This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Influence of Pad Surface Texture on Disc Brake Squeal
Technical Paper
2011-01-2354
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
The prevention of brake squeal is a significant task in brake development, because brake squeal is bothersome to users and consequently reduces a vehicle's commercial value. Due to the progress made by researchers in their efforts to gain insight into the mechanisms and causes of brake squeal, the number of brake squeal complaints has declined. However, brake squeal can appear long after the vehicle is produced, without any early sign. In order to maintain long-term high satisfaction among the vehicle owners, it is important to find the factors that create a gradual increase in the occurrence of brake squeal. In this study, we focus on the stiffness factor of brake pads. Also, brake-pad wear due to braking is virtually impossible to completely eliminate. Here, we examine the correlation between pad stiffness and squeal occurrence.
This study presents experimental and analytical results of the influence of pad surface texture on disc brake squeal. Pads with different surface texture were prepared by changing the sliding distances. Surface texture measurements were taken under various thrust pressure conditions using an ultrasonic measuring device. In addition to measuring the pad stiffness, we evaluated the results by pad excitation at frequencies and vibration amplitudes that would cause brake squealing. The results showed that stiffness increased as the surface texture became smoother. Namely, the pad surface texture affected the pad stiffness. Finally, we used a numerical model to analyze the mechanism behind the generation of brake squeal caused by pad surface texture. Our analytical results showed that the squeal frequency increased along with the increase in pad stiffness.
Recommended Content
Authors
Topic
Citation
Kosaka, K., Nishizawa, Y., Kurita, Y., and Oura, Y., "Influence of Pad Surface Texture on Disc Brake Squeal," SAE Technical Paper 2011-01-2354, 2011, https://doi.org/10.4271/2011-01-2354.Also In
References
- Earles, S. W. E. “A Mechanism of Disc Brake Squeal,” SAE Technical Paper 770181 1977 10.4271/770181
- Millner, N. “An Analysis of Disc Brake Squeal,” SAE Technical Paper 780332 1978 10.4271/780332
- Nishizawa, Y. Wakamatsu, S. Yanagida, H. Takahara, Y. “Study of Dynamic Pad Stiffness Influencing Brake Squeal,” SAE Technical Paper 2007-01-3956 2007 10.4271/2007-01-3956
- Oura, Y. Kurita, Y. Matsuura, Y. Nishizawa, Y. “Influence of Distributed Stiffness in Contact Surface on Disk Break Squeal,” SAE Technical Paper 2008-01-2584 2008 10.4271/2008-01-2584
- Rhee, S. K. Jacko, M. G. Tsang, P. H. S. “The Role of Friction Film in Friction, Wear and Noise of Automotive Brakes,” SAE Technical Paper 900004 1990 10.4271/900004
- Biwa, S. Hirakawa, S. Matsumoto, E. Stiffness evaluation of contacting surfaces by bulk and interface waves Ultrasonics 47 123 129 2007
- Sherif, H.A. Investiogation on effect of surface topography of pad/disc assembly on squeal generation Wear 257 687 695 2004