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原文传递 Performance Based Brake Testers (PBBT). Round Robin Final Report; Rept. for Jul 27-29 98

题名：	Performance Based Brake Testers (PBBT). Round Robin Final Report; Rept. for Jul 27-29 98
作者：	Shaffer, S. J.; Christiaen, A. C.
关键词：	Brake tests; Braking; Commercial vehicles; Brakes(Motion arrestors); Braking forces; Brake performance; Evaluation; Deceleration; Roller dynamometer; Torquemeters; Traffic safety; Regulations; Trucks; Wheel contact loads; Recommendations; Test facilities
摘要：	This report documents the results of a series of tests in which several different types of performance-based brake testers (PBBTs) were compare side-by-side (i.e. a round robin test) in their ability to accurately measure brake forces (BFs) and wheel loads (WLs) of commercial vehicles (CVs), and to then predict the vehicle deceleration capability for a 32.2. km/hr on-road stopping test. The PBBTs consisted of five roller dynamometers (RD), two flat plate (FP) testers, and one breakaway torque tester (BTT). A PBBT that can also meet a set of functional specifications could be used for law enforcement by safety inspectors once performance-based criteria are codified. In the test program, specific ratios of BF to WL were imposed on both a 5-axle combination tractor semi-trailer and a two-axle straight truck, in both the fully laden and unladen conditions. In each loading condition, the overall vehicle braking capability was set to achieve a proposed minimum requirement of 0.4g, where g is the acceleration due to gravity.
总页数：	140p
报告类型：	科技报告