In a typical CVT, You can find an input pulley which is connected to the motor crankshaft by way of a torque converter (or clutch pack) and an output pulley that sends energy into the wheels. A belt (or chain) connects the two pulleys, which often can change their diameters https://d-cvt19738.wizzardsblog.com/34299210/a-review-of-d-cvt