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Eliminating Drum Brake Squeal by a Damped Iron Drum Assembly
Technical Paper
2007-01-0592
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Control of drum brake squeal is difficult to accomplish. After many trials guided by CAE and previous experience, for a passenger car it was felt that changing the metallurgical characteristics of the drum would lead to improved noise performance. The chemistry of the drum casting material was altered. The carbon equivalent was modified by increasing carbon and silicon content of the castings as well as changing the other materials. The integral hub and drum assembly was tested on two different dynamometers. The results were also verified by finite element complex eigenvalue analysis. Finally the solution was validated through vehicle level testing - Los Angeles City Traffic (LACT). For the structural consideration rotary fatigue was evaluated by CAE comparison followed by test rig confirmation. The higher carbon equivalent material drums successfully eliminated the annoying squeal in customer vehicles.
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Citation
Ganguly, S., Tong, H., Dudley, G., Connolly, F. et al., "Eliminating Drum Brake Squeal by a Damped Iron Drum Assembly," SAE Technical Paper 2007-01-0592, 2007, https://doi.org/10.4271/2007-01-0592.Also In
References
- Hulten Johan Flint John Nellemose Thomas ‘Mode shape of a squealing drum brake’ SAE Paper no. 972028
- James B. Malosh ‘Disc Brake Noise reduction through metallurgical control of rotor resonances’ SAE Paper no. 982236
- SAE J431- Automotive Grey iron castings.
- 1981 Iron castings Handbook Charles F. Walton Timothy J. Opar Published by iron castings Society, inc. Lib. Congress no. 81-82146
- Budinski K. G Engineering Materials- Properties and Selection Second Reston Publishing Co. Inc Reston, VA, 1983
- Kung S.W. Stelzer G. Smith K. A. ‘A study on low frequency drum brake squeal’ SAE 2004-01-2787
- Krishnapur K. Jim Luo ‘Brake Squeal rig and LACT Vehicle Test correlation improvements- Focus on thermal conditionings’ SAE 2004-01-2791