NOx Performance of an LNT+SCR System Designed to Meet EPA 2010 Emissions: Results of Engine Dynamometer Emission Tests

The paper covers the NOx performance evaluation of an LNT + SCR system designed to meet the 2010 on-highway heavy-duty (HD) US EPA emission standards. The system combines a fuel reformer catalyst (REF), lean NOx trap (LNT), diesel particulate filter (DPF), and selective catalytic reduction (SCR) in series, to reduce engine-out NOx and PM. System NOx reduction performance was verified in an engine dynamometer test cell, using a 2007 7.6L medium-duty engine. System NOx performance was characterized using fresh LNT and SCR along with hydrothermal aged LNT and fresh SCR. Test results show levels consistent with EPA 2010 limits under various test conditions. Catalysts performance was characterized at eight steady engine-operating conditions (A100, B50, B75, A75, B100, C100, C75, C50, across a 13-mode Supplemental Emission Test (SET), and an on-highway Heavy Duty Federal Test Procedure (HD-FTP). System level NOx conversion ranged from 84 to 99%, SCR contributing between 8 - 25% of total system NOx conversion. System fuel consumption ranged from 2.3 to 4.7%.

• Record URL:
  • https://doi.org/10.4271/2008-01-2642
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/1946391X
• Supplemental Notes:
  • Abstract reprinted with permission of SAE International.
• Authors:
  • Dykes, Erik C
• Conference:
  • Commercial Vehicle Engineering Congress & Exhibition 2004
  • Location: Chicago Illinois, United States
  • Date: 2004-10-26 to 2004-10-28
• Publication Date: 2008-10-7

Language

• English

Media Info

• Media Type: Web
• Features: Figures; References; Tables;
• Pagination: pp 327-337
• Serial:
  • SAE International Journal of Commercial Vehicles
  • Volume: 1
  • Issue Number: 1
  • Publisher: SAE International
  • ISSN: 1946-391X
  • EISSN: 1946-3928
  • Serial URL: https://www.sae.org/publications/collections/content/E-JOURNAL-02/

Subject/Index Terms

• TRT Terms: Catalytic converters; Diesel engines; Dynamometers; Emission control systems; Emissions testing; Filters; Fuel consumption; Nitrogen oxides; Particulates; Pollutants
• Subject Areas: Design; Environment; Highways; Motor Carriers; Vehicles and Equipment;

Filing Info

• Accession Number: 01643903
• Record Type: Publication
• Source Agency: SAE International
• Report/Paper Numbers: 2008-01-2642
• Files: TRIS, SAE
• Created Date: Aug 22 2017 9:22AM