In-Use Emissions Testing of Diesel-Driven Buses in Southampton: Is Selective Catalytic Reduction as Effective as Fleet Operators Think?

Jonathan Sowman, Simon Box, Alan Wong, Matthew Grote, Dina Shona Laila, Neil Gordon Gillam, Andrew Cruden, Jonathan Preston, Peter Fussey

Research output: Contribution to journalArticle

2 Citations (Scopus)
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Abstract

Despite the continuously tightening emissions legislation, urban concentrations of nitrogen oxides (NOx) remain at harmful levels. Road transport is responsible for a large fraction, wherein diesel engines are the principal culprits. Turbocharged diesel engines have long been preferred in heavy duty applications, due to their torque delivery and low fuel consumption. Fleet operators are under pressure to understand and control the emissions of their vehicles, yet the performance of emissions abatement technology in real-world driving is largely unquantified. The most popular NOx abatement technology for heavy duty diesel vehicles is selective catalytic reduction. In this work, we empirically determine the efficiency of a factory-fitted SCR system in realworld driving by instrumenting passenger buses with both a portable emissions measurement system (PEMS) and a custom built telematics unit to record key parameters from the vehicle diagnostics systems. Wefindthateveninrelativelyfavourableconditions, while there is some improvement due to the use of SCR, the vehicles operate far from the design emissions targets. The archival value of this paper is in quantification of real world emissions versus design levels and the factors responsible for the discrepancy, as well as in examination of technologies to reduce this difference.
Original languageEnglish
Pages (from-to)(in press)
Number of pages6
JournalIET Intelligent Transport Systems
Volume(in press)
DOIs
Publication statusPublished - 7 Feb 2018

Fingerprint

Selective catalytic reduction
diesel
Nitrogen oxides
Testing
Thyristors
Diesel engines
diesel engine
nitrogen oxides
Fuel consumption
Industrial plants
telematics
road transport
Torque
fuel consumption
factory
torque
bus
diagnostic
legislation
road

Bibliographical note

This is an open access article published by the IET under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/)

Cite this

In-Use Emissions Testing of Diesel-Driven Buses in Southampton : Is Selective Catalytic Reduction as Effective as Fleet Operators Think? / Sowman, Jonathan; Box, Simon; Wong, Alan; Grote, Matthew; Laila, Dina Shona; Gillam, Neil Gordon; Cruden, Andrew; Preston, Jonathan; Fussey, Peter.

In: IET Intelligent Transport Systems, Vol. (in press), 07.02.2018, p. (in press).

Research output: Contribution to journalArticle

Sowman, Jonathan ; Box, Simon ; Wong, Alan ; Grote, Matthew ; Laila, Dina Shona ; Gillam, Neil Gordon ; Cruden, Andrew ; Preston, Jonathan ; Fussey, Peter. / In-Use Emissions Testing of Diesel-Driven Buses in Southampton : Is Selective Catalytic Reduction as Effective as Fleet Operators Think?. In: IET Intelligent Transport Systems. 2018 ; Vol. (in press). pp. (in press).
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