金属推型V带无级变速箱损耗机理仿真 部分3:带的滑动损失

Modelling of Loss Mechanisms In A Pushing Metal V-Belt Continuously Variable Transmission.Part 3: Belt Slip Losses

大家已经知道,以推型金属带为基件的无级变速箱(CVTs)的传动效率低于速比间断变化的变速器这种倾向是用CVT由于发动机/负荷匹配得到的燃油经济性的好处有被抵消的趋势。本论文组三篇论文详细地阐述了作为第一级得到的改进效率的带传动中损耗机理的研究。接上述两篇论文本文对由于带组和带的推块之间的相对运动以及带轮和带由于带轮变形的影响发生转矩损失进行模拟分析。本文还描述了附加的实验研究,测出了变速器内两带轮的切向滑动速度。推荐了附加的损耗模型,基于目前其他推荐的理论外,阐述了除论文1和论文2的讨论外的带滑动现象。通过转矩损耗和论文1和论文2中推荐的转矩一力分布的相互作用对比实验范围证实了本文进行的有关分析。本文考虑到其他研究中的新发现,改变目前金属V带的设计。

The power transmission efficiency of continuously variable transmissions （CVTs）based on the pushing metal belt is acknowledged to be lower than that of discrete ratio alternatives. This tends to negate the potential fuel economy benefits that are obtained by improved engine/load matching with a CVT. This series of three papers details an investigation into the loss mechanisms that occur within the belt drive as a first step to obtaining improvements in efficiency. This third paper follows on from two previous papers in which an analysis was performed modelling the torque losses that occur due to relative motion between the bands and segments of the belt, and between the pulleys and the belt due to pulley deflection effects. It describes additional experimental work, measuring the belt-slip speed tangentially about both of the pulleys in the variator. Additional loss models are proposed beyond those discussed in Parts 1 and 2 to describe the belt-slip phenomena, based on existing theory proposed by others. The analysis produced in this paper is validated against a range of experimental data and additionally through its close interaction with the torque-loss and torque-force distribution models proposed in Parts 1 and 2. The work takes into account new findings in other research and changes in the design of the current metal V-belt.