As you may see from your cutaway from the D-CVT, there are added gears and a planetary gear established equipped towards the input and output shafts from the pulleys, that has a clutch pack to have interaction or disengage the latter. At better speeds, the D-CVT switches to separate mode, https://lukasopmjd.pointblog.net/rumored-buzz-on-d-cvt-77384602