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Regulated and Unregulated Emissions from Catalyst Vehicles at Low Ambient Temperatures
ISSN: 0148-7191, e-ISSN: 2688-3627
Published March 01, 1993 by SAE International in United States
Annotation ability available
Cold operating environment has many kinds of negative effects on the use of automobiles. Low ambient temperature degrades start-up performance and increases fuel consumption. Hence, the amounts of exhaust emissions are also elevated. In particular, high concentrations of CO and HC are present in the exhaust. Cold-start derates especially the performance of a TWC type of emission reduction. Therefore, an increasing emphasis has been set to the testing of exhaust emissions even at sub-ambient temperatures, For this reason, US-EPA has recently revised US emission regulations by comprising an additional low ambient temperature (20°F = -7°C) test for CO emissions.
Apart from the regulated components, other poisonous compounds have been detected from the exhausts, although usually in very small quantities, A cold-start may have an increasingly strong effect even to the emission of these substances. Therefore, as many as possible of these compounds should be included into the low temeperature emissions analysis. Current methods for detecting these components are primarily based on ‘wet chemistry’. Therefore, they are very laborous and allow no real-time analysis of transient phenomena. However, recent R&D efforts have made fast FTIR-technology available also to the engine exhaust analysis applications. The paper lists some preliminary results for this type of work.
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CitationLaurikko, J. and Nylund, N., "Regulated and Unregulated Emissions from Catalyst Vehicles at Low Ambient Temperatures," SAE Technical Paper 930946, 1993, https://doi.org/10.4271/930946.
SAE 1993 Transactions: Journal of Fuels & Lubricants
Number: V102-4; Published: 1994-09-01
Number: V102-4; Published: 1994-09-01
- Miles, D.L. et.al. The Effect of Ambient Temperature on Exhaust Emissions of Cars with Experimental Emission Controls SAE Paper 741052
- Oustrouchov, N. Polak, J. Automobile Emissions and Fuel Economy at Low Ambient Temperatures Report EPS 4-AP-78- 1 Canada Air Pollution Control Directive Canada 1978 45
- Branham, RJ. Evaluation of the Temperature Effects on Five 1981 Passenger Vehicles Technical report EPA-AA-TEB-82-4 Environmental protection Agency USA 1981 16
- Coutts, H.J. Automotive Cold-Start Carbon Monoxide Emissions and Preheater Evaluation Special report 81-32 U.S.Army Corps of Engineers, Cold Regions Research and Engineering Laboratory New Hampshire, USA 1981 34
- Braddock, J.N. Impact of Low Ambient Temperature on 3-way Catalyst Car Emissions SAE Paper 810280
- Landman, L.O. Analysis of Carbon Monoxide Emissions as a Function of Ambient Temperature and Vehicle Parameters Technical report EPA-AA-CTAB/-TA-83-6 Environmental Protection Agency USA 1983 17
- Larson. R.E. Vehicle emission characteristics under cold ambient conditions SAE Paper 890021
- Nylund, N.-O. Laurikko, J.K. Juva, A.P. Engine Lubrication And Fuel Economy At Low Ambient Temperatures SAE Paper 885020
- Laurikko, J.K. Automotive exhaust emissions at low ambient temperature SAE Paper 890003
- Laurikko, J.K. On-the Road Durability and Performance of TWC Exhaust Emission Control Under Real Nordic Driving Conditions SAE Paper 910172
- Laurikko, J.K. Optimizing Three-Way Catalyst Emission Control System For Low Ambient Temperature Operations SAE Paper 920012
- Heller, B. et al. Performance of a New System for Emission Sampling and Measurement SESAM SAE Paper 900275
- Prigent, M.F. de Soethe, G. Nitrous Oxide N 2 O in Engine Exhaust Gases - A First Appraisal of Catalyst Impact SAE Paper 890292