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Measurements of Power Losses in Automobile Drive Train
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English
Abstract
Improving the automobile fuel economy, it is necessary to measure the power loss of the drive train with high accuracy.
The authors propose a new method for measuring the friction loss of automobile drive train.
This method is based on the measurement of temperature rise of lubricant due to the friction in a drive train, and allows us to separate the friction loss into the lubricant churning loss and the gear friction loss.
Applying the new method to a manual transmission and a rear axle, the friction loss of automobile drive train was measured with much higher accuracy, and effects of the gear ratio, input shaft speed, lubricant temperature, kinematic viscosity and differences of drive train on the friction loss have been revealed.
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Authors
Citation
Ko, Y. and Hosoi, K., "Measurements of Power Losses in Automobile Drive Train," SAE Technical Paper 840054, 1984, https://doi.org/10.4271/840054.Also In
References
- Ikemoto Yuji “Performance Advantages of Multigrade Manual Transmission Oil” SAE Paper 811207
- Willermet P. W. Dixon L. T. “Fuel Economy Contribution of the Rear Axle Lubricant” SAE Paper 770835
- Hobson D. E. “Axle Efficiency Test Procedure and Result” SAE Paper 790744
- Umezawa K. Inoh T. Katoh H. “Power Loss of Automotive Transmission with Exact Measurement of Total Heat Rejection” International Symposium on Gearing & Power Transmission 1981 Tokyo
- Yada T. “Accuracy of Oil Immersion Gear Loss Measuring Formula” Bulletin of the JSME 16 95 May 1973
- Yada T. “Relation of Friction Loss of Gear to Speed and Torque” Bulletin of the JSME 16 95 May 1973
- Metzen R. “Wind Energy - Heat Generation” 2nd International Symposium on Wind Energy System Oct. 1978