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Control of a Urea SCR Catalytic Converter System for a Mobile Heavy Duty Diesel Engine
Technical Paper
2003-01-0776
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
An advanced controller for a urea SCR (Selective Catalytic Reduction) catalytic converter system for a mobile heavy-duty diesel engine is presented. The after-treatment system is composed of the injecting device for urea solution and a single SCR catalytic converter. The control strategy consists of three parts: A primary feedforward controller, a surface coverage observer, and a feedback controller. A nitrogen oxide (NOx) gas sensor with non-negligible cross-sensitivity to ammonia (NH3) is used for a good feedback control performance. The control strategy is validated with ESC and ETC cycles: While the average NH3 slip is kept below 10 ppm, the emission of NOx is reduced by 82%.
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Authors
- C. M. Schär - Measurement and Control Laboratory, Swiss Federal Institute of Technology (ETH), Zurich, Switzerland
- C. H. Onder - Measurement and Control Laboratory, Swiss Federal Institute of Technology (ETH), Zurich, Switzerland
- H. P. Geering - Measurement and Control Laboratory, Swiss Federal Institute of Technology (ETH), Zurich, Switzerland
- M. Elsener - Paul Scherrer Institute, Villigen, Switzerland
Topic
Citation
Schär, C., Onder, C., Geering, H., and Elsener, M., "Control of a Urea SCR Catalytic Converter System for a Mobile Heavy Duty Diesel Engine," SAE Technical Paper 2003-01-0776, 2003, https://doi.org/10.4271/2003-01-0776.Also In
Diesel Emission Measurement, Modeling, & Control from the SAE 2003 World Congress on CD-ROM
Number: SP-1754CD; Published: 2003-03-03
Number: SP-1754CD; Published: 2003-03-03
References
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