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Diesel Engine SCR Systems: Modeling, Measurements, and Control

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Urea-SCR Technology for deNOx After Treatment of Diesel Exhausts

Part of the book series: Fundamental and Applied Catalysis ((FACA))

Abstract

Diesel engine urea-SCR system control has been a great challenge ever since the start of SCR mobile vehicle applications. Open-loop urea dosing is difficult to meet the tailpipe NOx and ammonia emission requirements primarily due to the complex SCR dynamics in engine transient operations. Closed-loop SCR urea dosing control is thus more preferable in order to achieve high SCR operational NOx conversion efficiency and low tailpipe ammonia slip. However, the highly nonlinear dynamics, limited measurements, and transient operating conditions make the closed-loop control of on-vehicle SCR systems challenging. Many studies on SCR system control-oriented modeling, measurement systems, and controller designs have been proposed in recent years. While several major SCR control related issues have been addressed to some extents, many vehicle SCR real-time control challenges remain open. The objective of this chapter is to summarize the vehicle SCR system control challenges and review the possible solutions in the aspects of control-oriented modeling, measurements, and control for mobile vehicle applications. The main intent is to provide an introduction to the current vehicle SCR control system developments.

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Author information

Authors and Affiliations

  1. Cummins Inc., Columbus, IN, 47201, USA

    Ming-Feng Hsieh

  2. Department of Mechanical and Aerospace Engineering, The Ohio State University, Columbus, OH, 43210, USA

    Junmin Wang

Authors
  1. Ming-Feng Hsieh
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  2. Junmin Wang
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Corresponding author

Correspondence to Junmin Wang .

Editor information

Editors and Affiliations

  1. Politecnico di Milano, Milano, Italy

    Isabella Nova

  2. Politecnico di Milano, Milano, Italy

    Enrico Tronconi

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Hsieh, MF., Wang, J. (2014). Diesel Engine SCR Systems: Modeling, Measurements, and Control. In: Nova, I., Tronconi, E. (eds) Urea-SCR Technology for deNOx After Treatment of Diesel Exhausts. Fundamental and Applied Catalysis. Springer, New York, NY. https://doi.org/10.1007/978-1-4899-8071-7_14

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