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Truck Disc Brakes-Practice Makes Perfect
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English
Abstract
A hydraulic front disc brake for heavy trucks was introduced in 1975 to meet federal motor vehicle safety standard 121 (FMVSS 121). This paper addresses the design parameters utilized in the development of the energy absorbing medium, namely, friction material and rotor surface.
Friction material characteristics in terms of temperature, speed and pressure sensitivity are studied. Truck geometry is studied along with friction materials to evaluate the combined effects on stopping distances, resulting in a quick reference method for predicting the 60 MPH stopping distance of any straight truck configuration.
Rotor thermal stress and interface durability characteristics are also discussed.
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Citation
Raves, P., "Truck Disc Brakes-Practice Makes Perfect," SAE Technical Paper 770667, 1977, https://doi.org/10.4271/770667.Also In
References
- Bueler R. C. Falk E. J. “A Practical Approach to the Selection and Sizing of Brakes to Meet FMVSS-121.” Paper 730198 SAE Automotive Engineering Congress Detroit January 1973
- Stokes S. L. “Heavy Truck Disc Brakes - Testing for Toughness.” Paper 740603 SAE West Coast Meeting Anaheim August 1974
- Birge W. T. Rinker K. H. “Disc Brakes Take on the Heavies.” Paper 740602 SAE West Coast Meeting Anaheim August 1974
- Murphy Ray W. Limpert Rudolf Segel Leonard “Development of Braking Performance Requirements For Buses, Trucks & Tractor Trailers” Paper 710046 S.A.E. Automotive Engineering Congress Detroit 1971