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Catalyst Strategies for Meeting Super-Ultra-Low-Emissions-Vehicle Standards
Technical Paper
1999-01-3067
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The control of emissions from mobile sources continues to play an important part in air quality improvement. Future reductions in vehicle emissions are proposed or legislated in many countries throughout the world. The most stringent of these standards under discussion are those in the Californian LEV-II proposal, a part of which is the SULEV standard which requires a large reduction in hydrocarbon emissions, together with a significant decrease in NOx, over those legislated for ULEV. This requires the engine and aftertreatment system to deliver both a substantial reduction in the emissions of hydrocarbon during engine warm-up and increased NOx conversion during high speed operation, compared to previous ULEV systems. In this paper we outline three different catalyst systems which show the potential to provide reduction in vehicle emissions below the currently legislated ULEV and European Stage IV standards. These are an Ambient Temperature Light-off Aftertreatment System that uses an advanced low temperature catalyst, an Exhaust Gas Ignition System which generates heat by ignition of the exhaust gas in front of an underfloor catalyst, and a third system which combines an electrically heated catalyst with a hydrocarbon trap. The relative advantages of these systems will be discussed.
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Authors
- D. Morris - Johnson Matthey Catalytic Systems Division
- M. V. Twigg - Johnson Matthey Catalytic Systems Division
- N. R. Collins - Johnson Matthey Catalytic Systems Division
- R. J. Brisley - Johnson Matthey Catalytic Systems Division
- D. S. Lafyatis - Johnson Matthey Catalytic Systems Division
- T. H. Ballinger - Johnson Matthey Catalytic Systems Division
Topic
Citation
Morris, D., Twigg, M., Collins, N., Brisley, R. et al., "Catalyst Strategies for Meeting Super-Ultra-Low-Emissions-Vehicle Standards," SAE Technical Paper 1999-01-3067, 1999, https://doi.org/10.4271/1999-01-3067.Also In
References
- Ambient Temperature Light-off Aftertreatment System for Meeting ULEV Emission Standards Lafyatis D.S. Ballinger T. Lammey G. Frost J. Society of Automotive Engineers (SAE) 980421 February 1998
- Evaluation of Catalysed Hydrocarbon Traps in the EGI System: Potential for Hydrocarbon Emission Reduction Brett S. Eade D. Hurley R. Gregory D. Collins N. Morris D. Collingwood I. SAE 981417 May 1998
- Exhaust Gas Ignition A New Concept for Rapid Catalyst Light-off of Automotive Exhaust Catalyst Ma T. Collings N. Hands T. SAE 920400 February 1992
- Fast Light-off of Underbody Catalysts Using Exhaust Gas Ignition Eade D. Hurley R. Rutter B. Inman G. Bakshi R. SAE 952417 1995
- Improving the Performance of a Rapid Catalyst Light-off System Using Hydrocarbon Trapping Catalyst Formulations Hurley R. Eade D. Hands T. Campbell B. Collingwood I. Law D. Brisley R. 1996
- The Research of Zero Level Vehicle using Gasoline Engine - Challenge to Reduce Exhaust Emission to Zero Level Kishi N. Kikuchi S. Suzuki N. Hayashi T. Japanese press 16 18 September 1997