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An Experimental Study of Tire-Road Friction Coefficient by Transient Brake Time  

Han, Chang-Pyoung (두원공과대학)
Park, Kyoung-Suk (경희대학교 테크노공과대학)
Choi, Myung-Jin (경희대학교 테크노공과대학)
Lee, Jong-Sang (도로교통안전관리공단)
Shin, Un-Gyu (명지대학교 기계공학과)
Publication Information
Journal of the Korean Society for Precision Engineering / v.24, no.7, 2007 , pp. 106-111 More about this Journal
Abstract
In this paper, the transient brake time was studied on the van type vehicle with accelerometer. Experiments were carried out on the asphalt(new and polished), unpacked road(earth and gravel) and on wet or dry road conditions. The transient brake time is not effected bzy the vehicle speed. The transient brake time is about 0.41$\sim$0.43second on the asphalt road surface and the error range is within 0.1$\sim$0.16second. For the asphalt road condition, the transient brake time is not effected by both new asphalt road surface and the polished asphalt road surface. With compared by dry and wet road surface condition, the transient brake time of wet condition is longer than dry road condition and compared with unpacked road condition and packed road condition, unpacked road condition is shorter than packed road condition. It is considered that the transient brake time is effected by the road surface fraction coefficient. In other words, the transients brake time increases as friction coefficient decreases.
Keywords
Road condition; transient brake time; surface friction coefficient; Skid mark;
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  • Reference
1 Baker, J. S. and Fricke, L. B., 'The Traffic Accident Investigation Manual,' SAE 980822, pp. 17-27, 1986
2 Vericom Computers, 'VC2000PC Dynamometer and Braking Test Comptuter Owner's Manual,' pp. 78-85, 1998
3 Reed, W. S., 'A Comparison of Emergence Braking Characteristics of Passenger Cars,' SAE 880231, pp. 258-265, 1988
4 Warner, C. Y., Smith, G. C., James, M. B. and Germane, G. J., 'Friction Applications in Accident Reconstruction,' SAE 830612, pp. 12-19, 1983
5 Day, T. D. and Smith, J. R., 'Friction factors for motorcycles sliding on various surfaces,' SAE 840250, pp. 441-448, 1984
6 Fricke, L. B., 'Traffic Accident Reconstruction,' Northwestern University Traffic Institute, pp. 62-67, 1990