ELECTRONIC CONTINUOUS VARIABLE TRANSMISSION

Abstract

The goal of the project is to design and build a prototype of an “Electronic Continuously Variable Transmission” (E-CVT) as a replacement for the current mechanical CVT on the Baja SAE race vehicle. The Baja race car’s mechanical CVT had two major issues that served as the primary reasons for undertaking this project. The first issue was the tedious and error-prone process of tuning the CVT. The second issue was the mechanical CVT not being properly sealed which put the components inside at a risk of damage from dirt and water. The E-CVT design consists of two pulleys connecting the engine and gearbox that change their diameter based on data collected from the engine. By using electric motors in conjunction with sensors and microcontrollers, the E-CVT algorithmically changes the gear ratio between the engine and gearbox. The E-CVT's insulated wiring and protective casing at IP54 certification level ensures its protection from water and dirt in the off-road racing environment. The new system offers greater adjustability and increased reliability.