Patent ID: 8444519

Claim:
A hybrid drive train for a motor vehicle, the drive train comprising: an internal combustion engine with a driveshaft; an electric machine (EM) being operable as both a motor and as a generator, and the electric machine (EM) comprising a stator ( 34 ; 65 ) and a rotor ( 35 ; 66 ); a transmission ( 1 ; 51 , 51 ′) having an input shaft ( 17 ; 52 ) and an output shaft ( 18 ; 53 ); the driveshaft of the internal combustion engine being connectable by at least a controllable first separator clutch (K 1 ) to the input shaft ( 17 ; 52 ) of the transmission ( 1 ; 51 , 51 ′); the electric machine (EM) being arranged coaxially around the input shaft ( 17 ; 52 ) of the transmission ( 1 ; 51 , 51 ′); the rotor ( 35 ; 66 ) of the electric machine (EM) being in driving connection with the input shaft ( 17 ; 52 ) of the transmission ( 1 ; 51 , 51 ′) via an input transmission stage ( 36 ; 63 ) which is formed as a simple planetary gearset with a sun gear ( 37 ; 67 ), the simple planetary gearset forming a gear ratio (i EK >1), between the rotor ( 35 ; 66 ) of the electric machine (EM) and the input shaft ( 17 ; 52 ) which is greater than one, so as to minimize a rotational speed of the electric machine (EM) when driving the hybrid drive train via the electric machine (EM), a plurality of planetary gears ( 38 ; 68 ) mounted for rotation on and distributed around a circumference of a planetary carrier ( 39 ; 69 ) and meshing with the sun gear ( 37 ; 67 ), and a ring gear ( 40 ; 70 ) meshing with the planetary gears ( 38 ; 68 ) such that the sun gear ( 37 ; 67 ) being fixed relative to a component ( 33 ; 64 ) attached to a housing, the ring gear ( 40 ; 70 ) being connected in a rotationally fixed manner to the rotor ( 35 ; 66 ) of the electric machine (EM), and the planetary carrier ( 39 ; 69 ) being connected in a rotationally fixed manner to the input shaft ( 17 ; 52 ) of the transmission ( 1 ; 51 , 51 ′).