In a typical CVT, There's an input pulley that is connected to the engine crankshaft through 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 might alter their diameters to deliver an infinite amount https://dcvt16272.theideasblog.com/34851110/5-simple-statements-about-d-cvt-explained