Patent ID: 8075436

Claim:
A hybrid drive train of a motor vehicle comprising: an internal combustion engine (VM) with a driveshaft ( 4 ), an electric motor (EM) with a rotor ( 6 ) that is operable as an engine and as a generator, a multi-stage transmission ( 7 ) with first and second input shafts (GE 1 , GE 2 ) and an output shaft (GA), a differential transmission ( 8 ) in which at least one of the first and the second input shafts (GE 1 , GE 2 ) is connected to the driveshaft ( 4 ) by an assigned decoupler (K), and both the first and the second input shafts (GE 1 , GE 2 ) being selectively connected by alternately assigned gearwheel sets of different ratios and in each case one assigned gear clutch to the output shaft (GA), the differential transmission ( 8 ) being a simple planetary gearset ( 9 ) is arranged coaxially about the first input shaft (GE 1 ), a ring gear (H) being connected, in a rotationally fixed manner, to the first input shaft (GE 1 ), a planet carrier (PT) being connected in a rotationally fixed manner to the second input shaft (GE 2 ), and a sun gear (S) of the planetary gearset having a drive connection with the rotor ( 6 ), only the first input shaft (GE 1 ) which is connected, in a rotationally fixed manner, with the ring gear (H) which is connectable, by a decoupler (K), to the driveshaft ( 4 ), and the multi-stage transmission ( 7 ) being a countershaft transmission with a coaxially adjacent arrangement of the output shaft (GA), and first and second countershafts (VG 1 , VG 2 ) which have, in each case, a drive connection with one of the first and the second input shafts (GE 1 , GE 2 ) by an input constant (EK 1 , EK 2 ), the gearwheel sets of which are respectively arranged alternately on the first countershaft (VG 1 ) and on the output shaft (GA), and the second countershaft (VG 2 ) and the output shaft (GA).