Transient emission simulation and optimization of turbocharged diesel engine

doi:10.1007/s11708-013-0251-0

Front Energ

2013, Vol. 7

Issue (2) : 237-244 https://doi.org/10.1007/s11708-013-0251-0

RESEARCH ARTICLE

Transient emission simulation and optimization of turbocharged diesel engine

Lingge SUI¹, Zhongchang LIU³(

), Yongqiang HAN³, Jing TIAN³

1. State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130025, China; Computer Department, Changchun Finance College, Changchun 130028, China; 2. State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130025, China

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Abstract

In order to alleviate the pressure of experimental research of turbocharged diesel engine under transient operations, a whole process simulation platform for turbocharged diesel engine under transient operations was established based on the multi-software coupling technologies of Matlab/Simulink, GT-Power, STAR-CD and artificial neural network. Aimed at the contradiction of NO_x and soot emission control with exhaust gas recirculation (EGR) of turbocharged diesel engine under transient operations, on this simulation platform, a transient EGR valve control strategy was proposed, which adjusted the EGR valve in adjacent level based on the feedback of its opening according soot control limit under transient operations. Simulation and experimental results prove that the transient emission optimization effect of this control strategy is obvious. On the one hand, compared with the previous control strategy, which closed the EGR valve during the whole transient operations, soot emission is slightly increased by 9.5%, but it is still 9% lower than the control limit. On the other hand, compared with the previous control strategy, NO_x transient emission is reduced by 44%.

Keywords diesel engine transient simulation emission control strategy exhaust gas recirculation (EGR)

Corresponding Author(s): LIU Zhongchang,Email:liuzc@jlu.edu.cn

Issue Date: 05 June 2013

Cite this article:

Lingge SUI,Zhongchang LIU,Yongqiang HAN, et al. Transient emission simulation and optimization of turbocharged diesel engine[J]. Front Energ, 2013, 7(2): 237-244.

URL:

https://academic.hep.com.cn/fie/EN/10.1007/s11708-013-0251-0
https://academic.hep.com.cn/fie/EN/Y2013/V7/I2/237

Tab.1 Specifications of 6DL2-35E3 engine

Fig.1 Transient measurement and control system of experiment engine

Fig.2 Comparison between simulation and experiment under CSIT operation

Fig.3 Comparison of pressure in-cylinder experiment and simulation

Fig.4 Comparison of heat release rate experiment and simulation

Fig.5 Comparison of simulation and experiment of NOunder EGR rate 7% and various transient time operations

Fig.6 Comparison of simulation and experiment of soot under EGR rate 7% and various transient time operations

Fig.7 Idea of EGR control strategy of dual optimization of NO and soot.(a) Effect of soot optimization; (b) Effect of NO optimization

Fig.8 Transient EGR valve control strategy module in Simulink

Fig.9 Comparison of simulation and experimental results of soot with control strategy.(a) Soot comparison under 2 s transient operation; (b) soot comparison under 9.5 s transient operation

Fig.10 Comparison of simulation and experimental results of NO with control strategy.(a) NO comparison under 2 s transient operation; (b) NO comparison under 9.5 s transient operation

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