Chemistry Commons^™

On-Road Emissions In Asia Measured By Remote Sensing (Presentation), Donald H. Stedman, Gary A. Bishop

Fuel Efficiency Automobile Test Publications

No abstract provided.

On-Road Emissions In Asia Measured By Remote Sensing, Donald H. Stedman, Gary A. Bishop, Niranjan Vescio, Nitin Manawat, Peter Mcclintock

Fuel Efficiency Automobile Test Publications

On-road emissions are precisely the emissions which are impacting the air quality and which need to be controlled if air quality improvements are desired. Remote sensing measures mass emissions of CO, HC, NO and smoke per kg (or per L) of fuel burned. On-road emissions are not certification emissions for new vehicles, although new vehicles measured on-road most often provide remote sensing readings well within their certification values. On-road emissions are not the same as readings from scheduled emission tests, although on average the two correlate very well. The major difference between scheduled emission tests and on-road emissions readings is …

Infrared Thermal Imaging Of Automobiles: Identification Of Cold Start Vehicles, Angela M. Monateri, Donald H. Stedman

Fuel Efficiency Automobile Test Publications

No abstract provided.

On-Road Remote Sensing Of Automobile Emissions In The Tulsa Area: Year 1, September 2003, Gary A. Bishop, Daniel A. Burgard, Donald H. Stedman

Fuel Efficiency Automobile Test Publications

No abstract provided.

On-Road Remote Sensing Of Automobile Emissions In The La Brea Area: Year 3, October 2003, Gary A. Bishop, Daniel A. Burgard, Donald H. Stedman

Fuel Efficiency Automobile Test Publications

No abstract provided.

A History Of On-Road Emissions And Emissions Deterioration (Presentation), Donald H. Stedman, Gary A. Bishop

Fuel Efficiency Automobile Test Publications

No abstract provided.

High Temperature And Fuel Impacts On Hc Emissions (Presentation), Richard Barrett, Donald H. Stedman

Fuel Efficiency Automobile Test Publications

No abstract provided.

Infrared Thermal Imaging Of Automobiles (Presentation), Angela M. Monateri, Donald H. Stedman, Gary A. Bishop

Fuel Efficiency Automobile Test Publications

No abstract provided.

On-Road Motor Vehicle Emissions From Around The World, Donald H. Stedman, Gary A. Bishop

Fuel Efficiency Automobile Test Publications

In 1993, on-road emissions in Continental Europe showed a pronounced South/North declining gradient for CO, HC and NO fuel specific emissions (gm/kg). Emissions in Hamburg and Rotterdam were comparable to emissions measured in 1993 in the U.S.A. with the same on-road instrument. Contrasts between emissions in the USA, the UK and Sweden demonstrated the importance both of modern catalysts and of good maintenance. The same contrast in 1998 shows the same picture but lower emissions at all three locations. In the decade from 1993-2003, U.S. emissions have declined markedly, apparently mainly as a result of lower emitting, better maintained, new …

Atmospheric Variability Of Methyl Chloride During The Last 300 Years From An Antarctic Ice Core And Firn Air, M. Aydin, Eric S. Saltzman, Warren J. De Bruyn, S. A. Montzka, J. H. Butler, M. Battle

Biology, Chemistry, and Environmental Sciences Faculty Articles and Research

Measurements of methyl chloride (CH3Cl) in Antarctic polar ice and firn air are used to describe the variability of atmospheric CH3Cl during the past 300 years. Firn air results from South Pole and Siple Dome suggest that the atmospheric abundance of CH3Cl increased by about 10% in the 50 years prior to 1990. Ice core measurements from Siple Dome provide evidence for a cyclic natural variability on the order of 10%, with a period of about 110 years in phase with the 20th century rise inferred from firn air. Thus, the CH3Cl increase measured in firn air may largely be …

On-Road Remote Sensing Of Automobile Emissions In The Phoenix Area: Year 4, November 2002, Gary A. Bishop, Daniel A. Burgard, Mitchell J. Williams, Donald H. Stedman

Fuel Efficiency Automobile Test Publications

No abstract provided.

On-Road Remote Sensing Of Automobile Emissions In The Chicago Area: Year 5, September 2002, Gary A. Bishop, Mitchell J. Williams, Daniel A. Burgard, Donald H. Stedman

Fuel Efficiency Automobile Test Publications

No abstract provided.

On-Road Remote Sensing Of Automobile Emissions In The Denver Area: Year 4, January 2003, Daniel A. Burgard, Gary A. Bishop, Mitchell J. Williams, Donald H. Stedman

Fuel Efficiency Automobile Test Publications

No abstract provided.

On-Road Remote Sensing Of Automobile Emissions In The Labrea Area: Year 2, Mitchell J. Williams, Gary A. Bishop, Donald H. Stedman

Fuel Efficiency Automobile Test Publications

No abstract provided.

Fuel Efficiency Automobile Test Standard Operating Procedures, Donald H. Stedman, Gary A. Bishop

Fuel Efficiency Automobile Test Publications

No abstract provided.

Feat Monochromator User's Guide, Gary A. Bishop

Fuel Efficiency Automobile Test Publications

No abstract provided.

A Five-Channel, Single Detector, Emission Remote Sensor (Presentation), Mitchell J. Williams, Donald H. Stedman, Gary A. Bishop, Richard W. Quine

Fuel Efficiency Automobile Test Publications

No abstract provided.

