Fuzzy controller applied to electric vehicles with continuously variable transmission

This paper proposes an energy efficiency control strategy for electric vehicles (EV) equipped with continuously variable transmission (CVT). The strategy is based on a fuzzy controller that acts directly on the ratio of the CVT system, and uses the maximum efficiency motor rotation speed as a reference. Different to earlier proposals, this project involved the development of a more precise system that optimizes the maximum efficiency function of the PMDC motor for use as a reference for the controller. A full characterization of the system is provided, together with the results of simulation modeling employing different types of routes taken by the vehicle.