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This paper investigates the power split type differential planetary mechanism (SDM) that includes CVT and is possible to operate in high efficiency region. There are two regions indicating high efficiency in the coordinate, horizontal axis of which is ω1/ω3 and vertical axis ω2/ω3, where ω3 is angular velocity of input shaft of planetary system, ω1 and ω2 are velocities of other two shafts of it. The paper shows planetary mechanism possible to set operating point in the high efficiency region. Using CVT as an apparatus to realize operation in high efficiency region, SDM having high efficiency can be obtained.

Design method of high efficiency power split type differential planetary mechanism including CVT