On-Road Emissions Of Motor Vehicles In Brazil: Current Status And Future Possibilities (Presentation), Donald H. Stedman

Fuel Efficiency Automobile Test Publications

No abstract provided.

On-Road Remote Sensing Of Automobile Emissions In The Los Angeles Area: Year 3 (Riverside), Sajal S. Pokharel, Gary A. Bishop, Donald H. Stedman

Fuel Efficiency Automobile Test Publications

The University of Denver conducted the third year of a multi-year remote sensing study in the Los Angeles, CA area. The remote sensor used in this study is capable of measuring the ratios of CO, HC, and NO to CO2 in motor vehicle exhaust. From these ratios, we calculate the percent concentrations of CO, CO2, HC and NO in motor vehicle exhaust which would be observed by a tailpipe probe, corrected for water and any excess oxygen not involved in combustion. The system used in this study was also configured to determine the speed and acceleration of the vehicle, and …

On-Road Remote Sensing Of Automobile Emissions In The Phoenix Area: Year 3, Sajal S. Pokharel, Gary A. Bishop, Donald H. Stedman

Fuel Efficiency Automobile Test Publications

The University of Denver conducted a five-day remote sensing study in the Phoenix, AZ area in the fall of 2000. The remote sensor used in this study is capable of measuring the ratios of CO, HC, and NO to CO2 in motor vehicle exhaust. From these ratios, we calculate mass emissions per kg (or gallon) of fuel and the percent concentrations of CO, CO2, HC and NO in motor vehicle exhaust which would be observed by a tailpipe probe, corrected for water and any excess oxygen not involved in combustion. The system used in this study was also configured to …

Opacity Enhancement Of The On-Road Remote Sensor For Hc, Co And No, Donald H. Stedman, Gary A. Bishop

Fuel Efficiency Automobile Test Publications

No abstract provided.

Remote Sensing: A New Tool For Automobile Inspection And Maintenance, Donald H. Stedman

Fuel Efficiency Automobile Test Publications

Federally-mandated emissions testing of automobiles in Colorado has decreased emissions, albeit much less than predicted. Recent breakthroughs in manufacturing low emitting vehicles and in remote sensing of a moving car’s exhaust could enable Colorado to phase out or drastically increase the efficiency of treadmill-style testing centers. Remote sensing technology now allows a piece of equipment small enough to fit in a van to assess the mass of pollutants per gallon of fuel emitted by a passing car. Once an emissions scofflaw is identified, a number of options exist:

· immediate pullover and ticketing by a police officer;

· a “smart …

On-Road Remote Sensing Of Automobile Emissions In The Denver Area: Year 3, Sajal S. Pokharel, Gary A. Bishop, Donald H. Stedman

Fuel Efficiency Automobile Test Publications

No abstract provided.

Interpreting Remote Sensing Nox Measurements (Presentation), Robert Slott, Donald H. Stedman, Sajal S. Pokharel

Fuel Efficiency Automobile Test Publications

No abstract provided.

On-Road Remote Sensing Of Automobile Emissions In The Chicago Area: Year 4, Sajal S. Pokharel, Gary A. Bishop, Donald H. Stedman

Fuel Efficiency Automobile Test Publications

The University of Denver has completed the first four years of a multi-year remote sensing study in the Chicago area. The remote sensor used in this study is capable of measuring the ratios of CO, HC, and NO to CO2 in motor vehicle exhaust. From these ratios, we calculate the percent concentrations of CO, CO2, HC and NO in the exhaust that would be observed by a tailpipe probe, corrected for water and any excess oxygen not involved in combustion. Mass emissions per mass or volume of fuel can also be determined. The system used in this study was configured …

Preliminary Studies Using Remote Sensing To Evaluate I/M Effectiveness, Sajal S. Pokharel, Gary A. Bishop, Donald H. Stedman

Fuel Efficiency Automobile Test Publications

No abstract provided.

Motorcycle Emissions System (Presentation), Donald H. Stedman

Fuel Efficiency Automobile Test Publications

Multireflection optics for noncontact measurement of small emissions plumes

On-Road Motor Vehicle Emissions Measurements Worldwide (Presentation), Sajal S. Pokharel, Gary A. Bishop, Donald H. Stedman

Fuel Efficiency Automobile Test Publications

No abstract provided.

Fuel-Based On-Road Motor Vehicle Emissions Inventory For The Denver Metropolitan Area, Sajal S. Pokharel, Gary A. Bishop, Donald H. Stedman

Fuel Efficiency Automobile Test Publications

Emission inventories from mobile sources have traditionally been obtained through computer modeling. This method, however, has intrinsic shortcomings in that ideal factors are included while real-world observations are left out. The model predictions have not correlated well with measurements from several studies. Recently, a fuel-based method of obtaining on-road emissions inventories has been developed. This technique calculates emission factors in grams of pollutant per unit of fuel used (kg, gallons or L) from remote sensing measurements. Combining these factors with fuel use data, available from tax records, yields a fuel based emission inventory. We have used this routine to calculate …

Fuel-Based On-Road Motor Vehicle Emissions Inventory For The Denver Metropolitan Area (Presentation), Sajal S. Pokharel, Gary A. Bishop, Donald H. Stedman

Fuel Efficiency Automobile Test Publications

No abstract provided.