Highlights A diesel vehicle was driven at various levels of aggressiveness on public roads. Instantaneous vehicle energy was determined taking road gradient into account. Aggregate and instantaneous energy was shown to correlate well with NOX emissions. With road gradient, the correlation remained regardless of driver aggressiveness. Potential application in developing better emissions models.
Abstract This study explores the influence of different driving styles and road gradient profiles on emissions in a diesel passenger vehicle on urban driving. Driving dynamics parameters were correlated with cumulative emissions measured during on-road driving on urban roads. In this work, the vehicle was driven on two different urban routes, one with mostly hilly roads and the other with predominately flat roads to assess the effect of road gradient on emissions. Each route was driven six times, the first drive on each route was driven very timidly, each subsequent drive systematically became more aggressive with the sixth drive being very aggressive. From the vehicle speed and road gradient data, the instantaneous vehicle energy was estimated and correlated against the instantaneous emission. In order to investigate for monotonic relationships, Spearmans rank correlation coefficient was used to investigate potential correlations between emissions and driving parameters. A strong positive correlation was observed between instantaneous emissions and instantaneous vehicle energy irrespective of the driving behaviour. The correlation of driving dynamics parameters with emissions also showed a similar trend indicating that driving aggressiveness and vehicle emissions have a strong relationship. Also there is evidence that the influence of road gradient on emissions decreases with an increase in driving aggressiveness.
An investigation into the effect of road gradient and driving style on emissions from a diesel vehicle driven on urban roads
Transportation Research Part D: Transport and Environment ; 72 ; 220-231
2019-01-01
12 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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