In an average CVT, there is an input pulley that may be connected to the engine crankshaft by way of a torque converter (or clutch pack) and an output pulley that sends power for the wheels. A belt (or chain) connects the two pulleys, which often can change their diameters https://devinrspke.ltfblog.com/33289920/the-smart-trick-of-d-cvt-that-nobody-is-discussing