Investigation of slip and speed ratio in axially displaceable cone variator CVT drive

Abstract

A CVT has a continuous range of transmission ratios that can up to device-dependent physical limits, be selected independently of the transmitted torque so it is an object of considerable research interest within the mechanical design community, driven primarily by the automotive industry's demands for more energy efficient and environmentally friendlier vehicles as the request for better energy efficiency and for CO2 and NOx reduction, imposed by environmental considerations, pushes many researchers to find new technical solution to improve the emission performance of nowadays IC engine vehicles. Also In case of machine tools applications optimum tool life only be obtained at particular speed ratio and the same cannot be achieved due fixed gear ratios and stepped pulley transmission. Moreover, unlike conventional stepped transmissions the CVT does not suffer from “shifting shock” and also we can achieve optimum speed range at which tool life will be maximum. In this paper investigation of slip and speed ratio of axially displaceable cone variator has been studied with the help of developed test rig and the results are relate with the IC Engine and machine tool application.