Study on the power transfer characteristic of 3K-type CVT

Abstract

In this research, it is the purpose to solve the power transfer characteristic of 3K-type CVT. As a concrete method, at first, the shear characteristic of traction fluid under high Hertz pressure is shown by a shear model of traction fluid in EHL contact area, and traction power is computed. Next, the torque transfer efficiency in each contact area and speed transfer efficiency are computed using the concept of a force pole, and the power transfer efficiency in each contact area is searched for by using these. And the theoretical power transfer efficiency of 3K type CVT is searched for by substituting this result for the efficiency formula of a planetary mechanism. Moreover, a calculation result is compared with an experiment result in order to investigate the usefulness of this analysis.