中文摘要：

基于对橡胶带式无级变速器（CVT）基本结构和调速原理的分析，开发了一套对带式CVT调速特性、承载能力、传动效率等进行测试的试验台，主要实现对输入输出转矩和转速的测量以及对移动盘轴向位移的提取。在该试验台上对一款CVT样机在不同的速比、转速、负载下调速特性和传动效率的变化规律进行测试，测试结果验证了理论分析，得出不同工况下CVT调速特性和传动效率的变化规律，并根据试验结果给出了提高传动效率的途径。

英文摘要：

Basic structure and speed control principles of rubber V-belt continuously variable transmissions （CVT） are analyzed. A test bench on which the governing characteristics, carrying capacity, pulley diameters, and transmission efficiency of CVTs can be tested is developed. This test rig permits the measurement of speed, torque and axial displacements of moveable flanges. The experiment not only verifies the results of the theoretical analysis but also reveals the trend of governing characteristics and efficiency affected by the operating condition changes. These conditions include the speed ratio, rotational speed, and external load. Based on this investigation, a method for improving CVT efficiency is proposed. The feasibility of the test bench is demonstrated by the experiment, which has a guiding role for design and parameter matching of CVTs.