Transmission for a motor vehicle

Patent metadata

Field	Value
Publication number	US-10913342-B2
Application number	US-201816772553-A
Country	US
Kind code	B2
Filing date	Nov 20, 2018
Priority date	Dec 14, 2017
Publication date	Feb 9, 2021
Grant date	Feb 9, 2021

Abstract

A transmission (G) for a motor vehicle includes an electric machine (EM), an input shaft (GW1), an output shaft (GWA), two planetary gear sets (P1, P2), and at least five shift elements (A, B, C, D, E). Different gears can be selected by selectively actuating the at least five shift elements (A, B, C, D, E). In interaction with the electric machine (EM), different operating modes can be implemented.

First claim

The invention claimed is:

1. A transmission (G) for a motor vehicle, comprising:
an electric machine (EM);
an input shaft (GW 1 ); an output shaft (GWA);
a first planetary gear set (P 1 ) and a second planetary gear set (P 2 ), each of the first and second planetary gear sets (P 1 , P 2 ) comprising a first element (E 11 , E 12 ), a second element (E 21 , E 22 ), and a third element (E 31 , E 32 ), the first element (E 11 , E 12 ) formed by a sun gear of the respective planetary gear set, the second element (E 21 , E 22 ) formed by a carrier when the respective planetary gear set is a minus planetary gear set or by a ring gear when the respective planetary gear set is a positive gear set, the third element (E 31 , 32 ) formed by the ring gear when the respective planetary gear set is the minus planetary gear set or by the carrier when the respective planetary gear set is the positive planetary gear set; and
a first shift element (A), a second shift element (B), a third shift element (C), a fourth shift element (D), and a fifth shift element (E),
wherein the electric machine (EM) is connected to the input shaft (GW 1 ), to the output shaft (EWA), or to at least one of the elements (E 11 , E 21 , E 31 , E 12 , E 22 , E 32 ) of the planetary gear sets (P 1 , P 2 ),
wherein the input shaft (GW 1 ) is connectable in a rotationally fixed manner via the first shift element (A) to the first element (E 11 ) of the first planetary gear set (P 1 ), and the first element (E 11 ) of the first planetary gear set (P 1 ) is rotationally fixable with the second shift element (B),
wherein the input shaft (GW 1 ) is also rotationally fixed to the second element (E 22 ) of the second planetary gear set (P 2 ),
wherein the output shaft (GWA) is rotationally fixed to the second element (E 21 ) of the first planetary gear set (P 1 ), and
wherein the input shaft (GW 1 ) is connectable in a rotationally fixed manner via the third shift element (C) to the third element (E 31 ) of the first planetary gear set (P 1 ).

2. The transmission (G) of claim 1 , wherein the first element (E 12 ) of the second planetary gear set (P 2 ) is rotationally fixed, the output shaft (GWA) is connectable in a rotationally fixed manner with the fourth shift element (D) to the third element (E 32 ) of the second planetary gear set, and the output shaft (GWA) is rotationally fixable via the fifth shift element (E) to the input shaft (GW 1 ).

3. The transmission (G) of claim 2 , wherein, by selectively engaging the first, second, third, fourth, and fifth elements (A, B, C, D, E):
a first gear ( 1 ) results between the input shaft (GW 1 ) and the output shaft (GWA) by actuating the second shift element (B) and the third shift element (C);
a second gear results between the input shaft (GW 1 ) and the output shaft (GWA) in a first variant ( 2 . 1 ) by engaging the second shift element (B) and the fifth shift element (E), in a second variant ( 2 . 2 ) by actuating the first shift element (A) and the fifth shift element (E), in a third variant ( 2 . 3 ) by engaging the third shift element (C) and the fifth shift element (E), in a fourth variant ( 2 . 4 ) by actuating the first shift element (A) and the third shift element (C), and in a fifth variant ( 2 . 5 ) by engaging the fifth shift element (E); and
a third gear results between the input shaft (GW 1 ) and the output shaft (GWA) in a first variant ( 3 . 1 ) by engaging the second shift element (B) and the fourth shift element (D), in a second variant ( 3 . 2 ) by engaging the first shift element (A) and the fourth shift element (D), in a third variant ( 3 . 3 ) by actuating the third shift element (C) and the fourth shift element (D), and in a fourth variant ( 3 . 4 ) by engaging the fourth shift element (D).

