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Correlation Study of PM and NOx for Heavy-Duty Vehicles Across Multiple Drive Schedules
Technical Paper
2004-01-3022
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
When heavy-duty truck emissions are expressed in distance-specific units (such as g/mile), the values may depend strongly on the nature of the test cycle or schedule. Prior studies have compared emissions gained using different schedules and have proposed techniques for translating emissions factor rates between schedules. This paper reviews emissions data from the 5-mode CARB HHDDT Schedule, UDDS Schedule, and a steady-state cycle (AC5080), with reference to each other. NOX and PM emissions are the two components of emissions which are reviewed. A heavy-duty chassis dynamometer was used for emissions characterization along with a full scale dilution tunnel. The vehicle test weights were simulated at 30,000 lbs, 56,000 lbs, and 66,000 lbs. For each vehicle, average data from one mode or cycle have been compared with average data for a different mode or cycle. When the Cruise Mode and Transient Mode of the HHDDT Schedule were compared, it was evident that injection timing strategies affected the average Cruise Mode emissions of NOX. As a result, there was substantial data scatter when mode-averaged Cruise emissions were plotted against mode-averaged transient emissions. Moreover, the relationship between Cruise and Transient NOX was not the same for the various test weights. Correlations for PM varied widely in goodness of fit to the data. This is because the PM may increase substantially due to elemental carbon “puff” which occurs when the turbocharger has not reached full boost pressure at the onset of an increase in engine load. The AC5080, which is a short test originally developed for inspection and maintenance applications, showed reasonable correlation with the UDDS Schedule, although a best fit line still caused the AC5080 to mis-predict 16 out of 25 UDDS NOX values by over 20%. It was concluded generally that information is needed on both the transient and steady high speed emissions characteristics of a vehicle before an emissions factor can be estimated for a road link.
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Authors
- Kuntal A. Vora - National Research Center for Alternative Fuels, Engines and Emissions West Virginia University
- Nigel Clark - National Research Center for Alternative Fuels, Engines and Emissions West Virginia University
- Ralph D. Nine - National Research Center for Alternative Fuels, Engines and Emissions West Virginia University
- Mridul Gautam - National Research Center for Alternative Fuels, Engines and Emissions West Virginia University
- W. Scott Wayne - National Research Center for Alternative Fuels, Engines and Emissions West Virginia University
- Gregory J. Thompson - National Research Center for Alternative Fuels, Engines and Emissions West Virginia University
- Donald W. Lyons - National Research Center for Alternative Fuels, Engines and Emissions West Virginia University
Citation
Vora, K., Clark, N., Nine, R., Gautam, M. et al., "Correlation Study of PM and NOx for Heavy-Duty Vehicles Across Multiple Drive Schedules," SAE Technical Paper 2004-01-3022, 2004, https://doi.org/10.4271/2004-01-3022.Also In
Emissions Measurement and Testing, Advanced Catalysts and Substrates, and Diesel Gaseous Emissions
Number: SP-1899; Published: 2004-10-25
Number: SP-1899; Published: 2004-10-25
References
- Lloyd, A.C. Cackette, T.A. “Diesel Engines: Environmental Impact and Control,” Journal of the Air & Waste Management Association 51 809 847 June 2001
- Weinblatt, H. Dulla, R.G. Clark, N.N. “Vehicle Activity-Based Procedure for Estimating Emissions of Heavy-Duty Vehicles,” Transportation Research Record (Journal of the Transportation Research Board) 1842 Air Quality and Fuels 64 72 2003
- Clark, N.N. Azu, A. Jarrett, R. Balon, T. Moynihan, P. Lynch, S. Webb, T. “Operating Envelopes of Hybrid Bus Engines,” SAE Transactions 2001 Journal of Engines 110 2214 2225 2002
- Yanowitz, J. Graboski, M.S. McCormick, R.L. “Prediction of In-Use Emissions of Heavy-Duty Diesel Vehicles from Engine Testing,” Environmental Science Technology 36 270 275 2002
- Graboski, M.S. Yanowitz, J. McCormick, R.L. “In- Use Emissions From Heavy-Duty Vehicles Operating in the Colorado Northern Front Range Area,” 8th CRC On-Road Vehicle Emissions Workshop San Diego, CA 1998
- Taylor, S.T. Clark, N.N. Gautam, M. Wayne, W.S. “Diesel Emissions Prediction from Dissimilar Cycle Scaling,” Journal of Automobile Engineering 218 341 352 2004
- Clark, N.N. Wayne, W.S. Nine, R.D. Buffamonte, T.M. Hall, T. Rapp, B.L. Thompson, G. Lyons, D.W. “Emissions from Diesel-Fueled Heavy-Duty Vehicles in Southern California,” SAE/JSAE Spring Fuels & Lubricants Meeting Yokohama, Japan JSAE Paper 20030232 SAE Paper 2003-01-1901 2003
- Clark, N.N. Tehranian, A. Nine, R.D. Jarrett, R. “Translation of Distance-Specific Emissions Rates between Different Chassis Test Cycles using Artificial Neural Networks,” SAE Spring 2002 Fuels & Lubricants Meeting Reno, NV SAE Paper 2002-01-1754 2002
- EPA Document “Draft Design and Implementation Plan for EPA's Multi-Scale Motor Vehicle and Equipment Emission System (MOVES),” October 2002
- Clark, N.N. Gajendran, P. Kern, J.M. “A Predictive Tool for Emissions from Heavy-Duty Diesel Vehicles,” Environmental Science & Technology 37 1 7 15 2003
- Gajendran, P. Clark, N.N. “Effect of Truck Operating Weight on Heavy Duty Diesel Emissions,” Environmental Science & Technology 37 18 4309 4317 2003
- Clark, N.N. Gautam, M. Wayne, W.S. Thompson, G. Lyons, D.W. Nine, R.D. “Heavy Heavy-Duty Truck Regulated Emissions, Re-flash Benefits and Effect of Test Weight in the E55 Phase 1.5 Study,” 14th Coordinating Research Council On-Road Vehicle Emissions Workshop March 29 31 San Diego, CA 2004
- Gautam, M. Clark, N. Lyons, D. Long, Jr.,T. Howell, A. Loth, J. Palmer, G. Bata, R. “Design Overview of a Heavy-Duty Mobile Vehicle Emissions Testing Laboratory,” ASME 40 Advanced Automotive Technologies 1991
- Wang, W.G. Palmer, G.N. Bata, R.M. Clark, N.N. Gautam, M. Lyons, D.W. “Determination of Heavy-duty Vehicle Energy Consumption by a Chassis Dynamometer,” SAE Transactions Journal of Commercial Vehicles 101 687 696 1992
- Clark, N.N. Gautam, M. Bata, R.M. Loth, J. Palmer, G.M. Wang, W.G. Lyons, D.W. “Design and Operation of a New Transportable Laboratory for Emissions Testing of Heavy-duty Trucks and Buses,” International Journal of Vehicle Design 2 3 4 285 299 1995
- Urban, C. “Dynamometer Simulation of Truck and Bus Road Horsepower for Transient Emissions Evaluations,” SAE Paper 840349
- Code of Federal Regulations 40 Office of the Federal Register National Archives and Records Administration Washington D.C. 1991