Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 3 of 3
Full-Text Articles in Entire DC Network
Juxtaposition Of In-Use Vehicular Emissions Measurement Equipment, Brock A. Merritt
Juxtaposition Of In-Use Vehicular Emissions Measurement Equipment, Brock A. Merritt
Graduate Theses, Dissertations, and Problem Reports
A study was performed to compare measurement capabilities of two commercially available in-use portable emissions measurement systems, from different generations, in order to determine how or if changes to emissions testing standards have affected in-use equipment. The two in-use systems from different generations were the Sensors, Inc. SEMTECH-D, which would be considered first generation because it was built under the CFR 40, Part 86 standard, and the Horiba, Ltd. OBS-2200, which was considered second generation because it was built under the updated CFR 40, Part 1065 standards. Both systems underwent a series of tests in the laboratory and on-road. For …
Model Based Evaluation Of The Differences Between Full And Partial Flow Particulate Matter Sampling Systems, Nathan Kimble
Model Based Evaluation Of The Differences Between Full And Partial Flow Particulate Matter Sampling Systems, Nathan Kimble
Graduate Theses, Dissertations, and Problem Reports
PM has been shown to be harmful to people, animals, and the environment. For this reason PM is a regulated emission. As federal regulation of particulate matter (PM) becomes tighter, the need to accurately measure it becomes paramount. As the limit decreases, it becomes more difficult to measure PM due to the inaccuracies in the measurement equipment, and the nature of the particles to be lost in the sampling system.;This study investigated the error propagation and particle loss in two common PM mass measurement systems, the full flow sampling system, also called the constant volume sampling (CVS), and the partial …
Study Of Transit Bus Duty Cycle And Its Influence On Fuel Economy And Emissions Of Diesel-Electric Hybrids, Jairo A. Sandoval Leon
Study Of Transit Bus Duty Cycle And Its Influence On Fuel Economy And Emissions Of Diesel-Electric Hybrids, Jairo A. Sandoval Leon
Graduate Theses, Dissertations, and Problem Reports
The Center for Alternative Fuels, Engines, and Emissions (CAFEE) of West Virginia University (WVU) is developing the Integrated Bus Information System (IBIS), an information resource on transit bus emissions for vehicle procurement purposes. IBIS provides the transit bus industry with exhaust emissions information, including an emissions database, and predictive models for fuel economy (F.E.) and emissions. Inputs for the models are in the form of drive cycle metrics, but the knowledge of such metrics is not readily available for transit agencies.;The first part of this dissertation was an effort to close the gap between engineering drive cycle metrics and the …