1980-06-01

Disc Brake Linings-Analytical Study and Selection Criteria 800782

With the advances in automotive brake technology, an increasing attention is being focused on the singularly important element in the brake system - the linings. More and more time and money are being invested in the research and development of the friction materials. Hydraulic brake system regulations, the U. S. Federal Motor Vehicle Safety Standard 105–75, and the European Economic Community Directive 71/320/EEC with its respective amendments have become effective since 1976 model year passenger cars. All these factors have contributed toward continuing studies and development in the disc brake linings.
This paper highlights some of the most important characteristics of a friction material in general, and in a disc brake application in particular. Further, it shows how the topic of friction material properties be approached by an individual involved in design, development, testing, or marketing of the brake linings. Based upon the author’s first-hand experience in this field, a “Friction Material Analysis Chart” has been developed, which summarizes the salient features associated with brake linings. From a practical standpoint, this chart (appended to the paper at its end) would be a valuable tool in the analysis and selection of a friction material for a brake application.

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