POWERTRAIN

The present invention provides a powertrain comprising a first electric motor (), a second electric motor (), a transmission assembly, a planetary gear () and a wheel drive axle (), wherein the transmission assembly comprises a first input () connected to the first electric motor (), a second input () connected to the second electric motor, and at least a first output () to which both the first electric motor () and the second electric motor () may provide torque, wherein the first input () is connectable to the first output () by a plurality of gear sets () being selectable by a first clutch assembly (), and the second input () is connectable to the first output () by a plurality of gear sets () being selectable by a second clutch assembly (′), to provide at least two gear ratios between the first output () and each of the first input () and the second input (), wherein the gear sets and clutch assemblies are configured to allow a change between the two gear ratios without torque interrupt; and the planetary gear () comprises a sun gear (), a ring gear () and a carrier (), the carrier () is connected to the wheel drive axle () and the planetary gear () is shiftable between a first gear state, a second gear state and a third gear state, in the first gear state the ring gear () is kept rotationally stationary to provide a highest possible inherent gear ratio between the carrier () and the sun gear (), in the second gear state a rotational speed of the ring gear () depends on the rotation of both the sun gear () and the carrier (), and in the third gear state any two of the ring gear (), the sun gear () and the carrier are kept rotationally constant to each other to provide a 1:1 gear ratio between the sun gear () and the carrier (); and the first output () of the transmission assembly is coupled to the sun gear ().