CONTINUOUS VARIABLE TRANSMISSION

Automotive engineers are continuously researching new technology in the field of engine, transmission and suspension to improve fuel efficiency, power output and safety of automotive vehicles. Continuously Variable transmission (CVT) is one of the important steps towards it. CVT is an infinite gear system as it provides infinite gear ratio and it also helps in decreasing power loss. It helps in providing jerk free transmission, which can be observed in manual as well as in automatic gear transmission. There are different types of CVT available and one of the types is Pulley driven CVT. Primary aim of this project is to study various parameters like fly mass, drive pulley spring, driven pulley spring, cam angles and their effect on engagement rpm of CVT and also design manually operated model of CVT. As it is difficult to get the actual design specifications of CVT from the companies, some of the dimensions are assumed. The dimensions of other parts have been calculated based on the assumed dimensions. Experimentation is done on a Baja SAE vehicle which shows the effects of changing different parameters on engaging rpm of driven shaft. A static analysis as well as motion analysis is done on the CVT model.