Abstract
The Milner continuously variable transmission (MCVT) is a transmission based on rolling contacts analogue to those found in angular contact roller bearings. The MCVT is applicable to very high power density applications or those with demanding packaging constraints, due primarily to the existence of multiple traction contacts on each of the rolling elements. This paper details the latest developments of the MCVT both from an analytical modelling approach and describes ongoing experimental validation and real world testing. The paper will describe the development of a detailed dynamic simulation of the MCVT, including the modelling of contact mechanics and Elasto-hydrodynamics of the traction contacts. Means of optimising the MCVT geometry within design constraints will also be described and an example of the application of MCVT as an IVT in a non automotive environment will be explained. Future plans for the development of new variants of the MCVT will be highlighted.
Keywords: Continuous Variable Transmission, Infinitely Variable Transmission, Traction Drive, Elasto-hydrodynamics, Performance, Efficiency