The present invention provides a hybrid powertrain comprising an internal combustion engine (ICE), a transmission (2), a first electric motor (4a) and a second electric motor (4b), wherein the transmission comprises an input shaft (1) to which the ICE is connected via a main clutch (3), an output shaft (6) and a gear assembly providing at least two different gear ratios that may be selected for transfer of mechanical power from the input shaft (1) to the output shaft (6), the first electric motor (4a) is connected to the input shaft (1) via a first gear (i.sub.x), such that torque and rotation may be transferred between the first electric motor and the input shaft, and the second electric motor (4b) is connected to the input shaft (1) via a first clutch (5a) and the first gear (i.sub.x), such that torque and rotation may be transferred between the second electric motor (4b) and the input shaft (1), and connected to the output shaft (6) via a second clutch (5b) and a second gear (i.sub.y), such that torque and rotation may be transferred between the second electric motor (4b) and the output shaft (6), wherein the first electric motor (4a) is connected to the second electric motor (4b) via the first clutch (5a), and the first electric motor (4a), the second electric motor (4b), the first clutch (5a) and the second clutch (5b) form parts of a torque transfer path bypassing the at least two different gear ratios, the torque transfer path arranged to transfer torque from the input shaft (1) to the output shaft (6) during a gearshift.

A generator module includes a housing arranged for mounting to a rear face of an internal combustion engine, a generator stator fixed in the housing, a generator rotor arranged radially inside of the generator stator, and a bearing arranged to support a radial inside of the generator rotor on the housing. The generator rotor may include a rotor carrier and a plurality of stacked plates secured to the rotor carrier. The bearing may be at least partially radially aligned with the plurality of stacked plates.

A drive unit for a powertrain of an electrically drivable motor vehicle, in particular a hybrid motor vehicle, is equipped with a first electric machine as well as a second electric machine and a first shaft as well as an output shaft. The drive unit furthermore has a separating clutch and a connection element for connection for conjoint rotation of an internal combustion engine, and wherein at least the first electric machine is operated in generator mode and the nominal rpm n.sub.1 of the first electric machine has the following relationship to the nominal rpm n.sub.2 of the second electric machine:
n.sub.1>1.2×n.sub.2.

A drive module for a vehicle includes an input extending along an axis and configured to be driven by an engine. An electric motor has a rotor carrier hub configured to be rotated about the axis. The rotor carrier hub is non-rotatably connected to a torque converter cover and is selectively coupled to the input via a clutch. The rotor carrier hub has an inner surface defining an interior, an outer surface defining an exterior, and a plurality of holes extending through the rotor carrier hub from the inner surface to the outer surface to enable oil to transfer from the interior to the exterior. This provides a controlled and relative constant oil flow for cooling the drive module.

A drive module for a vehicle includes an input extending along an axis and configured to be driven by an engine. An electric motor has a rotor carrier hub configured to be rotated about the axis. The rotor carrier hub is non-rotatably connected to a torque converter cover and is selectively coupled to the input via a clutch. The rotor carrier hub has an inner surface defining an interior, an outer surface defining an exterior, and a plurality of holes extending through the rotor carrier hub from the inner surface to the outer surface to enable oil to transfer from the interior to the exterior. This provides a controlled and relative constant oil flow for cooling the drive module.

A method of assembling a modular hybrid transmission (MHT) is provided including (a) assembling an emotor clutch on a clutch shaft to form a clutch assembly, (b) press-fitting a bushing into a centering plate to form a centering assembly, (c) connecting the centering assembly to a torque converter, (d) assembling the torque converter to the clutch assembly with the bushing on an end of the clutch shaft, and (e) inserting the clutch assembly and the torque converter into a transmission housing while maintaining the centering of the clutch shaft to the transmission housing via the centering assembly connected to the torque converter. The assembled MHT is also provided which eliminates the needle bearing according to the prior art, avoiding the potential for damage during assembly.

A method of assembling a modular hybrid transmission (MHT) is provided including (a) assembling an emotor clutch on a clutch shaft to form a clutch assembly, (b) press-fitting a bushing into a centering plate to form a centering assembly, (c) connecting the centering assembly to a torque converter, (d) assembling the torque converter to the clutch assembly with the bushing on an end of the clutch shaft, and (e) inserting the clutch assembly and the torque converter into a transmission housing while maintaining the centering of the clutch shaft to the transmission housing via the centering assembly connected to the torque converter. The assembled MHT is also provided which eliminates the needle bearing according to the prior art, avoiding the potential for damage during assembly.

A hybrid transmission arrangement (10) for a motor vehicle (30) includes a transmission (11), a third planetary gear set (PS3), and a first electric machine (EM1). The transmission (11) includes a first input (14), which is connectable to an internal combustion engine (VM), a second output (22), a third output (23), and at least one planetary gear set (PS1, PS2). The third planetary gear set (PS3) includes a first element (S3;H3′), a second element (H3;S3′), and a third element (P3;P3′). The third planetary gear set (PS3) is interlockable using a first shift element (E) and arranged coaxially to a first axis (A1). The first element (S3;H3′) is connected to the first electric machine. The second element (H3;S3′) is connected to the second output (22) of the transmission (11). The third output (23) of the transmission (11) is connected to the first element (S3;H3′). The third element (P3;P3′) is connected to a drive output (Ab) of the hybrid transmission arrangement (10).

A hybrid transmission arrangement (10) for a motor vehicle (30) includes a transmission (11), a third planetary gear set (PS3), and a first electric machine (EM1). The transmission (11) includes a first input (14), which is connectable to an internal combustion engine (VM), a second output (22), a third output (23), and at least one planetary gear set (PS1, PS2). The third planetary gear set (PS3) includes a first element (S3;H3′), a second element (H3;S3′), and a third element (P3;P3′). The third planetary gear set (PS3) is interlockable using a first shift element (E) and arranged coaxially to a first axis (A1). The first element (S3;H3′) is connected to the first electric machine. The second element (H3;S3′) is connected to the second output (22) of the transmission (11). The third output (23) of the transmission (11) is connected to the first element (S3;H3′). The third element (P3;P3′) is connected to a drive output (Ab) of the hybrid transmission arrangement (10).

A hybrid electric vehicle including: (a) an engagement device disposed between an engine and an electric motor; (b) a transmission disposed between the electric motor and drive wheels; (c) an electric storage device configured to supply an electric power to the electric motor; and (d) a control apparatus. When the engine is to be started, the engagement device is engaged to transmit a torque from the electric motor to the engine, for thereby starting the engine. The control apparatus is configured to inhibit stop of the engine, when an outputtable electric power outputtable from the electric storage device is not larger than a threshold value. The threshold value is not smaller than a start-case-required electric power that is required to start the engine, such that a difference value between the threshold value and the start-case-required electric power is not larger than a predetermined value.