This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Efficient Exhaust Gas Aftertreatment Solutions for EU IV and Beyond
Technical Paper
2015-26-0103
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
The Euro IV legislation for heavy-duty on-road vehicles enforces emissions limits on the tailpipe NOx levels during both transient and modal testing, typically paired with additional limitations on, for example, ammonia emissions. There are several possible strategies for complying with the legislation, including engine management measures as well as after-treatment in the form of catalytic removal of NOx with ammonia as the reducing agent.
Based on experimental data, a range of important aspects are presented and discussed, with both overall system performance and the installation and operational costs in mind. Factors relevant for future legislations, in the form of EU V and beyond, are also discussed.
Operating the engine with high levels of Exhaust Gas Recirculation (EGR) is a possible path to EU IV compliance with no or little catalytic NOx reducing after-treatment. Here, it is contrasted against an SCR-only solution based on a non-EGR engine calibration.
Further, the possibilities of down-sizing the SCR catalyst are illustrated through the use of an ammonia slip catalyst or by improving the urea dosing control strategy. The impact of various dosing strategies is also shown using comparative tests on the same system.
Another aspect of considerable importance is thermal management and the insulation of the after-treatment system, which is illustrated with experimental data.
Finally, the importance of the studied areas for future legislations is discussed.
Recommended Content
Authors
Citation
Widd, A. and Lewander, M., "Efficient Exhaust Gas Aftertreatment Solutions for EU IV and Beyond," SAE Technical Paper 2015-26-0103, 2015, https://doi.org/10.4271/2015-26-0103.Also In
References
- Gabrielsson , P. L. T. Urea-SCR in automotive applications Topics in Catalysis 28 1-4 177 184 April 2004
- van Helden , R. , Verbeek , R. , Willems , F. , and van der Welle , R. Optimization of Urea SCR deNOx Systems for HD Diesel Engines SAE Technical Paper 2004-01-0154 2004 10.4271/2004-01-0154
- Nova , I. , Tronconi , E. Urea-SCR Technology for deNOx After Treatment of Diesel Exhausts Springer New York Heidelberg Dordrecht London 10.1007/978-1-4899-8071-7 2014
- Gabrielsson , P. , Gekas , I. , Schoubye , P. , Mikkelsen , S. et al. Combined Silencers and Urea-SCR Systems for Heavy-Duty Diesel Vehicles for OEM and Retrofit Markets SAE Technical Paper 2001-01-0517 2001 10.4271/2001-01-0517
- Rundschau Verkehrs Umweltranking Green Truck 2014 www.verkehrsrundschau.de/umweltranking 2014
- Regulation (EC) No 715/2007 of the European Parliament and of the Council Official Journal of the European Union, L 171 1 16 2007 http://eurlex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2007:171:0001:0016:EN:PDF
- Proposal for an amendment to Regulation No. 49 ECE/TRANS/WP.29/GRPE/2012/4 November 2011
- Schär , C. M. , Onder , C. H. , Geering , H. P. Control of an SCR Catalytic Converter System for a Mobile Heavy-Duty Application IEEE Transactions on Control Systems Technology 14 4 641 653 July 2006
- LDS 6 In-situ Laser Gas Analyzer - Operating Instructions 01/2009 Siemens AG 2009
- DX4000 FTIR Gas Analyzer Technical Data Sheet Gasmet Technologies www.gasmet.fi
- Griffiths , P. and De Haseth , J. Fourier Transform Infrared Spectrometry 2 nd Wiley-Interscience 2007
- Wang , D. , Yao , S. , Shost , M. , Yoo , J. et al. Ammonia Sensor for Closed-Loop SCR Control SAE Int. J. Passeng. Cars - Electron. Electr. Syst. 1 1 323 333 2009 10.4271/2008-01-0919