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首页> 外文会议>Eighth International Conference on Urban Transport and the Environment in the 21st Century, null, Seville >Study on power transmitting efficiency of CVT using a dry hybrid V-belt
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Study on power transmitting efficiency of CVT using a dry hybrid V-belt

机译：用干式混合V型皮带研究CVT的动力传递效率

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摘要

This paper presents the net power transmitting efficiency of CVT using a newly developed dry hybrid V-belt. The efficiency was measured by using a devised testing machine, which eliminates other power losses due to peripherals such as shaft flanges. Torques on both pulleys were measured with high accuracy by using strain gauges which were glued on the cantilever shafts. The CVT efficiency is divided into three regions with respect to applied torque. At a low range of applied torque: region Ⅰ, the efficiency of CVT increases sharply with respect to the applied torque, because the bending loss is almost constant for applied torque but the torque increases the total transmitting power. At region Ⅱ (a middle range of applied torque), the efficiency is also constant with respect to transmitting torque since the relative energy loss due to belt bending decreases while the energy loss due to elastic slip increases with increasing the transmitting torque. They are equivalent with each other at this region. The efficiency sharply decreases at region Ⅲ due to the remarkably increasing of the slip. The transmitting efficiency increases with the low contraction force. The CVT shows the high transmitting efficiency at the speed ratio 1.0. The transmitting efficiency decreases when the CVT system has the misalignment, because the sharing deformation of the belt strand influences the transmitting efficiency as well as the bending deformation. The appropriate initial setting misalignment exists to reduce the influence of the misalignment. It is found that the relationship between the traction coefficient and the transmitting efficiency is independent on the contraction force, speed ratio and the misalignment. The traction coefficient could be a non-dimensional applied torque for characterizing the efficiency of the dry hybrid V-belt type CVT.
机译：本文介绍了使用新开发的干式混合三角皮带的无级变速器的净动力传输效率。效率是通过使用专门设计的测试机进行测量的，该测试机消除了由于外围设备（例如轴法兰）引起的其他功率损耗。通过使用粘贴在悬臂轴上的应变仪，可以高精度测量两个皮带轮上的扭矩。 CVT效率相对于施加的扭矩分为三个区域。在较低的施加转矩范围内：区域Ⅰ，CVT的效率相对于施加转矩急剧增加，这是因为弯曲转矩对于施加转矩几乎是恒定的，但是转矩会增加总的传递功率。在区域Ⅱ（施加扭矩的中间范围），效率相对于传递扭矩也是恒定的，这是因为皮带弯曲导致的相对能量损失减小，而弹性滑移引起的能量损失随着传递扭矩的增加而增加。它们在该区域彼此相等。由于滑移的明显增加，效率在Ⅲ区急剧下降。收缩力低，传输效率提高。 CVT在速度比为1.0时显示出很高的传输效率。当CVT系统不对准时，传输效率会降低，因为皮带束的共享变形会影响传输效率以及弯曲变形。存在适当的初始设置偏差，以减少偏差的影响。发现牵引系数与传递效率之间的关系与收缩力，速比和未对准无关。牵引系数可以是无量纲施加的扭矩，用于表征干式混合V带式CVT的效率。

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