A Visual Experimental Noise Investigation of a Twin Calliper Disc Brake 2000-01-2771
A twin calliper brake system is investigated using the whole body visual technique of holographic interferometry. It is shown that the disc mode of vibration has a preferred position where a disc antinode is situated under one calliper and a disc node under the second calliper. The maximum angular space occupied by the pad antinode is, as predicted by the theoretical study of the disc/pad interface geometry, the angle subtended by the pad length. For a four-piston opposed calliper the minimum distance is slightly larger than the piston centers. There is evidence that the disc mode position, in relation to the two callipers, may be antinode/node, node/node or antinode/antinode. With these arrangements an accompanying revised theoretical study of the disc/pad interface geometry predicts two stable conditions are possible - if the callipers are positioned either at an angle between 125° to 130° or 165° to 175°. The smaller angle was not tested but the brake became quiet at angles greater than 166°. A brief study of the calliper modes and pad spring retainer is included in the holographic results.
Citation: Fieldhouse, J. and Beveridge, C., "A Visual Experimental Noise Investigation of a Twin Calliper Disc Brake," SAE Technical Paper 2000-01-2771, 2000, https://doi.org/10.4271/2000-01-2771. Download Citation
Author(s):
John D. Fieldhouse, Carl Beveridge
Affiliated:
The University of Huddersfield
Pages: 14
Event:
18th Annual Brake Colloquium And Engineering Display
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Proceedings of the 18th Annual Brake Colloquium & Engineering Display-P-358
Related Topics:
Braking systems
Pistons
Noise
Vibration
Springs
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