Patent ID: 7288044

Claim:
An automated power-split multi-speed transmission ( 1 ), comprising: at least first, second and third power branches (P 1 , P 2 , P 3 ), the first power branch (P 1 ) is connected to a first shaft ( 2 ), the second power branch (P 2 ) is connected to a second shaft ( 3 ) and the third power branch (P 3 ) is connected to a third shaft ( 4 ), and the first, the second and the third shafts ( 2 , 3 , 4 ) communicate with a downstream planetary gearset ( 5 ), the first shaft ( 2 ) having at least a first partial transmission ratio (i 1 ), the second shaft ( 3 ) having at least a second partial transmission ratio (i 2 ) and the third shaft ( 4 ) having at least a third partial transmission ratio (i 3 ), the first power branch (P 1 ) having a first control element (S 6 ) for connecting the first power branch (P 1 ) to a power flow at the first partial transmission ratio (i 1 ), the second power branch (P 2 ) having a second control element (S 5 ) for connecting the second power branch (P 2 ) to a power flow at the second partial transmission ratio (i 2 ), and the third power branch (P 3 ) having a third control element (S 1 ) for connecting the third power branch (P 1 ) to a power flow at the first partial transmission ratio (i 3 ), at least one of the second and the third shafts ( 3 , 4 ) of the planetary gearset ( 5 ) interacting with an additional control element (S 2 , S 4 ), via which the at least one of the second and the third shafts ( 3 , 4 ) can be connected to a housing, ( 6 ) and a third additional control element (S 3 ) being arranged between the second and the third shafts ( 3 , 4 ) of the planetary gearset ( 5 ), the third additional control element (S 3 ), in an engaged state, blocks the planetary gearset ( 5 ), and the transmission ( 1 ) having eight forward gears.