4. The transmission (G) of claim 3 , further comprising a sixth shift element (F), wherein:
the sixth shift element (F), upon actuation, connects two of the three elements (E 11 , E 21 , E 31 ) of the first planetary gear set (P 1 ) to each other in a rotationally fixed manner,
the second gear also results between the input shaft (GW 1 ) and the output shaft (GWA) in a sixth variant ( 2 . 6 ) by engaging the fifth shift element (E) and the sixth shift element (F), in a seventh variant ( 2 . 7 ) by actuating the first shift element (A) and the sixth shift element (F), and in an eighth variant ( 2 . 8 ) by engaging the third shift element (C) and the sixth shift element (F), and
the third gear results between the input shaft (GW 1 ) and the output shaft (GWA) in a fifth variant ( 3 . 5 ) by actuating the fourth shift element (D) and the sixth shift element (F).

5. The transmission (G) of claim 2 , wherein the fourth shift element (D) and the fifth shift element (E) are combined to form a shift element pair (SP 1 ) with an associated actuating element, and wherein the actuating element is configured for actuating either the fourth shift element (D) or the fifth shift element (E) from a neutral position.

6. The transmission (G) of claim 5 , wherein the second shift element (D) and the sixth shift element (F) are combined to form a shift element pair (SP 2 ) with an associated actuating element, and wherein the actuating element is configured to actuate either the second shift element (B) or the sixth shift element (F) from a neutral position.

7. The transmission (G) of claim 1 , wherein the third element (E 32 ) of the second planetary gear set (P 2 ) is rotationally fixed to the output shaft (GWA), the first element (E 12 ) of the second planetary gear set (P 2 ) is rotationally fixable via the fourth shift element (D), and the first element (E 12 ) and the second element (E 22 ) of the second planetary gear set (P 2 ) or the second element (E 22 ) and the third element (E 32 ) of the second planetary gear set (P 2 ) are connectable to each other in a rotationally fixed manner with the fifth shift element (E).

8. The transmission (G) of claim 5 , wherein, by selectively engaging the first, second, third, fourth, and fifth elements (A, B, C, D, E):
a first gear ( 1 ) results between the input shaft (GW 1 ) and the output shaft (GWA) by actuating the second shift element (B) and the third shift element (C);
a second gear results between the input shaft (GW 1 ) and the output shaft (GWA) in a first variant ( 2 . 1 ) by engaging the second shift element (B) and the fifth shift element (E), in a second variant ( 2 . 2 ) by actuating the first shift element (A) and the fifth shift element (E), in a third variant ( 2 . 3 ) by engaging the third shift element (C) and the fifth shift element (E), in a fourth variant ( 2 . 4 ) by actuating the first shift element (A) and the third shift element (C), and in a fifth variant ( 2 . 5 ) by engaging the fifth shift element (E); and
a third gear results between the input shaft (GW 1 ) and the output shaft (GWA) in a first variant ( 3 . 1 ) by engaging the second shift element (B) and the fourth shift element (D), in a second variant ( 3 . 2 ) by engaging the first shift element (A) and the fourth shift element (D), in a third variant ( 3 . 3 ) by actuating the third shift element (C) and the fourth shift element (D), and in a fourth variant ( 3 . 4 ) by engaging the fourth shift element (D).

9. The transmission (G) of claim 7 , further comprising a sixth shift element (F), wherein:
the sixth shift element (F), upon actuation, connects two of the three elements (E 11 , E 21 , E 31 ) of the first planetary gear set (P 1 ) to each other in a rotationally fixed manner,
the second gear also results between the input shaft (GW 1 ) and the output shaft (GWA) in a sixth variant ( 2 . 6 ) by engaging the fifth shift element (E) and the sixth shift element (F), in a seventh variant ( 2 . 7 ) by actuati

Assignees

• Zahnradfabrik Friedrichshafen

Inventors

• Beck Stefan
• Kaltenbach Johannes
• Horn Matthias
• Warth Viktor
• Kutter Fabian
• Wechs Michael
• Griesmeier Uwe
• Moraw Jens
• Niederbrucker Gerhard

Classifications

• Y02T10/62

  Hybrid vehicles · CPC title

• B60K6/48

  Parallel type · CPC title

• B60K2006/4816

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

• F16H2200/0039

  the gear ratios comprising three forward speeds · CPC title

• F16H2200/2043

  with five engaging means · CPC title