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Exact Measurement of Power Loss in Automotive Transmission and Axle for Fuel Economy
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English
Abstract
Many problems have been encountered in attempting to clarify the behaviors of drivetrain components from the standpoint of the power loss. This paper describes the analytical and experimental research to develop a method of measuring the total power losses of transmission and axle whereby far more accurate test results can be obtained than by the conventional means with good repeatability. In this pursuit, the power loss of the drivetrain is divided into two groups, i.e. gear tooth friction loss and lubricant churning loss, with the resulting practical formulation which permits calculation of these two losses on a separate basis. Also covered are the results so far achieved by means of practical application of the above approach and concept in both bench and field testings aiming at improvement of fuel economy and prediction of the drivetrain lubricant temperatures in the field operation.
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Citation
Katoh, H., Inoh, T., and Umezawa, K., "Exact Measurement of Power Loss in Automotive Transmission and Axle for Fuel Economy," SAE Technical Paper 830573, 1983, https://doi.org/10.4271/830573.Also In
References
- Willermet, P. A. “Fuel Economy-Contribution of the Rear Axle Lubricant.” SAE PAPER 770835 September 26–30 1977
- Hobson, D. E. “Axle Efficiency - Test Procedures and Results.” SAE PAPER 790744 1979
- Yada, T. “Measuring Methods of Gear Meshing Loss.” JSME 19 No. 1 1973 19 26
- Anderson, N. E. “Effect of Geometry and Operation Conditions on Spur Gear System Power Loss” ASME
- Umezawa, K. Inoh, T. Katoh, H. “International Symposium on gearing & Power Transmission” 1981