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Application of a portable FTIR for measuring on-road emissions

Daham, Basil, Andrews, Gordon E., Li, Hu, Rosario, Ballesteros, Bell, Margaret, Tate, James and Ropkins, Karl (2005) Application of a portable FTIR for measuring on-road emissions. In: SAE Book SP-1941: Emissions Measurement and Testing 2005. Society of Automotive Engineers , USA , pp. 171-192. ISBN 0-7680-1586-32005

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The objective of this work was the development of an onroad in-vehicle emissions measurement technique utilizing a relatively new, commercial, portable Fourier Transform Infra-Red (FTIR) Spectrometer capable of identifying and measuring (at approximately 3 second intervals) up to 51 different compounds. The FTIR was installed in a medium class EURO1 spark ignition passenger vehicle in order to measure on-road emissions. The vehicle was also instrumented to allow the logging of engine speed, road speed, global position, throttle position, air-fuel ratio, air flow and fuel flow in addition to engine, exhaust and catalyst temperatures. This instrumentation allowed the calculation of massbased emissions from the volume-based concentrations measured by the FTIR. To validate the FTIR data, the instrument was used to measure emissions from an engine subjected to a real-world drive cycle using an AC dynamometer. Standard analyzers were operated simultaneously for comparison with the FTIR and the standard analyzer results showed that most pollutants (NOx, CO2, CO) were within ~10% of a standard analyzer during steady state conditions and within 20% during transients. The exception to this was total HC which was generally 50% or less than actual total HC, but this was due to the limited number of hydrocarbons measured by the FTIR. In addition to the regulated emissions, five toxic hydrocarbon species were analyzed and found to be sensitive to cold starts in varying proportions. Finally, FTIR data was compared to results from a commercially available on-road measurement system (Horiba OBS- 1000), and there was good agreement.

Item Type: Book Section
Copyright, Publisher and Additional Information: © 2005 SAE International. Published on this website with permission from SAE International. As a user of this website, you are permitted to view this paper on-line, download the .pdf file and print one copy of this papers at no cost for your use only. The downloaded .pdf file and printout of this SAE papers may not be copied, distributed or forwarded to others or for the use of others.
Keywords: FTIR, emissions,
Institution: The University of Leeds
Academic Units: The University of Leeds > Faculty of Engineering (Leeds) > School of Chemical & Process Engineering (Leeds) > Energy Research Institute (Leeds)
Depositing User: Hu Li
Date Deposited: 12 Mar 2007
Last Modified: 07 Jun 2014 00:24
Published Version: http://www.sae.org/technical/papers/2005-01-0676
Status: Published
Publisher: Society of Automotive Engineers
Refereed: Yes
Identification Number: SAE Paper # 2005-01-0676
URI: http://eprints.whiterose.ac.uk/id/eprint/2043

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