Patent ID: 8777790

Claim:
A continuously variable transmission device ( 1 ) comprising: a power split which takes place in an area of a sum planetary transmission ( 9 ), the sum planetary transmission comprising first and second drive input shafts and a third shaft, the first drive input shaft ( 8 ) of the sum planetary transmission ( 9 ) being operationally connectable with a drive machine ( 3 )designed as a first electric machine such that the first drive input shaft is driven by the first electric machine, the second drive input shaft ( 12 ) of the sum planetary transmission ( 9 ) being connectable for a continuous variation of gear ratios with a second electric machine ( 36 ) which is connectable with the first electric machine, the first electric machine being electrically coupled to an electric energy source ( 38 ) and thereby coupled, via the second electric machine, with the second drive input shaft ( 12 ) of the sum planetary transmission ( 9 ), the third shaft ( 10 ) being a drive output shaft of the sum planetary transmission ( 9 ) and a drive input element of a shift transmission, the third shaft being connectable, via the shift transmission, with an output ( 4 ) of the continuously variable transmission, the shift transmission ( 50 ) comprises a plurality of planetary transmission devices ( 18 , 19 , 20 ) and their shafts which enable different gear ratio ranges in which each of the gear ratios is continuously variable, via the sum planetary transmission ( 9 ) and the second electric machine ( 36 ) which are connectable to the output of the continuously variable transmission via shift elements ( 21 to 24 ).