It is well known that vehicle fuel economy can be improved significantly by using oils of lower viscosity grades. More recently it has been shown that improvements in HDD (Heavy Duty Diesel) fuel economy can also be achieved by optimisation of the lubricant additive package, and that the appropriate selection of lubricant viscometrics and additive package can generate improvements in fuel economy without compromising wear performance. In this study, the impact of both lubricant viscometrics and additive type and treat on HDD fuel economy has been evaluated in a series of laboratory bench tests which measure friction under different lubrication regimes, and also in a full driveline rig. It will be shown that fuel economy improvements of up to 4 % can be achieved in a fired engine by moving from a 15W40 crankcase lubricant to an optimised 0W20. In addition, it will be shown that within a single viscosity grade, significant improvements in fuel economy can be achieved by tailoring the viscometrics and also by optimising the additive package. Finally, it will be shown that by using laboratory bench test data to model quantitatively the response in the fired engine, the relative importance of different lubrication regimes in determining overall HDD vehicle fuel economy can be estimated.
Modelling lubricant related fuel economy in heavy duty diesel engines
Simulation der schmierstoffbezogenen Kraftstoffeinsparung in Hochleistungs-Dieselmotoren
Tribological Research and Design for Engineering Systems, Leeds-Lyon Symposium on Tribology, 29 ; 491-500
Tribology Series ; 41
2003
10 Seiten, 15 Bilder, 4 Tabellen, 6 Quellen
Aufsatz (Konferenz)
Englisch
Dieselmotor , Hochleistung , Fahrzeugmotor , Kraftstoffeinsparung , Schmierstoff , Simulation , Oel , Viskositätsindex , Additiv , Viskometer , Optimierung , Laborversuch , Reibung , Messung , Kurbelgehäuse
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