Publication Date
1-21-2015
Document Type
Article
Keywords
Atmospheric chemistry, Diesel engines, Emissions
Abstract
The introduction of particulate and oxides of nitrogen (NOx) after-treatment controls on heavy-duty vehicles has spurred the need for fleet emissions data to monitor their reliability and effectiveness. The University of Denver has developed a new method for rapidly measuring heavy-duty vehicles for gaseous and particulate fuel specific emissions. The method was recently used to collect 3,088 measurements at a Port of Los Angeles location and a weigh station on I-5 in northern California. The weigh station NOx emissions for 2014 models are 73% lower than 2010 models (3.8 vs. 13.9 gNOx/kg of fuel) and look to continue to decrease with newer models. The Port site has a heavy-duty fleet that has been entirely equipped with diesel particulate filters since 2010. Total particulate mass and black carbon measurements showed that only 3% of the Port vehicles measured exceed expected emission limits with mean gPM/kg of fuel emissions of 0.031 ± 0.007 and mean gBC/kg of fuel emissions of 0.020 ± 0.003. Mean particulate emissions were higher for the older weigh station fleet but 2011 and newer trucks gPM/kg of fuel emissions were nevertheless more than a factor of 30 lower than the means for pre-DPF (2007 & older) model years.
Data Collections
OHMS
Copyright Statement / License for Reuse
This work is licensed under a Creative Commons Attribution-No Derivative Works 4.0 International License.
Rights Holder
Gary A. Bishop, Rachel Hottor-Raguindin, Donald H. Stedman, Peter McClintock, Ed Theobald, Jeremy D. Johnson, Doh-Won Lee, Josias Zietsman, Chandan Misra
Provenance
Received from author
File Format
application/pdf
Language
English (eng)
Extent
36 pgs
File Size
508 KB
Publication Statement
This is an Accepted Manuscript for
Bishop, G.S., Hottor-Raguindin, R., Stedman, D.H., McClintock, P., Theobald, E., Johnson, J.D., Lee, D-W., Zietsman , J., & Misra, C. (2015). On-road heavy-duty vehicle emissions monitoring system. Environmental Science & Technology, 49(3),1639-1645. Doi: 10.1021/es505534e
Copyright held by the American Chemical Society. User is responsible for all copyright compliance.
Recommended Citation
Bishop, G.S., Hottor-Raguindin, R., Stedman, D.H., McClintock, P., Theobald, E., Johnson, J.D., Lee, D-W., Zietsman , J., & Misra, C. (2015). On-road heavy-duty vehicle emissions monitoring system. Environmental Science & Technology, 49(3),1639-1645. Doi: 10.1021/es505534e
DOI Link
https://doi.org/10.1021/es505534e