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原文传递 Determination of Tire Energy Dissipation Analysis and Recommended Practices.

题名：	Determination of Tire Energy Dissipation Analysis and Recommended Practices.
作者：	Thompson, G. D.; Burgeson, R. N.
关键词：	Energy dissipation devices, Recommended practices, Fuel Economy (FE), Power absorption, Environmental Protection Agency (EPA)
摘要：	The vehicle tire has a very significant effect on the fuel consumption of the vehicle. For example, during low speed operation the tire is the major source of external energy dissipation by the vehicle. Because of the large effects of the tires and because significant variations have been observed among tires, it is important that the vehicles used for EPA fuel economy be equipped with appropriate tires. As an initial step to insure test vehicles are equipped with appropriate tires, EPA issued Advisory Circular AC-55A to require tire information for those vehicles for which an alternate dynamometer power absorption was requested. This Advisory Circular stated that requiring such tire information, as type, size, manufacturer, sidewall cord materials, belt material, and the number of sidewall and belt plies was an interim approach until a standardized, acceptable test procedure for determining tire energy dissipation was available. The report analyses the currently available methods and test equipment for determining tire energy dissipation. It is concluded that a fully transient procedure is preferred, however such a procedure could not be conducted on equipment in current widespread use. It is however, feasible to conduct thermally transient measurements on free rolling tires with the prevailing equipment. Consequently, a Recommended Practice for the Determination of Tire Energy Dissipation -Quasi Steady State Procedure is provided as Appendix A of this report. In addition, a preferred, Recommended Practice for Determination of Tire Energy Dissipation - Transient Procedures is provided as Appendix B (not included).
报告类型：	科技报告