This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Transmission Oil Aging – Passenger Car Manual Gearbox Applications (Part Two – Accelerated Testing and Field Performance)
Technical Paper
2009-01-2633
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
An accelerated test methodology has been developed to reproduce long-term aging of Automotive Gearbox Lubricants. This test is essentially an anaerobic thermal stress test adapted from standard oxidation tests, except that nitrogen is bubbled through the oil instead of air or oxygen.
This test produces significant viscosity increase and heavy deposit formation with lubricants known to create similar problems in the field. However oils that remain stable in the field, that is do not increase in viscosity and do not lead to deposit formation also show no viscosity increase in this test. These fluids do show an increase in acid number and additive reactions/transformations that can be observed by 31P NMR.
Comparison with oxidation test results show that the nitrogen aging test gives closer results to known field performance.
Recommended Content
Technical Paper | Factors influencing Lubricant Performance in the Sequence VE Test |
Technical Paper | TBN Retention - Are We Missing the Point? |
Technical Paper | Development of Ultra Low Viscosity 0W-8 Engine Oil |
Authors
Citation
Bouffet, A. and Abellaneda, G., "Transmission Oil Aging – Passenger Car Manual Gearbox Applications (Part Two – Accelerated Testing and Field Performance)," SAE Technical Paper 2009-01-2633, 2009, https://doi.org/10.4271/2009-01-2633.Also In
References
- Axle Oil A Ageing Fresh Look at an Old Problem (Part One Simplified Approach to Modeling) BOUFFET Alain SAE Document Number: 2008-01-2394 October 2008
- Universal Driveline Fluid Schwind, J.J. Lubrizol, 20/06/1994
- Lubricant Composition Walters, D.K. Ethyl Petroleum Additives 27/11 1996
- Standard Test Method for Evaluation of the Thermal and Oxidative Stability of Lubricating Oils Used for Manual Transmissions and Final Drive Axles
- ISOT Indiana Stirring Oxidation Test
- [Oxidation Stability of Lubricating Oils used in Automotive Transmissions by Artificial Aging
- Oxydation stability of lubricating oils by artificial Aging
- Sulphur-phosphous components in gear oils - part 1, oxidation stability studies by 31 P-NMR spectroscopic techniques Bansal V. Dohhen K.C. Sarin R. Sarpal A.S.1 Bhatnagar A.K. Tribology International 35 12 December 2002 819 828 10
- Using Nuclear Magnetic Resonance to Track Additive Depletion Barnes, Mark Wooton, Dave http://www.noria.com/learning_center/category_article.asp?articleid=764&relatedbookgroup=OilAnalysis
- Etude par RMN des Dithiophosphates de Zinc en tant qu’additifs antiusure dans une huile moteur Joëlle GAZERIAN Thèse – Université d’Aix-Marseille III 4th may 1984
- Reactivity of Triphenyl Phosphorothionate in Lubricant Oil Solution Tribol Lett 2009 35 31 43 Mangolini, Filippo Antonella ROSSI Spencer Nicholas D.
- Standard Test Method for Acid Number of Petroleum Products by Potentiometric Titration
- Standard Test Method for Determination of the Oxidation of Used Lubricants by FT-IR Using Peak Area Increase Calculation
- http://en.wikipedia.org/wiki/Arrhenius_equation