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Rig and Road Tests Used in Development of Temperature Reduction Automotive Gear Oils
Technical Paper
2007-01-1983
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Modern light-duty trucks and SUV's are designed to be aerodynamic to increase fuel economy. Such vehicle design significantly reduces the amount of air available to cool the rear axle in rear wheel drive vehicles. Reduced cooling coupled with higher power output and additional load from trailer towing operations results in higher axle operating temperatures, especially during the early operation or “break-in” phase of axle life. Higher axle operating temperatures decrease oil viscosity resulting in reduced oil film formation ability to protect against wear and contact fatigue. High temperature also shortens the useful life of gear oils. To facilitate the development of gear oils capable of reducing axle operation temperature, we have developed a laboratory simulation test method that can closely simulate actual trailer-towing driving on Baker's grade road under maximum GVCWR of close to 6,033 kg (13,300 lbs). To make the simulation realistic, we chose test variables that influence axle operating temperatures and affect the life of key components such as gears, bearings, and seals. They include airflow over the axle, aerodynamic drag, towing payload, speed, torque, and road grade.
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Citation
Jao, T., DeGonia, D., Hewette, C., Koglin, C. et al., "Rig and Road Tests Used in Development of Temperature Reduction Automotive Gear Oils," SAE Technical Paper 2007-01-1983, 2007, https://doi.org/10.4271/2007-01-1983.Also In
References
- Heavenrich, R.M. EPA420-S-06-003 July 2006 “Light-Duty Automotive Technology and Fuel Economy Trends: 1975 through 2006.”
- Bala, V. McCombs Brandt, G. Proceedings of the 13 th International Colloquium Tribology Bartz W.J. January 15-17 2002 1145 152 “Effect of Rheological Properties on the Transient and Steady State Axle Efficiencies of Multigrade Gear Lubricants.”
- Vinci, J.N. Akucewich, E.S. Cain, R.W. Qureshi, F.S. SAE Paper No. 2002-01-1692 “Developing Next Generation Axle Fluids: Part II - Systematic Formulatiing Approach.”
- Vinci, J.N. Grisso, B.A. Schenkenberger, C. Qureshi, F.S. Gahagan, M.P. Hasegawa, H. SAE Paper No. 2004-01-3030 “Systematic Formulation of Efficient and Durable Axle Lubricants for Light Trucks and Sport Utility Vehicles.”
- Willermet, P.A. Dixon, L.G. SAE Paper No. 770835 “Fuel Economy - Contribution of the Rear Axle Lubricant.”
- O'Connor, B.M. Johnson, R.L. Schiemann, L.F. SAE Paper No. 811206 “The Relationship between Laboratory Axle Efficiency and Vehicle Fuel Consumption.”
- Bala, V. Brandt, G. Walters, D.K. Ind. Lubr. Trib. 52 4 2000 165 173 “Fuel Economy of Multigrade Gear Lubricants.”
- Bala, V. Guildry, K.L. Kuhlman, R.E. NLGI Annual Meeting Paper No. 0016 October 2000 “Fuel Economy Considerations of Multigrade Automotive Gear Lubricants.”
- Bala, V. Rollin, A.J. Brandt, G. SAE Paper No. 2000-01-2051 “Rheological Properties Affecting the Fuel Economy of Multigrade Automotive Gear Lubricants.”
- Akucewich, E.S. Vinci, J.N. Qureshi, F.S. Cain, R.W. SAE Paper No. 2002-01-1691 “Developing Next Generation Axle Fluids: Part I - Test Methodology to Measure Durability and Temperature Reduction Properties of Axle Gear Oils.”
- Akucewich, E.S. O'Connor, B.M. Vinci, J.N. Schenkenberger, C. SAE Paper No. 2003-01-3235 “Developing Next Generation Axle Fluids, Part III: Laboratory CAFÉ Simulation Test as a Key Fluid Development Tool.’
- Baker, M.R. Grisso, B.A. Rhoads, G. Schenkenberger, C. Qureshi, F.S. Gelder, A. SAE Paper No. 2005-01-3860 “Breaking the Viscosity Paradigm: Formulating Approaches for Optimizing Efficiency and Vehicle Life.”
- Baker, M.R. Schenkenberger, C. Rhoads, G. Grisso, B.A. SAE Paper No. 2006-01-3272 “Breaking the Viscosity Paradigm: Formulating Approaches for Optimizing Efficiency and Axle Life - Part II.”
- O'Connor, B.M. Vinci, J.N. Akucewich, E.S. Qureshi, F.S. Proceedings of the 13 th International Colloquium Tribology Bartz W.J. January 15-17 2002 1153 1166 “Optimizing Lubricants for Axle Durability and Efficiency.”
- Wincierz, C. Schweder, R. Kreutzer, I. Neveu, C. SAE Paper No. 2000-01-2029 “Influence of VI Improvers on the Operating Temperature of Multi-Grade Gear Oils.”
- Wincierz, C. Hedrich, K. Proceedings of 13 th International Colloquium Tribology Bartz W.J. January 15-17 2002 “Influence of Viscosity Index Improvers in Lubricants on the Mechanical Efficiency and Operating Temperature of Transmissions.”
- Wienecke, D. Bartz, W.J. SAE Paper No. 2002-01-1693 “Influence of Gear Oil Formulation on Oil Temperature.”
- O'Connor, B.M. Schenkenberger, C. SAE Paper No. 2005-01-3893 “The Effect of Heavy Loads on Light Duty Vehicle Axle Operating Temperature.”
- Devlin, M.T. Senn, J. Turner, T.L. Milner, J. Jao, T.C. 2004 “Reduction in Axle Oil Operating Temperatures by Fluids with Optimized Torque Transfer Efficiencies” Lubr. Sci. 18 7 23 2006
- Devlin, M.T. Senn, J. Sturtz, M. Bala, V. Milner, J. Jao, T.C. 2003 SAE Paper No. 2003-01-1972 Improved Understanding of Axle Oil Rheology Effects on Torque Transfer Efficiency and Axle Oil Operating Temperature