Cycle-based optimal emission control of diesel engine selective catalyst reduction systems

Hui Zhang, Yan Chen, Junmin Wang, Yue Yun Wang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this work, we investigate the cycle-based optimal emission control for Diesel engine selective catalyst reduction (SCR) systems. Considering the main chemical reactions inside a SCR cell, a three-state nonlinear model is obtained and the system parameters are determined by using the experimental data. Though there are considerable works on the SCR dosage control in the literature, the optimal control strategy applied to the SCR systems has been rarely studied. The global optimality in the SCR dosage control can be used as a benchmark and evaluate the performance of other designed controllers. Moreover, it can be employed to find the limit of NOx conversion efficiency of a specific SCR aftertreatment system. Therefore, it is quite meaningful to study the optimal emission control of SCR systems via the dynamic programming approach. Due to the system stiffness and the huge computational load, we propose the dynamic programming algorithm based on the continuous-time SCR model. The proposed algorithm is applied to the SCR system and the verification is carried out based on the US06 test cycle. The prescribed ammonia slip constraint is satisfied and the tailpipe NOx emission is optimized.

Original languageEnglish (US)
Title of host publicationProceeding of the 11th World Congress on Intelligent Control and Automation, WCICA 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1980-1984
Number of pages5
EditionMarch
ISBN (Electronic)9781479958252
DOIs
StatePublished - Mar 2 2015
Event2014 11th World Congress on Intelligent Control and Automation, WCICA 2014 - Shenyang, China
Duration: Jun 29 2014Jul 4 2014

Publication series

NameProceedings of the World Congress on Intelligent Control and Automation (WCICA)
NumberMarch
Volume2015-March

Other

Other2014 11th World Congress on Intelligent Control and Automation, WCICA 2014
CountryChina
CityShenyang
Period6/29/147/4/14

Keywords

  • Ammonia coverage ratio optimization
  • Dynamic programming
  • Selective catalytic reduction (SCR)

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Software
  • Computer Science Applications

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    Zhang, H., Chen, Y., Wang, J., & Wang, Y. Y. (2015). Cycle-based optimal emission control of diesel engine selective catalyst reduction systems. In Proceeding of the 11th World Congress on Intelligent Control and Automation, WCICA 2014 (March ed., pp. 1980-1984). [7053025] (Proceedings of the World Congress on Intelligent Control and Automation (WCICA); Vol. 2015-March, No. March). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/WCICA.2014.7053025