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
Solid Particle Number (SPN) Portable Emissions Measurement Systems (PEMS) in the European Legislation: A Review.
TL;DR: This paper gives an overview of the studies for SPN-PEMS from early 2013 with the first prototypes until the latest testing and improvements in 2019, and addresses measurement uncertainty at the on-road emission results measured with PEMS.
Journal ArticleDOI
On-road gaseous and particulate emissions from GDI vehicles with and without gasoline particulate filters (GPFs) using portable emissions measurement systems (PEMS)
Cavan McCaffery,Hanwei Zhu,Chengguo Li,Thomas D. Durbin,Kent C. Johnson,Heejung Jung,Rasto Brezny,Michael R. Geller,Georgios Karavalakis,Georgios Karavalakis +9 more
TL;DR: The results showed strong reductions in particulate mass (PM), soot mass, and particle number emissions with the use of GPFs, and nitrogen oxide (NOx) emissions showed improvements with the catalyzed GPFs in the underfloor position with the additional catalytic volume.
Journal ArticleDOI
An interdisciplinary review on calibration strategies of engine management system for diverse alternative fuels in IC engine applications
Ashwin Jacob,B. Ashok +1 more
TL;DR: An advanced calibration methodology is proposed for flex-fuel engines in this study based on the knowledge gained through the preparation of this article and complex optimizers like neural networks can be used in the proposed methodology to initiate real-time calibration for ideal flex- fuel engine output responses.
Journal ArticleDOI
Particle number emissions from light-duty gasoline vehicles in Beijing, China.
TL;DR: It is found the PN emission factors (EFs) of port fuel injection (PFI) vehicles have declined considerably under stricter standards, and the optimal upper limit of the primary dilution ratio should be further studied and specified as a standard.
Journal ArticleDOI
Comparative Effects of Olefin Content on the Performance and Emissions of a Modern GDI Engine
TL;DR: The effects of different olefin contents in fuel (nominally 8.2 and 17.2% in volume) on the performance and exhaust emissions of a modern gasoline direct injection engine at speeds of 1500, 3500, a...
References
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Journal ArticleDOI
Application of the Pegasor Particle Sensor for the Measurement of Mass and Particle Number Emissions
Journal ArticleDOI
Quantifying In-Use PM Measurements for Heavy Duty Diesel Vehicles
TL;DR: This study evaluates five PM PEMS in comparison to UCR's mobile reference laboratory under in-use conditions, finding the photoacoustic measurement PEMS performed best for the non-after treatment system (ATS)-equipped engine, where the PM was mostly EC, with a linear regression slope of 0.91.
Journal ArticleDOI
Characterization of PM-PEMS for in-use measurements conducted during validation testing for the PM-PEMS measurement allowance program
M. Yusuf Khan,Kent C. Johnson,Thomas D. Durbin,Heejung Jung,David R Cocker,Dipak Bishnu,Robert Giannelli +6 more
TL;DR: In this article, the authors evaluated the performance of four Particulate Matter-Portable Emissions Measurement Systems (PM-PEMS) under different environmental and in-use conditions.