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Selective Catalytic Reduction On-Board Diagnostics: Past and Future Challenges
Technical Paper
2005-01-3603
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Heavy-duty diesel on-board diagnostics (OBD) regulations are being phased in around the world with varying degrees of similarity. This is occurring at a time when heavy-duty diesel emission regulations are driving complex and elaborate emission control strategies. Unique circumstances led the European heavy-duty diesel market to adopt selective catalytic reduction (SCR) as the primary solution for meeting strict Euro 4 emission levels. This paper is a review of the challenges of diagnosing an SCR system based on the Euro 4 OBD regulation and considers the future challenges of SCR diagnostics that lie ahead in the North American market.
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Nebergall, J., Hagen, E., and Owen, J., "Selective Catalytic Reduction On-Board Diagnostics: Past and Future Challenges," SAE Technical Paper 2005-01-3603, 2005, https://doi.org/10.4271/2005-01-3603.Also In
References
- Malfunction and Diagnostic System Requirements for 2004 and Subsequent Model-Year Passenger Cars, Light-Duty Trucks, and Medium-Duty Vehicles and Engines (OBD II)
- Engine Manufacturer Diagnostic System Requirements for 2007 and Subsequent Model-Year Heavy-Duty Engines http://www.arb.ca.gov/regact/emd2004/fro.pdf
- Final Statement of Reasons for Rulemaking, Including Summary of Comments and Agency Response for California Code Regulations, Section 1971
- Majewski, W. A. 2005 “SCR Systems for Mobile Engines” DieselNet http://www.dieselnet.com/tech/cat_scr_mobile.html
- Majewski, W. A. 2005 “Selective Catalytic Reduction” DieselNet http://www.dieselnet.com/tech/cat_scr.html