SEDL / STP / STP1031-EB / STP23359S

New-Generation Skid Testers for the 1990s

Wambold, JC
Professor, professor emeritus, and professor, The Pennsylvania State University, University Park, PA

Meyer, WE
Professor, professor emeritus, and professor, The Pennsylvania State University, University Park, PA

Henry, JJ
Professor, professor emeritus, and professor, The Pennsylvania State University, University Park, PA

Pages: 16    Published: Jan 1990

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Abstract

Economical friction testers are needed which will generate more useful data than current testers, especially with the abolishment of the 88-km/h speed limit and the increasing use by automakers of antilock braking systems. Three basic methods designs for testers, the ribbed/blank-tire, the spinup, and the spindown, are evaluated. It is found that the two-wheel ribbed/blank-tire method can be used by existing testers to provide the optimum amount of data without mechanical modifications. The test-wheel spinup method, which obtains the skid number/speed relationship, is recommended for newly built testers.