INFINITELY VARIABLE SPEED TRANSMISSION

HASSAN ZOHOOR, Purdue University

Abstract

The infinitely variable speed transmission consists of four similar sets of a mechanism, although any number of the sets of a mechanism can be used in the system. Any set contains of a six-bar mechanism. The lengths of the links were selected by an optimization technique. The input angular velocity of the system is assumed constant, while the output angular velocity is a function of the position of a shift lever. The shift lever is attached to the fixed pivot of the output linkage of the first four-bar. The lengths of the linkage are optimized such that minimum variations in output angular velocity for a range of stepless change of speed ratio is obtained. In order to verify the analysis of the system, a prototype was made and the output velocity curves of the system for different values of speed ratios were obtained experimentally. The experimental results compare favorably with theoretical results.

Degree

Ph.D.

Subject Area

Mechanical engineering

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