This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Real World Emissions Variability as Measured by Remote Sensors
Annotation ability available
Sector:
Language:
English
Abstract
During the fall of 1992, the Michigan Roadside Study was conducted. During this study IM240 tests were conducted on vehicles that had also been emissions tested during on-road operation via two remote sensors that were separated by 100 feet. The use of two remote sensors provided an indication of the short-term real-world emissions variability of a large number of on-road vehicles. This data was used to determine the frequency of flippers, i.e. vehicles that are sometimes high emitters (>4% CO) and at other times low emitters (<2% CO). The data show that the flipper frequency increases for older model year vehicles. Also, the correlations between remote sensor readings of emissions concentrations and IM240 mass emissions rates were determined. The data show that the correlation between remote sensing and IM240 improves with increasing numbers of remote sensing readings. For three remote sensor readings, CO correlates with an r2 of 0.69 and HC correlates with an r2 of 0.54
Recommended Content
| Technical Paper | Identifying Excess Emitters with a Remote Sensing Device: A Preliminary Analysis |
| Technical Paper | Fuel Film Dynamics in the Intake Port of a Fuel Injected Engine |
Authors
- Robert D. Stephens - General Motors Research and Development Center
- Michael T. Giles - General Motors Research and Development Center
- Peter J. Groblicki - General Motors Research and Development Center
- Robert A. Gorse - Ford Motor Co.
- Kenneth J. McAlinden - Ford Motor Co.
- Douglas B. Hoffman
- Rodger James - Michigan Dept. of State
- Sam Smith - Michigan Dept. of State
Citation
Stephens, R., Giles, M., Groblicki, P., Gorse, R. et al., "Real World Emissions Variability as Measured by Remote Sensors," SAE Technical Paper 940582, 1994, https://doi.org/10.4271/940582.Also In
Auto/Oil Air Quality Improvement Research Program - Volume Iii
Number: SP-1117; Published: 1995-10-01
Number: SP-1117; Published: 1995-10-01
References
- Stephens, R. D. Cadle, S. H. Qian, T. “Analysis of Errors of Omission and Commission Under FTP Conditions” AWMA Conference “The Emission Inventory Perception and Reality” October 18-20 1993 Pasadena, CA
- Stephens, R. D. Groblicki, P. J. Liberty, T. Gorse, R. A. Jr. McAlinden, K. Hoffman, D. Smith, S. James, R. “The Michigan Roadside Study: A Preliminary Review of Repair Induced Emissions Reductions” AWMA Conference “The Emission Inventory Perception and Reality” October 18-20 1993 Pasadena, CA
- Ashbaugh, L. L. Lawson, D. R. Bishop, G. Guenther, P. L. Stedman, D. H. Stephens, R. D. Groblicki, P. J. Parikh, J. Johnson, B. J. Huang, S. C. “On-Road Remote Sensing of Carbon Monoxide and Hydrocarbon Emissions During Several Vehicle Operating Conditions” A WMA/EPA Conference on “PM 10 Standards and Nontraditional Particulate Source Controls” Phoenix, AZ January 1992
- Lawson, D. “Los Angeles In-Use Vehicle Emissions Study: High Emitter Phase” Third Annual CRC-APRAC On-Road Vehicle Emissions Workshop San Diego, CA December 1-3 1992
- Stephens, R. D. “Remote Sensing Data and a Potential Model of Vehicle Exhaust Emissions” Third Annual CRC-APRAC On-Road Vehicle Emissions Workshop San Diego, CA December 1-3 1992
- Knepper, J. C. Koehl, W. J. Benson, J. D. Burns, V. J. Gorse, R. A. Jr. Hochhauser, A. M. Leppard, W. R. Rapp, L. A. Reuter, R. M. “Fuel Effects In Auto/Oil High Emitting Vehicles” SAE # 930137 March 1993
- Glover, E. Clemmens, W. “Identifying Excess Emitters With A Remote Sensing Device: A Preliminary Analysis” SAE 911672
- Kelly, N. A. Groblicki, P. J. “Real-World Emissions From A Modern Production Vehicle Driven In Los Angeles” December 9 1992