Transmission for a motor vehicle

Patent metadata

Field	Value
Publication number	US-11221060-B2
Application number	US-201616060479-A
Country	US
Kind code	B2
Filing date	Nov 11, 2016
Priority date	Dec 9, 2015
Publication date	Jan 11, 2022
Grant date	Jan 11, 2022

Abstract

A transmission (1) for a motor vehicle includes at least one input shaft (2) which can be connected to an internal combustion engine (VM) in a rotationally fixed manner and with at least one input shaft power transmission element, a first shaft (3) including at least one power transmission element, a second shaft (4) including at least one other power transmission element, and a transmission output shaft (5) which is engaged with the first shaft (3) and the second shaft (4). The transmission (1) includes at least one gear plane (RE), in which the at least one input shaft power transmission element is engaged with the at least one power transmission element and with the at least one other power transmission element. The transmission (1) includes precisely two gear planes, and the power transmission element and the other power transmission element are each an idler gear.

First claim

The invention claimed is:

1. A transmission ( 1 ) for a motor vehicle, comprising:
at least one input shaft connectable to an internal combustion engine (VM) in a rotationally fixed manner, the at least one input shaft including at least one input shaft power transmission element;
a first shaft ( 3 ) including at least one power transmission element;
a second shaft ( 4 ) including at least one other power transmission element; and
a transmission output shaft ( 5 ) engaged with the first shaft ( 3 ) and the second shaft ( 4 ),
wherein the transmission ( 1 ) includes at least one gear plane (RE) in which the at least one input shaft power transmission element is engaged with the at least one power transmission element of the first shaft ( 3 ) and with the at least one other power transmission element of the second shaft ( 4 ),
wherein the at least one gear plane (RE) is no more than and precisely two gear planes, the at least one power transmission element of the first shaft ( 3 ) is an idler gear, and the at least one other power transmission element of the second shaft ( 4 ) is an idler gear, and
wherein a second engagement device (SE 2 ) is arranged such that a first single component of a first gear plane (RE 1 ) of the two gear planes is connected to a second single component of a second gear plane (RE 2 ) of the two gear planes in a rotationally fixed manner when the second engagement device (SE 2 ) is in an engaged position.

2. The transmission ( 1 ) of claim 1 , wherein a first input shaft power transmission element of the at least one input shaft power transmission element is engaged with a first idler gear ( 9 ) and a first other idler gear ( 11 ) in a first gear plane (RE 1 ) of the two gear planes.

3. The transmission ( 1 ) of claim 2 , wherein a second input shaft power transmission element of the at least one input shaft power transmission element is engaged with a second idler gear ( 10 ) and a second other idler gear ( 12 ) in a second gear plane (RE 2 ) of the two gear planes.

4. The transmission of claim 3 , further comprising a fourth engagement device (SE 4 ) arranged such that:
the first idler gear ( 9 ) is connected to the first shaft ( 3 ) in a rotationally fixed manner in a first engaged position of the fourth engagement device (SE 4 ); and
the second idler gear ( 10 ) is connected to the first shaft ( 3 ) in a rotationally fixed manner in an engaged second position of the fourth engagement device (SE 4 ).

5. The transmission ( 1 ) of claim 2 , further comprising a first engagement device (SE 1 ) arranged such that the first other idler gear ( 11 ) is connected to the second shaft ( 4 ) in a rotationally fixed manner when the first engagement device (SE 1 ) is in an engaged position.

6. The transmission ( 1 ) of claim 2 , further comprising a first engagement device (SE 1 ) including a first shift element (S 2 ), wherein the first other idler gear ( 11 ) is connected to the second shaft ( 4 ) in a rotationally fixed manner when the first engagement device (SE 1 ) is in an engaged position.

7. The transmission of claim 2 , further comprising a fourth engagement device (SE 4 ) with a sixth shift element (S 4 ), wherein the first idler gear ( 9 ) is connected to the first shaft ( 3 ) in a rotationally fixed manner when the sixth shift element (S 4 ) is in an engaged position.

8. The transmission ( 1 ) of claim 1 , wherein a second input shaft power transmission element of the at least one input shaft power transmission element is engaged with a second idler gear ( 10 ) and a second other idler gear ( 12 ) in a second gear plane (RE 2 ) of the two gear planes.

