Device including a gear unit and an electric machine for a hybrid drive and hybrid drive

Patent metadata

Field	Value
Publication number	US-9776498-B2
Application number	US-201414309191-A
Country	US
Kind code	B2
Filing date	Jun 19, 2014
Priority date	Jun 20, 2013
Publication date	Oct 3, 2017
Grant date	Oct 3, 2017

Abstract

An assembly includes a transmission and an electric machine for a hybrid drive of a motor vehicle, and the transmission is a multi-stage standard transmission with first and second subtransmissions, each of which has a separate input shaft and shares an output shaft. Both input shafts are coupled to the shared output shaft via form locking shift elements of the subtransmissions. The assembly includes a first shiftable clutch which is allocated to a first input shaft such that the internal combustion engine is coupled to the first input shaft via the first shiftable clutch, and a second shiftable clutch which is allocated to the second input shaft such that the electric machine is coupled to the second input shaft via the second shiftable clutch. The electric machine is coupled to the internal combustion engine via a third shiftable clutch, and to the first input shaft via a fourth shiftable clutch.

First claim

What is claimed is:

1. An assembly comprising a transmission and an electric machine for a hybrid drive of a motor vehicle, wherein the transmission is a multi-stage standard transmission comprising:
a first subtransmission comprising a first input shaft; and
a second subtransmission comprising a second input shaft, said first and second subtransmissions sharing a shared output shaft;
wherein the first and second input shafts are coupled to the shared output shaft via form locking shift elements of the first and second subtransmissions;
wherein a first shiftable clutch is allocated to the first input shaft of the first subtransmission such that an internal combustion engine is coupled to the first input shaft via the first shiftable clutch, and a second shiftable clutch is allocated to the second input shaft of the second subtransmission such that the electric machine is coupled to the second input shaft via the second shiftable clutch;
wherein the electric machine is coupled to the internal combustion engine via a third shiftable clutch, and to the first input shaft via a fourth shiftable clutch; and
wherein the electric machine is positioned between the second shiftable clutch and the fourth shiftable clutch, and wherein the first shiftable clutch and the third shiftable clutch are positioned on the same side of the electric machine as the fourth shiftable clutch.

2. The assembly according to claim 1 , wherein the first shiftable clutch, by means of which the internal combustion engine is coupled to the first input shaft of the first subtransmission, is a friction locking clutch.

3. The assembly according to claim 1 , wherein the third shiftable clutch, by means of which the electric machine is coupled to the internal combustion engine, is a form locking clutch.

4. The assembly according to claim 1 , wherein the second shiftable clutch, by means of which the electric machine is coupled to the second input shaft of the second subtransmission, and the fourth shiftable clutch by means of which the electric machine is coupled to the first input shaft of the first subtransmission, are form locking clutches.

5. The assembly according to claim 4 , wherein the first subtransmission provides a first forward gear and the second subtransmission provides a second forward gear.

6. The assembly according to claim 4 , wherein the third shiftable clutch and the fourth shiftable clutch, each of which is a form locking clutch, form a double-shift element.

7. The assembly according to claim 1 , wherein the second shiftable clutch, by means of which the electric motor is coupled to the second input shaft of the second subtransmission, is a friction locking clutch, and the fourth shiftable clutch, by means of which the electric machine is coupled to the first input shaft of the first subtransmission, is a form locking clutch.

8. The assembly according to claim 7 , wherein the first subtransmission provides a first forward gear, and the second subtransmission provides a second forward gear.

9. The assembly according to claim 7 , wherein the first subtransmission provides a second forward gear, and the second subtransmission provides a first forward gear.

10. The assembly according to claim 1 , wherein the second shiftable clutch, by means of which the electric machine is coupled to the second input shaft of the second subtransmission, and the fourth shiftable clutch, by means of which the electric machine is coupled to the first input shaft of the first subtransmission, are friction locking clutches.

11. The assembly according to claim 10 , wherein the first subtransmission provides a first forward gear, and the second subtransmission provides a second forward gear.

12. The assembly according to claim 10 , wherein the first subtransmission provides a second forward gear, and the second subtransmission provides a first forward gear.

13. The assembly according to claim 1 , wherein the first subtransmission and the second subtransmission are coupled when at least one winding gear path is provided.

14. The assembly according to claim 13 , wherein the first subtransmission and the second subtransmission are coupled, at least in a first forward gear, via a winding shift element.

15. The assembly according to claim 1 , wherein the shared output shaft is coupled to the first and second subtransmissions via a differential gear.

16. The assembly according to claim 1 , wherein an input drive side clutch half of the second shiftable clutch is coupled to an output drive side clutch half of the first shiftable clutch via the fourth shiftable clutch.

17. The assembly according to claim 1 , wherein the first and second input shafts are coaxially disposed to one another.

18. A hybrid drive for a motor vehicle, having the internal combustion engine and the assembly according to claim 1 .

19. An assembly comprising a transmission and an electric machine for a hybrid drive of a motor vehicle, wherein the transmission is a multi-stage standard transmission comprising:
a first subtransmission comprising a first input shaft; and
a second subtransmission comprising a second input shaft, said first and second subtransmissions sharing a shared output shaft;
wherein the first and second input shafts are coupled to the shared output shaft via form locking shift elements of the first and second subtransmissions;
wherein a first shiftable clutch is allocated to the first input shaft of the first subtransmission such that an internal combustion engine is coupled to the first input shaft via the first shiftable clutch, and a second shiftable clutch is allocated to the second input shaft of the second subtransmission such that the electric machine is coupled to the second input shaft via the second shiftable clutch;
wherein the electric machine is coupled to the internal combustion engine via a third shiftable clutch, and to the first input shaft via a fourth shiftable clutch;
wherein an input drive side clutch half of the second shiftable clutch is always connected to the electric machine, and an output drive side clutch half of the second shiftable clutch is always connected to the second input shaft of the second subtransmission; and
wherein an input drive side clutch half of the third shiftable clutch is always connected to the internal combustion engine.

20. An assembly comprising a transmission and an electric machine for a hybrid drive of a motor vehicle, wherein the transmission is a multi-stage standard transmission comprising:
a first subtransmission comprising a first input shaft; and
a second subtransmission comprising a second input shaft, said first and second subtransmissions sharing a shared output shaft;
wherein the first and second input shafts are coupled to the shared output shaft via form locking shift elements of the first and second subtransmissions;
wherein a first shiftable clutch is allocated to the first input shaft of the first subtransmission such that an internal combustion engine is coupled to the first input shaft via the first shiftable clutch, and a second shiftable clutch is allocated to the second input shaft of the second subtransmission such that an output drive side clutch half of the first shiftable clutch is coupled to the second input shaft via the second shiftable clutch;
wherein the electric machine is coupled to the internal combustion engine via a third shiftable clutch, and to the first input shaft via a fourth shiftable clutch; and
wherein the electric machine is positioned between the second shiftable clutch an

Assignees

• Zahnradfabrik Friedrichshafen

Inventors

• Kaltenbach Johannes
• Wehlen Timo
• Roske Michael

Classifications

• F16H2003/007

  with two flow paths, one being directly connected to the input, the other being connected to the input through a clutch · CPC title

• F16H2200/0056

  the gear ratios comprising seven forward speeds · CPC title

• Y02T10/6221

  Cross-Sectional Technologies · mapped topic

• B60K6/547 Primary

  the transmission being a stepped gearing · CPC title

• F16H2003/0931

  each countershaft having an output gear meshing with a single common gear on the output shaft · CPC title