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On Board Fast Measurement of Vehicle NOx Emissions
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 03, 2018 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
An on-board version of a fast response chemiluminsescence analyzer with a 3-millisecond response time enables the recording of high temporal resolution transient NOx emissions during cold start and pull-away, gear changes, speed bumps and other real world transient conditions. Tests were initially performed on a 1.6 litre turbo GDI vehicle before comparison with a diesel vehicle. The data has been correlated with on-board engine data available from the vehicle’s electronic control unit to study the underlying causes of these short-duration events. Exhaust gas was generally sampled from downstream of the after treatment system but before the silencer (muffler) to preserve all high frequency detail and to allow accurate integration of pollutant concentration and engine exhaust mass flow. Various aspects of the vehicle’s calibration are seen to contribute to the short-duration, but significant, bursts of tailpipe emissions, which would not be visible to the same resolution with slower response analyzers.
CitationDuckhouse, M., Peckham, M., Bradley, H., Irwin, M. et al., "On Board Fast Measurement of Vehicle NOx Emissions," SAE Technical Paper 2018-01-0646, 2018, https://doi.org/10.4271/2018-01-0646.
Data Sets - Support Documents
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