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Characterising Lubricating Oil Viscosity to Describe Effects on Engine Friction
Technical Paper
2007-01-1984
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Oil formulation has been varied to modify oil viscosity characteristics; the effect on the rubbing friction losses of a 2.4litre diesel engine has been investigated for a range of temperatures from -20 to around 60°C. The aims of the study were first, to examine the extent to which viscosity alone determined the effect of formulation changes, and second, to define an effective viscosity to relate changes in viscosity due to formulation and temperature to changes in engine friction. This effective viscosity is based on cold cranking simulator measurements at -30°C, high temperature high shear viscosity at 150°C and kinematic viscosity measurements at three intermediate temperatures to define the variation with temperature. The effective viscosity has been described using a modified Vogel equation, which is presented.
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Citation
Shayler, P., Allen, A., Leong, D., Pegg, I. et al., "Characterising Lubricating Oil Viscosity to Describe Effects on Engine Friction," SAE Technical Paper 2007-01-1984, 2007, https://doi.org/10.4271/2007-01-1984.Also In
References
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