内燃机学报,2015,(05):453.
[2]陈 鬃,梅德清,赵 翔,等.碳烟催化氧化最优升温速率与颗粒质量分数的试验[J].内燃机学报,2015,(04):349.
[3]鹿盈盈,苏万华,裴毅强.喷射参数对柴油机预混燃烧和排放的影响[J].内燃机学报,2016,(01):9.
　LU Ying-ying,SU Wan-hua,PEI Yi-qiang.Effect of Injection Parameters on PCCI Combustion and Emissions in a Diesel Engine[J].,2016,(06):9.
[4]马小康,张付军,韩 恺,等.柴油、正丁醇及其混合燃料单液滴蒸发特性试验[J].内燃机学报,2016,(01):48.
　MA Xiao-kang,ZHANG Fu-jun,HAN Kai,et al.Experiment on Evaporation Characteristics of Diesel，n-Butanol and Their Blends Droplets[J].,2016,(06):48.
[5]徐 辉,蔡忆昔,施蕴曦,等.O3/N2气氛下离线再生DPF的影响因素[J].内燃机学报,2016,(01):81.
　XU Hui,CAI Yi-xi,LI Xiao-hua,et al.Influencing Factors of DPF Off-Online Regeneration Under O3/N2 Atmosphere[J].,2016,(06):81.
[6]钟汶君,何志霞,王 谦,等.不同燃油温度喷嘴内部流动可视化试验[J].内燃机学报,2015,(03):238.
[7]李长江,赵长禄,韩 恺,等.柴油机高原喷油策略遗传算法优化及罚参数研究[J].内燃机学报,2015,(03):250.
[8]马志豪,钞 莹,李 磊,等.柴油机颗粒在氧化过程中拉曼光谱参数的变化[J].内燃机学报,2015,(01):44.
　MA Zhi-hao,CHAO Ying,LI Lei,et al.Changes in Raman Spectra of Particulates Emitted from Diesel Engine During Oxidation[J].,2015,(06):44.
[9]唐 蛟,李国祥,王志坚,等.DPF碳载量模型的建立及试验[J].内燃机学报,2015,(01):51.
　TANG Jiao,LI Guo-xiang,WANG Zhi-jian,et al.Construction and Experiment of DPF Soot Loading Model[J].,2015,(06):51.
[10]刘二喜,战 强,邬斌扬,等.进气门晚关与两次喷射协同作用对柴油机 中转速中等负荷的影响[J].内燃机学报,2014,(06):481.
　LIU Er-xi,ZHAN Qiang,WU Bin-yang,et al.Effect of Late Intake Valve Closing and Split Fuel Injection on Thermal Efficiency and Emissions of a Heavy Duty Diesel Engine at Middle Loads and Middle Speeds[J].,2014,(06):481.
[11]王天田,颜伏伍,胡 杰,等.利用NOx传感器的NH3交叉敏感实现SCR 系统闭环控制[J].内燃机学报,2015,(02):178.
　WANG Tian-tian,YAN Fu-wu,HU Jie,et al.Feedback Control of SCR System by Cross-Sensitivity of NOx Sensor to NH3[J].,2015,(06):178.
[12]王 谦,张 铎,王 静,等.车用柴油机Urea-SCR 系统数值分析与参数优化[J].内燃机学报,2013,(04):343.
　WANG Qian,ZHANG Duo,WANG Jing,et al.Numerical Analysis and Parametric Optimization on Urea-SCR System of Vehicle Diesel[J].,2013,(06):343.
[13]钱 枫,吕 林,杨 栋.柴油机SCR系统排气管壁沉积物影响因素仿真[J].内燃机学报,2018,(02):144.
　Qian Feng,Lü Lin,Yang Dong.Simulation Study of Deposit Formation Inside the Exhaust Pipe on a Diesel Engine with SCR[J].,2018,(06):144.
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　Su Qingyun,,et al.Numerical Simulation of Diesel Combined Fe-Cu Zeolite SCR Catalyst[J].,2020,(06):161.
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　Yu Junbo,Mo Chunlan,Huang Wenjun,et al.Detailed Reaction Pathways of Urea Deposit in Diesel Engine with Selective Catalytic Reduction System[J].,2020,(06):169.
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　Lei Yan,Qin Chao,Qiu Tao,et al.NOx Emission Distributed Control Technology of Diesel Engine Bench Group[J].,2022,(06):338.
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更新日期/Last Update: 2022-11-25