A comparison of a mini-PEMS and a 1065 compliant PEMS for on-road gaseous and particulate emissions from a light duty diesel truck.
Jiacheng Yang,Thomas D. Durbin,Yu Jiang,Takeshi Tange,Georgios Karavalakis,David R. Cocker,Kent C. Johnson +6 more
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TLDR
There could be applications for the NCEM or other mini-PEMS for applications such as identification of potential issues by regulatory agencies, manufacturer evaluation and validation of emissions under in-use conditions, and potential use in inspection and maintenance (I/M) programs, especially for heavy-duty vehicles.About:
This article is published in Science of The Total Environment.The article was published on 2018-11-01 and is currently open access. It has received 13 citations till now.read more
Figures
Fig. 1. NCEM NOx measurement design schematic. 
Fig. 9. Q-Q plot analysis for PN emissions for 1 day of testing. 
Fig. 5. Q-Q plot analysis on NOx emissions for 1 day of testing. 
Table 3 Summary of 25th and 75th percentile Q-Q plot values for NOx, PM, and PN emissions. 
Table 4 Summary of correlation slope and regression statistics for NOx emissions NOx (g/s). 
Table 6 Summary of correlation slope and regression statistics for PM and soot emissions.
Citations
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Journal ArticleDOI
Real-world particle and NOx emissions from hybrid electric vehicles under cold weather conditions.
TL;DR: In this paper, the authors measured emissions from two vehicles driving city and highway routes in Minneapolis, Minnesota in the winter (−5°C) and looked for major differences in emissions relative to each vehicle and relative to results that would be obtained from a chassis dynamometer in a controlled laboratory setting at a higher temperature approximately 20°C.
Journal ArticleDOI
Sensitivity of light duty vehicle tailpipe emission rates from simplified portable emission measurement systems to variation in engine volumetric efficiency.
TL;DR: In this article, the authors evaluated the suitability of SDM-based estimates of MAF in conjunction with simplified and micro-PEMS for quantification of vehicle tailpipe emissions.
Journal ArticleDOI
NOx Emission of a Correlation between the PEMS and SEMS over Different Test Modes and Real Driving Emission
TL;DR: In this article, the reliability of NOx emissions measured using Smart Emissions Measurement System (SEMS) equipment in comparison with the NOx emission measured using certified portable emissions measurement system (PEMS) is compared.
References
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Journal ArticleDOI
Comprehensive Field Study of Fuel Use and Emissions of Nonroad Diesel Construction Equipment
TL;DR: In this paper, a portable emissions monitoring system was used to collect fuel use and emissions data from eight backhoes, six bulldozers, three excavators, four generators, six motor graders, three off-road trucks, one skid-steer loader, three track loaders, and five wheel loaders while they performed various duty cycles.
Journal ArticleDOI
Evaluation and Comparison of Portable Emissions Measurement Systems and Federal Reference Methods for Emissions from a Back-Up Generator and a Diesel Truck Operated on a Chassis Dynamometer
Thomas D. Durbin,Kent C. Johnson,David R. Cocker,J. Wayne Miller,Hector Maldonado,Atul Shah,Carl D. Ensfield,Christopher S. Weaver,Mike Akard,Neal Harvey,James Symon,Thomas Lanni,William D. Bachalo,Greg Payne,Greg Smallwood,Manfred Linke +15 more
TL;DR: In this study, four commercial PEMS were compared with a Federal Reference Method for measuring emissions from a back-up generator over steady-state loads and a diesel truck on transient and steady- state chassis dynamometer tests.
Journal ArticleDOI
Evaluations of in-use emission factors from off-road construction equipment
Tanfeng Cao,Thomas D. Durbin,Robert L. Russell,David R. Cocker,George Scora,Hector Maldonado,Kent C. Johnson +6 more
TL;DR: In this paper, the authors used 40 CFR part 1065 compliant portable emissions measurement system (PEMS) for all regulated gaseous and particulate emissions from construction equipment. But, the results of their study were limited to a test fleet of newer construction equipment (model year 2002 or later).
Journal ArticleDOI
On-road comparison of a portable emission measurement system with a mobile reference laboratory for a heavy-duty diesel vehicle
Kent C. Johnson,Thomas D. Durbin,David R Cocker,Wayne Miller,Dipak Bishnu,Hector Maldonado,Nate Moynahan,C. Ensfield,Christopher A. Laroo +8 more
TL;DR: In this paper, on-road comparisons between a mobile emissions laboratory (MEL) meeting federal standards and a portable emissions measurement system (PEMS) were made over different conditions; including road grade, vibration, altitude, electric fields, and humidity with the PEMS mounted inside and outside of the tractor's cab.
Journal ArticleDOI
In-Use Emissions Testing with Portable Emissions Measurement Systems (PEMS) in the Current and Future European Vehicle Emissions Legislation: Overview, Underlying Principles and Expected Benefits
Theodoros Vlachos,Pierre Bonnel,Adolfo Perujo,Martin Weiss,Pablo Mendoza Villafuerte,Francesco Riccobono +5 more