A control method for consistent performance of automotive selective catalytic reduction systems under variant aging conditions

Yao Ma, Junmin Wang

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

3 Scopus citations

Abstract

This paper presents a novel control method for realizing consistent emission reduction performance of automotive selective catalytic reduction (SCR) systems under variant aging conditions. SCR systems have been widely recognized as one of the leading aftertreatment systems for reducing Diesel powertrain tailpipe NOx emissions in ground vehicle applications. While fresh SCRs are quite effective in reducing tailpipe NOx emissions, their NOx reduction capabilities and performances may substantially degrade with in-service aging. To ensure the emission control performance of a SCR system during the entire vehicle service life, it is thus critical for the SCR control system to be robust and adaptive against the SCR aging effects and strive to achieve the best possible and consistent tailpipe emission reductions even under the conditions that the SCR has been severely aged. A novel control method that combines a SCR ammonia coverage ratio reference generator and tracking controller with explicit consideration of SCR aging effects is analytically developed and verified in simulations. The simulation results under the US06 test cycle demonstrate high effectiveness of the proposed controller in achieving consistent tailpipe emission reductions against the system degradation derived from the catalyst aging.

Original languageEnglish
Title of host publication2016 American Control Conference, ACC 2016
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages4187-4192
Number of pages6
ISBN (Electronic)9781467386821
DOIs
StatePublished - Jul 28 2016
Event2016 American Control Conference, ACC 2016 - Boston, United States
Duration: Jul 6 2016Jul 8 2016

Publication series

NameProceedings of the American Control Conference
Volume2016-July
ISSN (Print)0743-1619

Conference

Conference2016 American Control Conference, ACC 2016
CountryUnited States
CityBoston
Period07/6/1607/8/16

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Keywords

  • Aging
  • Diesel engine
  • Emission control
  • SCR

Cite this

Ma, Y., & Wang, J. (2016). A control method for consistent performance of automotive selective catalytic reduction systems under variant aging conditions. In 2016 American Control Conference, ACC 2016 (pp. 4187-4192). [7525580] (Proceedings of the American Control Conference; Vol. 2016-July). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ACC.2016.7525580