Feedback control of SCR system by cross-sensitivity of NOx sensor to NH3

被引：0
作者：
Wang, Tian-Tian [1 ,2 ]
Yan, Fu-Wu [1 ,2 ]
Hu, Jie [1 ,2 ]
Hou, Jie [1 ,2 ]
Long, Hao [1 ,2 ]
机构：
[1] Hubei Key Laboratory of Advanced Technology of Automotive Components, Wuhan University of Technology, Wuhan
[2] Hubei Collaborative Innovation Center for Automotive Components Technology, Wuhan University of Technology, Wuhan
来源：
Neiranji Xuebao/Transactions of CSICE (Chinese Society for Internal Combustion Engines) | 2015年 / 33卷 / 02期
关键词：
Ammonia; Crosssensitivity; Diesel engine; Feedback control; Nitrogen oxide sensor; Selective catalytic reduction;
D O I：
10.16236/j.cnki.nrjxb.201502026
中图分类号：
学科分类号：
摘要：
The measuring principle and characteristics of nitrogen oxide(NOx)sensor are introduced and a feedback controller(FBC)based on the cross-sensitivity of NOx sensor to ammonia(NH3)was developed. Four feed forward control strategies are compared first, then the sensor output signal is changed by using mathematical manipulation because FBC needs a linear signal, which makes the NOx sensor more effective at NH3 measurement. A feedback control model was established and its control parameters were quantified on the basis of experimental and Nyquist stability criterion. Response test results show that FBC can compensate disturbance and adjust operation within 120, s. Emission tests showed that the closed loop control method is feasible under most of the test conditions, NOx conversion efficiency of selective catalytic reduction(SCR)system is 82.4% and 80.3% in ESC and ETC test while the leakage of NH3 is under 10×10-6 on average. ©, 2015, Chinese Society for Internal Combustion Engines. All right reserved.
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页码：178 / 185
页数：7
相关论文
共 8 条
[1]  
Johnson T.V., Review of diesel emissions and control, (2010)
[2]  
Frank W., Robert C., Van Den Eijnden E., Et al., Is closed-loop SCR control required to meet future emission targets?, (2007)
[3]  
Andrew H., Wu M.C., David C., Et al., Model based control of SCR dosing and OBD strategies with feedback from NH<sub>3</sub> sensors, (2009)
[4]  
Blakeman P., Arnby K., Marsh P., Et al., Optimization of an SCR catalyst system to meet EU-IV heavy duty diesel legislation, (2008)
[5]  
Sasaki H., Scholl D., Parsons M., Et al., Development of an Al2O3/ZrO2- composite high-accuracy NO<sub>x</sub> sensor, (2010)
[6]  
Arnaud F., Stephane R., Yann C., Et al., About crosssensitivities of NO<sub>x</sub> sensors in SCR operation, (2013)
[7]  
Schar C.M., Control of a Selective Catalytic Reduction Process, (2003)
[8]  
Schar C.M., Onder C.H., Geering H.P., Control of an SCR catalyst converter system for a mobile heavy-duty application, IEEE Transactions on Control System Technology, 14, 4, pp. 641-652, (2006)
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