This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
The Effect of Friction Modifiers and DI Package on Friction Reduction Potential of Next Generation Engine Oils: Part I Fresh Oils
Technical Paper
2018-01-0933
ISSN: 0148-7191, e-ISSN: 2688-3627
This content contains downloadable datasets
Annotation ability available
Sector:
Language:
English
Abstract
Friction reduction in lubricated components through engine oil formulations has been investigated in the present work. Three different DI packages in combination with one friction modifier were blended in SAE 5 W-20 and SAE 0 W-16 viscosity grades. The friction performance of these oils was compared with GF-5 SAE 5 W-20 oil. A motored cranktrain assembly has been used to evaluate these, in which friction mean effective pressure (FMEP) as a function of engine speeds at different lubricant temperatures is measured. Results show that the choice of DI package plays a significant role in friction reduction. Results obtained from the mini-traction machine (MTM2) provide detailed information on traction coefficient in boundary, mixed and elastohydrodynamic (EHD) lubrication regimes. It has been shown that the results from the cranktrain rig are fairly consistent with those found in MTM2 tests for all the lubricants tested. Analytical studies suggest that the traction coefficient increase in mixed lubrication regime is associated with the lubricant starvation due to the tribofilm formation. Oil film thicknesses have been measured as a function of rolling speeds at various temperatures using EHD2 rig. Analytical study indicated that the observed higher oil film thickness at low speeds and high temperatures can be explained by surface roughening or plastic deformation of the surface.
Recommended Content
Authors
Citation
Liu, Z., Gangopadhyay, A., Lam, W., and Devlin, M., "The Effect of Friction Modifiers and DI Package on Friction Reduction Potential of Next Generation Engine Oils: Part I Fresh Oils," SAE Technical Paper 2018-01-0933, 2018, https://doi.org/10.4271/2018-01-0933.Data Sets - Support Documents
| Title | Description | Download |
|---|---|---|
| Unnamed Dataset 1 | ||
| Unnamed Dataset 2 |
Also In
References
- Holmberg , K. , Andersson , P. , and Erdemir , A. Global Energy Consumption due to Friction in Passenger Cars Wear 47 221 234 2012
- Taylor , R.I. and Coy , R.C. Improved Fuel Efficiency by Lubricant Design: A Review Proc. Inst. Mech. Eng. 214J 1 15 2000
- Höglund , E. Influence of Lubricant Properties on Elastohydrodynamic Lubrication Wear 232 176 184 1999
- Spikes , H.A. The History and Mechanisms of ZDDP Tribol. Lett. 17 465 485 2004
- Miklozic , K.T. , Forbus , T.R. , and Spikes , H.A. Performance of Friction Modifiers on ZDDP-Generated Surfaces STLE Tribol. Trans. 50 328 335 2007
- Höglund , E. Influence of Lubricant Properties on Elastohydrodynamic Lubrication Wear 232 176 184 1999
- Hamrock , B.J. and Dowson , D. Isothermal Elastohydrodynamic Lubrication of Point Contacts: Part III Fully Flooded Results ASLE J. Lubr. Technol. 99 264 276 1977
- Johnson , K. L. , and Cameron , R. Shear Behaviour of EHD Films at High Rolling Contact Pressure Proc. Inst. Mech. Eng., Part 1 182 307 319 1967
- Bair , S. and Winer , W.O. Shear Strength Measurements of Lubricants at High Pressure ASLE J. Lubr. Technol. 101 251 257 1979
- Höglund , E. The Relationship between Lubricant Shear Strength and Chemical Composition of the Base Oil Wear 130 213 224 1989
- Johnson , K.L. and Tevaarwerk , J.L. Shear Behavior of Elastohydrodynamic Oil Film Proc. R. Soc. (London), Ser. A 356 1685 215 236 1977
- Komvopoulos , K. , Pernama , S.A. , Yamaguchi , E.S. , and Ryason , P.R. Friction Reduction and Antiwear Capacity of Engine Oil Blends Containing Zinc Dialkyl Dithiophosphate and Molybdenum-Complex Additives STLE Tribol. Trans. 49 151 165 2006
- Liu , Z. and Gangopadhyay , A. Friction Reduction in Lubricated Rough Contacts: Numerical and Experimental Studies ASME J Tribol. 138 021506-1 021506-12 2016
- Komvopoulos , K. , Saka , N. , and Suh , N.P. The Role of Hard Layers in Lubricated and Dry Sliding ASME J. Tribol. 109 223 231 1987
- Komvopoulos , K. , Saka , N. , and Suh , N.P. The Mechanism of Friction in Boundary Lubrication ASME J. Tribol. 107 452 462 1985
- Wolveridge , P.E. , Baglin , K.P. , and Archard , J.G. The Starved Lubrication of Cylinders in Line Contact Proc. Inst. Mech. Eng. 185 1159 1169 1971
- Faraon , I.C. and Schipper , D.J. Stribeck Curve for Starved Line Contacts ASME J. Tribol. 129 181 187 2007
- Glovnea , R.P. , Olver , A.V. , and Spikes , H.A. Lubrication of Rough Surfaces by a Boundary Film-Forming Viscosity Modifier Additive ASME J. Tribol. 127 223 229 2005
- Johnson , K.L. , Greenwood , J.A. , and Poon , S.Y. A Simple Theory of Asperity Contact in Elasto-Hydrodynamic Lubrication Wear 19 91 108 1972