Thermal State of Automotive Brakes after Braking on the Road and on the Roll-Stand 971040
The temperature influences significantly the braking effectiveness. The paper describes consistency criterions of the brake thermal state in road braking conditions and on the roll-stand. As a result of the vehicle motion simulation, the time histories of the heat fluxes generated on the friction surface of the front and rear disc were determined. They were used as an input data for the model of the heat transfer process in disc brakes. The problem was solved by the use of the finite element method. Time histories of temperatures on the friction surfaces and in the material of the disc were calculated. As a preliminary consistency criterion of the brake thermal state in road and roll-stand braking conditions, a balance of the energy cumulated in the brake rotor was assumed. As the most reliable consistency criterion an equality of average temperatures of the friction surface was assumed. The presented method allow to simulate on a roll-stand the thermal state of automotive brake which is observed during braking in road conditions. Basing on the method it is possible to calculate the test velocity, braking time and brake force.
Citation: Lozia, Z. and Wolff, A., "Thermal State of Automotive Brakes after Braking on the Road and on the Roll-Stand," SAE Technical Paper 971040, 1997, https://doi.org/10.4271/971040. Download Citation
Author(s):
Zbigniew Lozia, Andrzej Wolff
Affiliated:
Warsaw University of Technology
Pages: 11
Event:
SAE International Congress and Exposition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Overview of ABS/TCS and Brake Technology-SP-1229
Related Topics:
Brake discs
Disc brakes
Simulators
Heat transfer
Roads and highways
SAE MOBILUS
Subscribers can view annotate, and download all of SAE's content.
Learn More »