RESEARCH PAPERS: Power Transmissions and Gearing Papers

On the Mechanical Efficiency of Differential Gearing

[+] Author and Article Information
D. Yu, N. Beachley

Department of Mechanical Engineering, University of Wisconsin, Madison, Wisc. 53706

J. Mech., Trans., and Automation 107(1), 61-67 (Mar 01, 1985) (7 pages) doi:10.1115/1.3258696 History: Received July 10, 1984; Online November 19, 2009


Although much work has been done on the efficiency of epicyclic gearing, emphasis has usually been given to the planetary that has only one degree of freedom. In this paper, a thorough study of the efficiency of differential gearing that has two degrees of freedom is presented. New analytical methods and programs are designed to calculate differential efficiencies and to plot useful curves. Examples are given for split-path differential, continuously variable transmissions (CVT) with input power coupling. It is pointed out that there are six different ways of using a given differential design in such a split-path CVT, providing the opportunity for full utilization of its potential. With the help of computer programming, optimum designs can be obtained.

Copyright © 1985 by ASME
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