The exhaust emissions of off-road and utility engines have recently come under increasingly thorough scrutiny and are now becoming the subject of federal regulations. While the most straightforward emissions guidelines relate to steady-state engine performance, it is well known that duty cycles of many small engines have a transient content and that its significance can vary strongly from application to application. Hence, it is important to examine how measured emissions change when the transient content of a test cycle is varied, and what kinds of steady-state and transient test cycles might realistically imitate operational conditions. These questions have been addressed in an experimental study in which several small two- and four-stroke engines have been tested under steady state and transient cycles. The same tests were also carried out when these engines had been adjusted to operate at leaner air-fuel ratios, as might be required by forthcoming regulations. The results of this study reveal some appreciable differences between steady-state and transient emissions of engines, particularly at leaner air-fuel ratios.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Measured Emissions of Small Engines under Steady State and Transient Operation


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Patterson, D. J. (Autor:in) / Schwartz, G. (Autor:in) / Brereton, G. J. (Autor:in) / Chishty, H. A. (Autor:in) / Morrison, K. (Autor:in)

    Kongress:

    International Off-Highway & Powerplant Congress & Exposition ; 1994



    Erscheinungsdatum :

    1994-09-01




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Measured emissions of small engines under steady state and transient operation

    Brereton,G.J. / Morrison,K. / Chishty,H.A. et al. | Kraftfahrwesen | 1994


    Effects of Steady-State and Transient Operation on Exhaust Emissions from Nonroad and Highway Diesel Engines

    Jackson, Cleophas C. / Samulski, Michael J. | SAE Technical Papers | 1998


    Effects of steady-state and transient operation of exhaust emissions from nonroad and highway diesel engines

    Samulski,M.J. / Jackson,C.C. / Environmental Protection Agency,US | Kraftfahrwesen | 1998


    Particle Emissions from SI-Engines During Steady State and Transient Operating Conditions

    Kasper, A. / Kittelson, D. B. / Weingartner, E. et al. | SAE Technical Papers | 2005