Hybrid drive assembly for a motor vehicle

Patent metadata

Field	Value
Publication number	US-11993153-B2
Application number	US-202118027287-A
Country	US
Kind code	B2
Filing date	Aug 26, 2021
Priority date	Sep 28, 2020
Publication date	May 28, 2024
Grant date	May 28, 2024

Abstract

A hybrid drive assembly includes an internal combustion engine as a first drive machine having a first drive shaft, an electromechanical energy converter as a second drive machine having a second drive shaft, a switchable traction transmission device with a first transmission input shaft selectively connected to the first drive shaft, and a second transmission input shaft connected to the second drive shaft. The traction transmission device has an input planetary gear set having at least three transmission shafts, an input sun gear shaft, an input ring gear shaft, and an input planet carrier shaft. One of which is the first transmission input shaft, with a first torsional vibration reducing device arranged between it and the first drive shaft. Another of which is the second transmission input shaft, with a second torsional vibration reducing device arranged between it and the second drive shaft.

First claim

The invention claimed is:

1. A hybrid drive assembly comprising:
an internal combustion engine as a first drive machine, which has a first drive shaft;
an electromechanical energy converter as a second drive machine, which has a second drive shaft;
a switchable traction gear device comprising:
a first gear input shaft configured to be selectively connected to the first drive shaft;
a second gear input shaft configured to be connected to the second drive shaft; and
a gear output shaft that is configured to discharge drive power from at least one of the first drive machine or the second drive machine to a remaining motor vehicle drive train,
wherein the traction gear device is in the form of an epicyclic gear device and has an input planetary gear wheel set, wherein the input planetary gear wheel set has at least three gear shafts, of which one is in the form of an input sun gear shaft and one is in the form of an input ring gear shaft and one is in the form of an input planetary gear carrier shaft,
wherein a first one of the three gear shafts of the input planetary gear wheel set is the first gear input shaft, and wherein in a torque transmission direction from the first drive shaft to the first gear input shaft, a first torsional vibration reduction device is arranged therebetween,
wherein another of the three gear shafts of the input planetary gear wheel set is the second gear input shaft, and wherein, in a torque transmission direction from the second drive shaft to the second gear input shaft, a second torsional vibration reduction device is arranged therebetween, and
wherein the second drive shaft is connected with an electric machine gear stage to the second gear input shaft so that the second drive shaft is arranged axially parallel and radially spaced apart with respect to the second gear input shaft.

2. The hybrid drive assembly according to claim 1 , wherein the first gear input shaft is an input planetary gear carrier shaft.

3. The hybrid drive assembly according to claim 2 , wherein the second gear input shaft is an input sun gear shaft.

4. The hybrid drive assembly according to claim 1 , wherein the second gear input shaft is an input sun gear shaft.

5. The hybrid drive assembly according to claim 1 , wherein the electric machine gear stage is a gear mechanism comprising a drive gear that is connected in a rotationally secure manner to the second drive shaft and that is in engagement with an intermediate gear device that has the second torsional vibration reduction device, and wherein drive power is transmitted from the intermediate gear device to the second gear input shaft.

6. The hybrid drive assembly according to claim 1 , wherein the electric machine gear stage is a gear mechanism comprising a drive gear device that has the second torsional vibration reduction device and is thereby connected to the second drive shaft, and having an intermediate gear which is in engagement with the drive gear device, and wherein drive power is transmitted from the intermediate gear to the second gear input shaft.

7. The hybrid drive assembly according to claim 1 , wherein the electric machine gear stage is a traction gear mechanism and comprises a drive chain device which has the second torsional vibration reduction device and is thereby connected to the second drive shaft, and wherein electric machine traction means is provided to transmit drive forces from the second drive shaft to the second gear input shaft.

8. The hybrid drive assembly according to claim 1 , wherein the first drive shaft is connected with an internal combustion engine gear stage to the first gear input shaft so that the first drive shaft is arranged axially parallel and radially spaced apart with respect to the first gear input shaft.

9. The hybrid drive assembly according to claim 8 , wherein the second gear input shaft is selectively connected to a housing device via a switching element comprising a brake device.

10. The hybrid drive assembly according to claim 1 , wherein the second gear input shaft is selectively connected to a housing device via a switching element comprising a brake device.

11. The hybrid drive assembly according to claim 1 , wherein the input ring gear shaft is selectively connected to a housing device via a switching element comprising a brake device.

12. A hybrid drive assembly comprising:
an internal combustion engine as a first drive machine, which has a first drive shaft;
an electromechanical energy converter as a second drive machine, which has a second drive shaft;
a switchable traction gear device comprising:
a first gear input shaft configured to be selectively connected to the first drive shaft;
a second gear input shaft configured to be connected to the second drive shaft; and
a gear output shaft that is configured to discharge drive power from at least one of the first drive machine or the second drive machine to a remaining motor vehicle drive train,
wherein the traction gear device is in the form of an epicyclic gear device and has an input planetary gear wheel set, wherein the input planetary gear wheel set has at least three gear shafts, of which one is in the form of an input sun gear shaft and one is in the form of an input ring gear shaft and one is in the form of an input planetary gear carrier shaft,
wherein a first one of the three gear shafts of the input planetary gear wheel set is the first gear input shaft, and wherein in a torque transmission direction from the first drive shaft to the first gear input shaft, a first torsional vibration reduction device is arranged therebetween,
wherein another of the three gear shafts of the input planetary gear wheel set is the second gear input shaft, and wherein, in a torque transmission direction from the second drive shaft to the second gear input shaft, a second torsional vibration reduction device is arranged therebetween, and
wherein the first drive shaft is connected with an internal combustion engine gear stage to the first gear input shaft so that the first drive shaft is arranged axially parallel and radially spaced apart with respect to the first gear input shaft.

13. The hybrid drive assembly according to claim 12 , wherein the internal combustion engine gear stage comprises an internal combustion engine clutch device that is arranged concentrically with respect to the first drive shaft, wherein the internal combustion engine clutch device is configured to selectively interrupt the power transmission from the first drive shaft to the first gear input shaft, and wherein the first torsional vibration reduction device is arranged concentrically with respect to the first drive shaft.

14. The hybrid drive assembly according to claim 13 , wherein the first torsional vibration reduction device is arranged in a torque transmission direction from the first drive shaft to the first gear input shaft upstream of the internal combustion engine clutch device.

15. The hybrid drive assembly according to claim 12 , wherein the second gear input shaft is selectively connected to a housing device via a switching element comprising a brake device.

16. The hybrid drive assembly according to claim 12 , wherein the input ring gear shaft is selectively connected to a housing device via a switching element comprising a brake device.

17. The hybrid drive assembly according to claim 12 , wherein the first gear input shaft is an input planetary gear carrier shaft.

18. The hybrid drive assembly according to claim 12 , wherein the second gear input shaft is an input sun gear shaft.

1

Assignees

• Bayerische Motoren Werke Ag

Inventors

• Kluge Benjamin
• Liebert Sebastian
• Ohnemus Ulrich
• Pobitzer Fritz

Classifications

• B60K6/48 Primary

  Parallel type · CPC title

• B60K6/365

  with the gears having orbital motion · CPC title

• B60K6/38

  characterised by the driveline clutches (shift clutches within the gearing or transmission B60K6/36) · CPC title

• B60K6/547

  the transmission being a stepped gearing · CPC title

• B60K2006/4816

  Electric machine connected or connectable to gearbox internal shaft · CPC title