Patent ID: 6896635

Claim:
A method for reclamation of braking energy, comprising the following steps: providing a transfer case for distributing a driving force on a first axle ( 9 ) and a second axle ( 8 ) of a motor vehicle; arranging the transfer case between the first axle ( 9 ) and the second axle ( 8 ), wherein the transfer case includes an epicyclic gear ( 3 ) with two central gears ( 4 , 5 ), a rotary cross-piece ( 6 ) with at least one gear wheel ( 7 ), and an electrical machine ( 2 ); connecting the electrical machine ( 2 ) with an element ( 4 , 5 , 6 ) of the epicyclic gear ( 3 ); connecting one of two other elements of the epicyclic gear ( 3 ) with the first axle ( 9 ) and the other of the two other elements of the epicyclic gear with the second axle ( 8 ), wherein the distribution of the driving force on the first and the second axles ( 8 , 9 ) takes place by means of control of the electrical machine ( 2 ), wherein the epicyclic gear ( 3 ) is a planetary gear with two central gears ( 4 , 5 ) and a planetary pinion support ( 6 ) with at least one planetary pinion ( 7 ); connecting the electrical machine ( 2 ) with a sun gear ( 4 ) of the planetary gear ( 3 ), wherein the first axle ( 9 ) is a rear axle and the second axle ( 8 ) is a front axle; connecting an internal gear ( 5 ) of the planetary gear with the front axle ( 8 ); connecting the planetary pinion support ( 6 ) with the rear axle ( 9 ); arranging an additional switch element ( 21 ) between the planetary gear support ( 6 ) and the rear axle ( 9 ), in order to connect the planetary gear support ( 6 ) with the sun gear ( 4 ) and to break a connection to the rear axle ( 9 ); breaking the connection of the transfer case to the rear axle; and revolving the epicyclic gear ( 3 ) as a block.