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利用结点功率法对封闭式差动无级变速器的传动效率进行了理论计算，并在封闭电功率流机械传动试验台上进行了试验，研究了这种无级变速器传动效率的变化规律及其影响因素，并讨论了提高其传动效率的途径。
The node power method was used to calculate the transmission efficiency of a closed differential continuously variable transmission. The experiment was carried out on a closed mechanical power flow mechanical transmission test rig. The variation of the transmission efficiency of the CVT and its influence were studied Factors, and discussed ways to improve its transmission efficiency.