With a given rack parameter and required variable ratio transmission, variable ratio gear sector 3d model could be quickly obtained.

该方法不使用啮合方程，只需要确定齿条的参数及变速比运动规律，就可快速地得到变速比齿扇的三维数模。

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Five-speed automatics and six-speed manuals are common, and there's the new fuel-saving, infinitely variable transmission.

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The U.S.-market car endures the hurdy-gurdy droning of a continuously variable transmission (CVT).

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Given a free hand in the design, his team developed a continuously variable transmission system that allows the petrol engine and electric motor to work separately or in tandem.

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