9. The transmission of claim 8 , further comprising a fourth engagement device (SE 4 ) with a seventh shift element (S 5 ), wherein the second idler gear ( 10 ) is connected to the first shaft ( 3 ) in a rotationally fixed manner when the seventh shift element (S 5 ) is in an engaged position.

10. The transmission ( 1 ) of claim 1 , wherein a first input shaft of the at least one input shaft is a hollow shaft ( 20 ) and a second input shaft of the at least one input shaft is a solid shaft ( 21 ).

11. The transmission ( 1 ) of claim 10 , wherein a first input shaft power transmission element of the at least one input shaft power transmission element is connected to the hollow shaft in a rotationally fixed manner in a first gear plane (RE 1 ) of the two gear planes.

12. The transmission ( 1 ) of claim 10 , wherein a second input shaft power transmission element of the at least one input shaft power transmission element is connected to the solid shaft in a rotationally fixed manner in a second gear plane (RE 2 ) of the two gear planes.

13. The transmission of claim 1 , wherein the first single component of the first gear plane (RE 1 ) and the second single component of the second gear plane (RE 2 ) are not connected to the first shaft ( 3 ) or the second shaft ( 4 ) in a rotationally fixed manner.

14. The transmission of claim 1 , further comprising a third engagement device (SE 3 ), wherein the at least one input shaft is connectable to the internal combustion engine (VM) in a rotationally fixed manner by the third engagement device (SE 3 ).

15. The transmission of claim 1 , further comprising a third engagement device (SE 3 ) with a fourth shift element (K 1 ), wherein a hollow shaft ( 20 ) or a solid shaft ( 21 ) is connectable to the internal combustion engine (VM) in a rotationally fixed manner by the fourth shift element (K 1 ).

16. The transmission of claim 15 , wherein the third engagement device (SE 3 ) also includes a fifth shift element (K 2 ), and the hollow shaft ( 20 ) or the solid shaft ( 21 ) is connectable to the internal combustion engine (VM) in a rotationally fixed manner by the fifth shift element (K 2 ).

17. The transmission of claim 16 , wherein the third engagement device (SE 3 ) is a dual clutch.

18. The transmission ( 1 ) of claim 1 , further comprising a connecting means ( 16 ) and an electric machine (EM), the electric machine (EM) couplable to the transmission in a rotationally fixed manner with the connecting means ( 16 ).

19. The transmission ( 1 ) of claim 18 , further comprising an input shaft ( 15 ) which is connected to a third engagement device (SE 3 ) in a rotationally fixed manner, wherein the connecting means ( 16 ) is connected to the input shaft ( 15 ) in a rotationally fixed manner.

20. The transmission ( 1 ) of claim 18 , wherein the connecting means ( 16 ) is connected to a third engagement device (SE 3 ) in a rotationally fixed manner.

21. The transmission ( 1 ) of claim 18 , wherein the connecting means ( 16 ) is connected to a hollow shaft ( 20 ) in a rotationally fixed manner.

22. The transmission ( 1 ) of claim 1 , further comprising yet another power transmission element (R) that is engaged with the input shaft power transmission element and with one of the idler gears.

23. The transmission ( 1 ) of claim 1 , further comprising yet another power transmission element (R), wherein:
a first input shaft power transmission element of the at least one input shaft power transmission element is engaged with a first idler gear ( 9 ) and a first other idler gear ( 11 ) in a first gear plane (RE 1 ) of the two gear planes; and
the yet another power transmission element (R) is engaged with the first input shaft power transmission element and with the first idler gear ( 9 ) or with the first other idler gear ( 11 ).

24. The transmi

Assignees

• Zahnradfabrik Friedrichshafen

Inventors

• WAFZIG JüRGEN
• Wechs Michael
• Wehlen Timo
• Kaltenbach Johannes

Classifications

• F16H2200/0052

  the gear ratios comprising six forward speeds · CPC title

• F16H3/093

  with two or more countershafts · CPC title

• F16H2003/0807

  with gear ratios in which the power is transferred by axially coupling idle gears to each other · CPC title

• F16H2003/0931

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

• F16H2200/0047

  the gear ratios comprising five forward speeds · CPC title