There has been concern for many years that phosphorus (P) from engine oil is volatilised, passes through the combustion chamber and is deposited on the catalyst system in passenger cars, causing the emission control system to lose efficiency. Therefore, as new engine oil specifications have been introduced, there has been a trend to require a reduction in P in fresh engine oils. The primary P source in current engine oils is zinc dithiophosphate (ZDP), which acts as an anti-wear agent and antioxidant. Therefore, a reduction in P in the oil could compromise the anti-wear and antioxidant performance of engine oils. Another detrimental effect of ZDP is that is known to increase friction in the mixed lubrication regime, which in turn would decrease the ability of engine oils to improve fuel economy. Metal-free P-containing anti-wear additives (MFPAWs) have been used for many years in other automotive and industrial lubricants. We examined the effect of an MFPAW in catalyst efficiency and fuel economy engine tests. Catalyst protection and the fuel economy benefits of engine oils were improved when the MFPAW was used in place of ZDP. Therefore, the total P content of an engine oil does not need to be reduced if the proper anti-wear additive is selected.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Effect of metal-free phosphorus anti-wear compounds on passenger car emissions and fuel economy


    Beteiligte:
    Devlin, Mark T. (Autor:in) / Guevremont, Jeffrey (Autor:in) / Sheets, Roger (Autor:in) / Loper, John (Autor:in) / Guinther, Greg (Autor:in) / Thompson, Karen (Autor:in) / Jao, Tze-Chi (Autor:in)

    Erschienen in:

    Lubrication Science ; 20 , 2 ; 151-161


    Erscheinungsdatum :

    2008


    Format / Umfang :

    11 Seiten, 2 Bilder, 8 Tabellen, 33 Quellen




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch




    General Motors' Steam-Powered Passenger Cars - Emissions, Fuel Economy and Performance

    Mondt, J. R. / Vickers, P. T. / Haverdink, W. H. et al. | SAE Technical Papers | 1970


    Fuel economy trends in passenger car fleets Effects of emissions controls

    Gray,D.S. / Freeman,J.H. / Keller,J.L. et al. | Kraftfahrwesen | 1979


    Fuel Economy Trends in Passenger Car Fleets - Effects of Emissions Controls

    Gray, D. S. / Freeman, J. H. / Keller, J. L. et al. | SAE Technical Papers | 1979


    US Passenger Car Fuel economy

    Simpson,B.M. / Ford Motor,US | Kraftfahrwesen | 1984


    The interaction between exhaust emissions and fuel economy for passenger car engines

    French,C.C. / Such,C.H. / Ricardo Consulting,GB | Kraftfahrwesen | 1990