ANALYTICAL AND EXPERIMENTAL STUDIES OF TRACTION DRIVES FOR AUTOMOTIVE APPLICATION

摘要

Mechanical Efficiency of toroidal traction drives is the key parameter for transmission rnengineers worldwide to accept their use in continuously variable transmissions. In this rnwork, the traction drive efficiencies are investigated analytically as well as rnexperimentally as a function of speed, torque, speed ratio and temperature. The effect of rnclamping force on efficiency is also evaluated. In addition, slip at the traction contact is rnmeasured and compared with the prediction of the simulation model. In a stand-alone test rnrig, the drag torque associated with the power-roller thrust bearing is also measured.