因此，要提高产品的性能，应优化总体方案，协调性能参数，并提高传动系效率。
So, in order to improve the production performance, it should optimize collectivity scheme, correspond performance parameter and improve power train efficient.
经济性就是传动系本身的功率损失要小，即效率要高。
Economic is that power losing of the transmission system should be small, namely efficiency should be high.
本文应用转化机构的基本概念分析了封闭式差动轮系，多自由度轮系和多重轮系的传动比、力矩和效率。
Based on the basic concept of transformed mechanism, transmission ratio, moment and efficiency of closed differential train, multiple freedom train and multiple train are analysed in this thesis.
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