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Tribological Behavior of Low Viscosity Lubricants in the Piston to Bore Zone of a Modern Spark Ignition Engine
Technical Paper
2014-01-2859
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Most major regional automotive markets have stringent legislative targets for vehicle greenhouse gas emissions or fuel economy enforced by fiscal penalties. Large improvements in vehicle efficiency on mandated test cycles have already taken place in some markets through the widespread adoption of technologies such as downsizing or dieselization. There is now increased focus on approaches which give smaller but significant incremental efficiency benefits such as reducing parasitic losses due to engine friction. Fuel economy improvements which achieve this through the development of advanced engine lubricants are very attractive to vehicle manufacturers due to their favorable cost-benefit ratio.
For an engine with components which operate predominantly in the hydrodynamic lubrication regime, the most significant lubricant parameter which can be changed to improve the tribological performance of the system is the lubricant viscosity. Low viscosity lubricants are increasingly being specified by vehicle manufacturers who are now more frequently working directly with the lubricant supplier to design fluids specific to their requirements. As lubricant viscosity grades far below those currently in the market are investigated it is vital that the detailed operating environment of the oil within specific engine components is properly understood. Losses in the piston / cylinder bore zone account for the largest portion of the overall engine friction. This paper investigates the tribological contact in this zone using advanced analytical techniques to predict the performance of two low viscosity lubricants. The relative contributions of hydrodynamic and boundary friction are resolved and the accuracy of the simulation is compared against motored engine test results.
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Citation
Taylor, O., Pearson, R., Stone, R., Carden, P. et al., "Tribological Behavior of Low Viscosity Lubricants in the Piston to Bore Zone of a Modern Spark Ignition Engine," SAE Technical Paper 2014-01-2859, 2014, https://doi.org/10.4271/2014-01-2859.Also In
References
- King , J. The King review of low-carbon cars, Part I: the potential for CO2 reduction HM Treasury 2007 45
- Ernst , C. S. CO2 Reduction potentials for passenger cars until 2020 Management Summary 113510 Institute fur Kraftfahrzeuge Aachen December 2012 www.bmwi.de/Publikationen 22 March 2014
- Davison , E. and Haviland , M. , Lubricant Viscosity Effects on Passenger Car Fuel Economy SAE Technical Paper 750675 1975 10.4271/750675
- Tanaka , H. , Nagashima , T. , Sato , T. , and Kawauchi , S. , The Effect of 0W-20 Low Viscosity Engine Oil on Fuel Economy SAE Technical Paper 1999-01-3468 1999 10.4271/1999-01-3468
- Manni , M. and Florio , S. , An Experimental Evaluation of the Impact of Ultra Low Viscosity Engine Oils on Fuel Economy and CO 2 Emissions SAE Technical Paper 2013-01-2566 2013 10.4271/2013-01-2566
- Tamoto , Y. , Kido , M. , and Murata , H. , Possibilities of Ultra Low Viscosity Fuel Saving Gasoline Engine Oil SAE Technical Paper 2004-01-1936 2004 10.4271/2004-01-1936
- Zuidema , H. H. The performance of lubricating oils Second Reinhold publishing corporation
- http://www.oats-lrc.co.uk/innovation-news/article-871/ford-reveals-new-ecoboost-lubes-spec 22 March 2014
- Covitch , M. , Brown , M. , May , C. , Selby , T. et al. Extending SAE J300 to Viscosity Grades below SAE 20 SAE Int. J. Fuels Lubr. 3 2 1030 1040 2010 10.4271/2010-01-2286
- Maassen , F.J. Dohmen , J. Pischinger , S. and Schwaderlapp , M. Engine friction reduction - design measures for reduced fuel consumption MTZ July-August 2005
- Richardson D. E. Review of power cylinder friction for diesel engines ASME Paper No. 99-ICE-196, Spring technical conference 1999
- ACEA European Oil Sequences 2012 www.acea.be
- Engine Oil Licensing and Certification System API 1509 Seventeenth September 2012 www.api.org
- Devlin , M. , Lam , W. , and McDonnell , T. , Critical Oil Physical Properties that Control the Fuel Economy Performance of General Motors Vehicles SAE Technical Paper 982503 1998 10.4271/982503
- Moore , A. , Influences of Lubricant Properties on ASTM Sequence VI and Sequence VI-A Fuel Efficiency Performance SAE Technical Paper 961138 1996 10.4271/961138
- Gangopadhyay , A. , Sorab , J. , Willermet , P. , Schriewer , K. et al. Prediction of ASTM Sequence VI and VIA Fuel Economy Based on Laboratory Bench Tests SAE Technical Paper 961140 1996 10.4271/961140
- Styer , J. and Guinther , G. , Fuel Economy Beyond ILSAC GF-5: Correlation of Modern Engine Oil Tests to Real World Performance SAE Int. J. Fuels Lubr. 5 3 1025 1033 2012 10.4271/2012-01-1618
- Setting emission performance standards for new passenger cars as part of the Community's integrated approach to reduce CO2 emissions from light-duty vehicles' Regulation (EC) 443/2009 of the European Parliament and of the Council 23rd April 2009
- E/ECE/324/Rev.1/Add.82/Rev.4 6.3.1. Available at www.unece.org
- Zuidema , H. H. The performance of lubricating oils Second Reinhold publishing corporation 1959 32
- SAE International Surface Vehicle Standard Engine Oil Viscosity Classification SAE Standard J300 March 2013
- Gulwadi , S.D. Analysis of tribological performance of a piston ring pack Tribology Transactions 43 2 January 2000 151 162
- Perchanok , M. , Modeling of Piston-Cylinder Lubrication with a Flexible Skirt and Cylinder Wall SAE Technical Paper 2000-01-2804 2000 10.4271/2000-01-2804
- Duyar , M. , Bell , D. , and Perchanok , M. , A Comprehensive Piston Skirt Lubrication Model Using a Mass Conserving EHL Algorithm SAE Technical Paper 2005-01-1640 2005 10.4271/2005-01-1640
- Carden , P. , Bell , D. , Priest , M. , and Barrell , D. , Piston Assembly Friction Losses: Comparison of Measured and Predicted Data SAE Technical Paper 2006-01-0426 2006 10.4271/2006-01-0426
- Greenwood , J.A. , Tripp , J.H. The contact of two nominally flat rough surfaces Proceedings of IMechE 185 625 633 1970
- Xin , Q. Diesel engine system design Woodhead Publishing Limited Cambridge, UK May 2011
- Ogawa , T. , Suzuki , T. , Ezaki , S. , Suzuki , T. et al. Reduction of Friction Losses in Crankcase at High Engine Speeds SAE Technical Paper 2006-01-3350 2006 10.4271/2006-01-3350
- Calabretta , M. , Cacciatore , D. , and Carden , P. , Valvetrain Friction - Modeling, Analysis and Measurement of a High Performance Engine Valvetrain System SAE Int. J. Engines 3 2 72 84 2010 10.4271/2010-01-1492
- Jackson R. , Green I. On the Modelling of Elastic Contact between Rough Surfaces Tribology Transactions 54 2011
- Tomanik E. Modelling the hydrodynamic support of cylinder bore and piston rings with laser textured surfaces Tribology International March 2013
- Private communication with the SAE J300 steering committee