This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Effect of Lubricant Viscosity and Friction Modifier on Reciprocating Tests
Technical Paper
2013-36-0155
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Five automotive oils, with different viscosity grades, were tested under different loads and speeds in a reciprocating test using piston rings and cylinder liners. Starved and fully-flooded conditions were also considered in order to analyze the influence of lubricant supplier in the lubrication regimes, especially in boundary-mixed transition. The expected Stribeck curve behavior was observed, and more interesting visualization appeared when the viscosity value was extracted from the Stribeck abscissa axis. The higher viscosity oils showed lower friction coefficient at low speed/load ratios. Such behavior is usually neglected and may be significant to understand the triblogical behaviour of engineering components. Computer simulation showed similar results, including the “cross-over” speed/load when the lower viscosity oils start to show lower friction.
Recommended Content
Authors
Topic
Citation
Profito, F., Tomanik, E., Lastres, L., and Zachariadis, D., "Effect of Lubricant Viscosity and Friction Modifier on Reciprocating Tests," SAE Technical Paper 2013-36-0155, 2013, https://doi.org/10.4271/2013-36-0155.Also In
References
- Bartz , W. Fuel Economy Improvement by Engine and Gear Oils Tribology for Energy Conservation 1998 Elsevier 13 24
- Cater , M. ; Bolander , N. ; Sadeghi , F. A Novel Suspended Liner Test Apparatus for Friction and Side Force Measurement with Corresponding Modeling SAE Technical paper 2006-32-0041 2006
- Hamrock , B.J. , Schmid , S.R. , Jacobson , B.O. Fundamentals of Fluid Film Lubrication 2 nd Marcel Dekker Inc. 2004
- Hoshino , K. ; Kawai , H. ; Akiyama , K. Fuel Efficiency of SAE 5W-20 Friction Modified Engine Oil SAE Technical paper 982506 1998
- Liao , K. , Liu , Y. , Kim , D. , Urzua , P. , Tian , T. Practical challenges in determining piston ring friction Proc. IMechE Part J: J Engineering Tribology 227 2 112 125
- Profito , F.J. , Zachariadis , D.C. , Tomanik , E. One Dimensional Mixed Lubrication Regime Model for Textured Piston Rings Proceedings of 21 st Brazilian Congress of Mechanical Engineering 2011 COBEM 2011
- Taylor , R.I. et al. Lubricants & Energy: Life-Cycle Analysis Life Cycle Tribology 2005 Elsevier 565 572
- Tomanik , E. ; Lastres , L. ; Carvalho , L. Evaluation of an Experimental Lube Oil On Piston Friction, Engine Performance and Vehicle Acceleration 1 st Tribo BR 2010
- Tomanik , E. Friction and Wear Bench Tests of Different Engine Liner Surface Finishes Tribology International 41 1032 1038 2008
- Tomanik E. , Profito , F.J. , Zachariadis , D.C. Modelling the hydrodynamic support of cylinder bore and piston rings with laser textured surface Tribology International 59 90 96 2013
- Tseregounis , S. ; McMillan , M. ; Olree , R. Engine Oil Effects on Fuel Economy in GM Vehicles - Separation of Viscosity and Friction Modifier Effects SAE technical paper 982502 1998