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Test Techniques for the Evaluation of Lubricant Effects on Axle Break-in Temperature - Investigation with an Integrally Built Rear Axle of a European Sedan
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Abstract
It has been recognized for many years that multipurpose axle lubricants give rise to much higher axle break-in temperatures than lead-soap, active-sulfur or sulfur-chlorine-lead lubricants. Evaluation of differences in axle lubricant break-in temperature between the various multipurpose gear lubricants has been complicated by lack of repeatability and reproducibility.
The work described in this paper shows that one of the most important variables affecting axle break-in temperature, under the conditions of the test technique used, was torsional axle preload and that control of dimensional preload in itself is not sufficient to ensure good test repeatability.
The test technique described here has been used to evaluate the axle lubricant break-in temperature properties of several sulfur-phosphorus multipurpose gear lubricants. The technique has been shown to be highly repeatable and reproducible when temperatures are compared at normalized variables of ambient temperature and torsional axle preload.
This paper is primarily limited to a study of the axle break-in temperature behavior of a Volvo sedan equipped with an integrally built rear axle, driven at or below the maximum weight limitation imposed by the manufacturer.
Citation
Holubec, Z. and Brandow, W., "Test Techniques for the Evaluation of Lubricant Effects on Axle Break-in Temperature - Investigation with an Integrally Built Rear Axle of a European Sedan," SAE Technical Paper 760327, 1976, https://doi.org/10.4271/760327.Also In
References
- McClintock, R. “Effect of Lubricants on Rear Axle Pinion Bearing Break-in.” ASLE Trans. 6 154 1963
- Cornish, Robert F. “A Critical Look at Tapered Roller Bearing Wear in Hypoid Axles.” SAE Paper 650440 1965
- McClintock, R. “Lubricant Effects on Rear Axle Tapered Roller Bearing Wear.” SAE Paper 690778 1969
- Lofgren, S. “Volvo High-Speed Testing of Rear Axles and Oils for Passenger Cars.” Institute of Petroleum Symposium ‘Performance Testing of Lubricants for Automotive Engines and Transmissions’ Montreux, Switzerland 2-6 April 1973
- Tektronix 31 Statistical Program Library 1 Curve Fitting - Power