トラクションドライブ式無段変速機に関する研究　ＩＩ　　変速特性

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  • Power transmission of a cone roller toroidal traction drive. (2nd Report, Side slip and speed ratio change).

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A traction drive CVT of toroidal rolling elements changes its speed ratio by the control of the attitude angle of the power roller of which control force is induced from a little side slip. In this paper, geometric contact points and the side slip velocity are found by vector analysis, and both the traction force and the side slip force which swings the power roller are calculated by the thermal EHL theory using the elastoplasic traction fluid model. The calculated results are compared to the experiments of the prototype of the torque transmission capacity of 140 Nm. It is concluded the necessary and sufficient percentage of the side slip velocity should be designed to be no more than 2 %.

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