The influence of ambient temperature on exhaust emissions for an instrumented Euro 1 SI car was determined. A real world test cycle was used, based on an urban drive cycle that was similar to the ECE urban drive cycle. It was based on four laps of a street circuit and an emissions sample bag was taken for each lap. The bag for the first lap was for the cold start emissions. An in-vehicle direct exhaust dual bag sampling technique was used to simultaneously collect exhaust samples upstream and downstream of the three-way catalyst (TWC). The cold start tests were conducted over a year, with ambient temperatures ranging from - 2 deg C to 32 deg C. The exhaust system was instrumented with thermocouples so that the catalyst light off temperature could be determined. The results showed that CO emissions for the cold start were reduced by a factor of 8 downstream of catalyst when ambient temperature rose from -2 deg C to 32 deg C, the corresponding hydrocarbon emissions were reduced by a factor of 4. There was no clear relationship between NOx emissions and ambient temperature. For subsequent laps of the test circuit the reduction of CO and HC emissions as a function of ambient temperature was lower. The time for catalyst light off increased by 50% as the ambient temperature was reduced. The results show that the vehicle used is unlikely to meet the new - 7C cold start CO emission regulations.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    The effect of ambient temperature on cold start urban traffic emissions for a real world SI car


    Beteiligte:
    Andrews, Gordon E. (Autor:in) / Zhu, Grant (Autor:in) / Li, Hu (Autor:in) / Simpson, Alex (Autor:in) / Bell, Margaret (Autor:in) / Tate, James (Autor:in) / Wylie, James A. (Autor:in)


    Erscheinungsdatum :

    2004


    Format / Umfang :

    18 Seiten, 30 Bilder, 3 Tabellen, 27 Quellen




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    The Effect of Ambient Temperature on Cold Start Urban Traffic Emissions for a Real World SI Car

    Simpson, Alex / Andrews, Gordon E. / Zhu, Grant et al. | SAE Technical Papers | 2004



    The Effect of Ambient Temperature on Cold Start Urban Traffic Emissions for a Real World SI Car

    Andrews, G. E. / Zhu, G. / Li, H. et al. | British Library Conference Proceedings | 2004


    Cold Start SI Passenger Car Emissions from Real World Urban Congested Traffic

    Khalfan, Ahmad / Andrews, Gordon / Li, Hu | SAE Technical Papers | 2015


    Cold Start SI Passenger Car Emissions from Real World Urban Congested Traffic

    Khalfan, Ahmad / Li, Hu / Andrews, Gordon | British Library Conference Proceedings | 2015