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Torque Characteristics of Commercial Vehicle Brakes
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English
Abstract
A new over-the-road brake dynamometer has recently been developed to measure commercial vehicle brake torque at nearly constant speed. In this paper, results are presented from the initial test program of this vehicle. The program included tests to assess the influence of initial drum temperature and rubbing velocity on brake torque, as well as the occurrence and nature of brake fade and hysteresis effects. Results of these tests indicated that the rate of energy flow into the brake system had a more significant effect on brake torque than initial temperature. Greater hysteresis was found in the S-Cam brakes than in the dual-wedge brakes.
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Authors
Citation
Post, T., Fancher, P., and Bernard, J., "Torque Characteristics of Commercial Vehicle Brakes," SAE Technical Paper 750210, 1975, https://doi.org/10.4271/750210.Also In
References
- Federal Motor Vehicle Safety Standards No. 121
- Ervin R. D. Fancher P. S. “Preliminary Measurement of Longitudinal Properties of Truck Tires.” Paper 741139 SAE National Truck Meeting Troy, Michigan November 1974
- Spencer A. R. Spurgeon W. M. Winge J. L. “Four Tests for Consistency of Automotive Brake Linings.” SAE Transactions 75 1966 paper 660412
- Federal Register November 14 1974 40169