The paper intends to asses the actual impact of speed and acceleration on exhaust pollutant emissions. For this purpose, actual driving recordings were used. Kinematic sequences were randomly selected amongst the recorded data, in order to constitute a representative set of driving conditions. For each sequence, average levels of speed and positive acceleration were calculated. Instantaneous and integrated pollutant emissions were calculated using an emission model, based on instantaneous emission measurements on a chassis dynamometer using actual driving cycles, over a sample of 150 european cars. Emissions of CO, CO2, HC, NOx were analysed considering the average speed and positive acceleration, for different categories of vehicles Diesel, conventional and catalyst vehicles, and finally the whole French car fleet, using weighting coefficients for the different categories. For all types of vehicle a significant influence of speed on emissions is observed. The acceleration impact is relatively low, and is much lower than the influence observed at a microscopic level (i.e. when considering instantaneous values), except for the catalyst vehicles that show the strongest dependence upon acceleration. This low incidence on emissions shows that the potential emission reduction through the traffic conditions improvement could be relatively limited.


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    Titel :

    Relative influence of acceleration level and speed on emissions, within actual driving conditions


    Weitere Titelangaben:

    Einfluß von Beschleunigung und Geschwindigkeit auf die Schadstoffemissionen im realen Fahrverhalten


    Beteiligte:
    Andre, M. (Autor:in) / Pronello, C. (Autor:in)


    Erscheinungsdatum :

    1996


    Format / Umfang :

    13 Seiten, 6 Bilder, 7 Tabellen, 3 Quellen


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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    Andre,M. / Pronello,C. / Politecnico di Torino,IT | Kraftfahrwesen | 1996



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    Andre,M. / Pronello,C. / Inst.National de Recherche sur les Transports et leurs Securite,INRETS,FR et al. | Kraftfahrwesen | 1997



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