Hybrid drive system for a motor vehicle, and a motor vehicle, in particular a motor car

Patent metadata

Field	Value
Publication number	US-2025236166-A1
Application number	US-202318849051-A
Country	US
Kind code	A1
Filing date	Mar 3, 2023
Priority date	Mar 21, 2022
Publication date	Jul 24, 2025
Grant date	—

Abstract

A hybrid drive system for a motor vehicle has an internal combustion engine having a drive shaft via which first drive torques can be supplied by the internal combustion engine to drive the motor vehicle. The system also has an electric machine having a rotor via which second drive torques can be supplied by the electric machine to drive the motor vehicle. The system further has an axle drive having an axle drive input gear via which the axle drive can be driven and a gearbox having a first partial gearbox and a second partial gearbox. The first partial gearbox has a first planetary gear set having a first element, a second element, and a third element, as well as a second planetary gear set having a fourth element and a fifth element connected permanently in a rotationally fixed manner to the first element, and a sixth element.

First claim

1 - 9 . (canceled)

10 . A hybrid drive system for a motor vehicle, the hybrid drive system comprising:
an internal combustion engine having a drive shaft via which first drive torques are suppliable by the internal combustion engine to drive the motor vehicle; an electric machine having a rotor via which second drive torques are suppliable by the electric machine to drive the motor vehicle; an axle drive having an axle drive input gear via which the axle drive is drivable; a gearbox having a first partial gearbox and a second partial gearbox, wherein
the first partial gearbox has a first planetary gear set, which has a first element, a second element, and a third element,
the first partial gearbox has a second planetary gear set having a fourth element and a fifth element connected permanently in a rotationally fixed manner to the first element and a sixth element,
the second partial gearbox has a first spur gear stage, a second spur gear stage, and an output drive shaft,
the first spur gear stage has a first output gear wheel, which is arranged coaxially to the output drive shaft and meshes with a first input gear wheel that is connect or is connectable in a rotationally fixed manner to the third element,
the second spur gear stage has a second output gear wheel, which is arranged coaxially to the output drive shaft and meshes with a second input gear wheel that is connected or is connectable in a rotationally fixed manner to the sixth element, and
the rotor of the electric machine is coupled or couplable to the fourth element in such a way that the respective second drive torque, supplied by the electric machine via the rotor, is introducible at the fourth element into the gearbox;
an output drive gear wheel connected permanently in a rotationally fixed manner to the output drive shaft and meshing permanently with the axle drive input gear of the axle drive; a first switching element configured to connect the drive shaft of the internal combustion engine in a rotationally fixed manner to the second element; and a second switching element configured to connect the second element in a rotationally fixed manner to the sixth element, wherein the second spur gear stage is arranged on a side of the first partial gearbox facing away from the first spur gear stage when viewed in an axial direction, wherein the sixth switching element which is configured to connect the second input gear wheel in a rotationally fixed manner to the fifth element.

11 . The hybrid drive system of claim 10 , wherein the hybrid drive system includes in total exactly two planetary gear sets, wherein the exactly two planetary gear sets are the first planetary gear set and the second planetary gear set.

12 . The hybrid drive system of claim 10 , further comprising:
a third switching element configured to connect the sixth element in a rotationally fixed manner to a housing of the hybrid drive system.

13 . The hybrid drive system of claim 12 , further comprising:
a fourth switching element configured to connect the drive shaft in a rotationally fixed manner to the fourth element.

14 . The hybrid drive system of claim 13 , further comprising:
a fifth switching element configured to connect the sixth element in a rotationally fixed manner to the second input gear wheel.

15 . The hybrid drive system of claim 10 , wherein the first input gear wheel is connected permanently in a rotationally fixed manner to the third element.

16 . The hybrid drive system of claim 10 , wherein a rotor wheel of the electric machine, the second spur gear stage, the first partial gearbox, and the first spur gear stage, when viewed in the axial direction, are arranged one after another in following order: the rotor wheel, the second spur gear stage, the first partial gearbox, and the first spur gear stage.

17 . The hybrid drive system of claim 10 , wherein the drive shaft is arranged coaxially to the first partial gearbox, wherein the output drive gear wheel is arranged axially between the internal combustion engine and the first partial gearbox.

18 . A motor vehicle comprising:
a hybrid drive system, which comprises
an internal combustion engine having a drive shaft via which first drive torques are suppliable by the internal combustion engine to drive the motor vehicle;
an electric machine having a rotor via which second drive torques are suppliable by the electric machine to drive the motor vehicle;
an axle drive having an axle drive input gear via which the axle drive is drivable;
a gearbox having a first partial gearbox and a second partial gearbox, wherein
the first partial gearbox has a first planetary gear set, which has a first element, a second element, and a third element,
the first partial gearbox has a second planetary gear set having a fourth element and a fifth element connected permanently in a rotationally fixed manner to the first element and a sixth element,
the second partial gearbox has a first spur gear stage, a second spur gear stage, and an output drive shaft,
the first spur gear stage has a first output gear wheel, which is arranged coaxially to the output drive shaft and meshes with a first input gear wheel that is connect or is connectable in a rotationally fixed manner to the third element,
the second spur gear stage has a second output gear wheel, which is arranged coaxially to the output drive shaft and meshes with a second input gear wheel that is connected or is connectable in a rotationally fixed manner to the sixth element, and
the rotor of the electric machine is coupled or couplable to the fourth element in such a way that the respective second drive torque, supplied by the electric machine via the rotor, is introducible at the fourth element into the gearbox;

an output drive gear wheel connected permanently in a rotationally fixed manner to the output drive shaft and meshing permanently with the axle drive input gear of the axle drive;
a first switching element configured to connect the drive shaft of the internal combustion engine in a rotationally fixed manner to the second element; and
a second switching element configured to connect the second element in a rotationally fixed manner to the sixth element,
wherein the second spur gear stage is arranged on a side of the first partial gearbox facing away from the first spur gear stage when viewed in an axial direction, and
wherein the sixth switching element which is configured to connect the second input gear wheel in a rotationally fixed manner to the fifth element.

Assignees

• Mercedes Benz Group Ag

Inventors

• Schilder Tobias
• Riedl Klaus
• Mueller Joerg
• Resch Rico
• Stoecker Martin

Classifications

• F16H2200/2046

  with six engaging means · CPC title

• F16H2200/2043

  with five engaging means · CPC title

• F16H2200/2007

  with two sets of orbital gears · CPC title

• F16H37/0806

  with a plurality of driving or driven shafts · CPC title

• B60Y2200/92

  Hybrid vehicles · CPC title