Abstract

A Continuous Variable Transmission is an unconventional type of transmission which transmits torque/power from the crankshaft of the engine to the wheels that run on the ground. It is a single speed step- less transmission with the help of pulleys and a belt to obtain uninterrupted and continuous infinite gear ratios within a finite limit. Infinite gear ratios are obtained by varying belt diameter over pulleys. Due to continuous contact between the belt and the pulley, the friction between both the surfaces leads to the generation of heat over a period of time. At higher speed, instances and clutch slippage situations produces more amount of heat in CVT components. Studies show that CVT surface temperatures may reach up as high as 800C to 1200C depending upon the various speeds of CVT, which affects the service life of components in long run and simultaneously its performance is reduced. So, necessary cooling is required to enhance the life of CVT. The main objective of this work is reducing the surface temperature from 800C to 600C in static condition around the pulleys of a CVT by increasing its surface area in the form of rectangular and cylindrical fins which is subjected to natural convection and by comparing the changes in temperature distribution and heat dissipated using both the fins. The temperature distribution is analyzsed for different models using steady -state thermal analysis tool in Ansys. The fin material used is aluminium alloy of 3003 grade for its feasibility of machining, welding, and comparatively higher thermal conductivity.

Authors and Affiliations