Transmission for a vehicle

Patent metadata

Field	Value
Publication number	US-10378616-B2
Application number	US-201715785951-A
Country	US
Kind code	B2
Filing date	Oct 17, 2017
Priority date	Oct 26, 2016
Publication date	Aug 13, 2019
Grant date	Aug 13, 2019

Abstract

A transmission (G) for a motor vehicle includes an in-order-of-rotation-speed fourth shaft (W 4 ) permanently connected to a transmission output (GW 2 -A), an in-order-of-rotation-speed first shaft (W 1 ) either fixable by engaging a first shift element (B 1 ) or connectable in a rotationally fixed manner with a transmission input (GW 1 -A) by actuating a second shift element (K 1 ), an in-order-of-rotation-speed second shaft (W 2 ) connectable in a rotationally fixed manner with the transmission input (GW 1 -A) by actuating a third shift element (K 2 ), an in-order-of-rotation-speed third shaft (W 3 ) is connectable in a rotationally fixed manner with the transmission input (GW 1 -A) by actuating a fourth shift element (K 3 ), and an in-order-of-rotation-speed fifth shaft (W 5 ) fixable by engaging a fifth shift element (B 2 ).

First claim

The invention claimed is:

1. A transmission (G) for a motor vehicle, comprising:
a transmission input (GW 1 -A);
a transmission output (GW 2 -A);
a main gear set (HS) having two planetary gear sets (P 1 , P 2 );
a plurality of shift elements with a first shift element (B 1 ), a second shift element (K 1 ), a third shift element (K 2 ), a fourth shift element (K 3 ) and a fifth shift element shift element (B 2 ); and
an upstream gear set (VS) having a planetary gear set (P 3 ) with a plurality of elements (E 13 , E 23 , E 33 ; E 13 ′, E 23 ′, E 33 ′; E 13 ″, E 23 ″, E 33 ″) including a ring gear (HO 3 ), a planetary carrier (ST 3 ) and a sun gear (SO 3 ),
wherein the main gear set (HS) includes exactly five shafts, designated in order of rotation speed as the first shaft (W 1 ), the second shaft (W 2 ), the third shaft (W 3 ), the fourth shaft (W 4 ) and the fifth shaft (W 5 ),
wherein the in-order-of-rotation-speed fourth shaft (W 4 ) is permanently connected to the transmission output (GW 2 -A),
wherein the in-order-of-rotation-speed first shaft (W 1 ) is either fixable by engaging the first shift element (B 1 ) or connectable in a rotationally fixed manner with the transmission input (GW 1 -A) by actuating the second shift element (K 1 );
wherein the in-order-of-rotation-speed second shaft (W 2 ) is connectable in a rotationally fixed manner with the transmission input (GW 1 -A) by actuating the third shift element (K 2 ),
wherein the in-order-of-rotation-speed third shaft (W 3 ) is connectable in a rotationally fixed manner with the transmission input (GW 1 -A) by actuating the fourth shift element (K 3 ), and
wherein the in-order-of-rotation-speed fifth shaft (W 5 ) is fixable by engaging the fifth shift element (B 2 ).

2. The transmission (G) of claim 1 , wherein:
six forward gears ( 1 to 6 ) are selectable between the transmission input (GW 1 -A) and the transmission output (GW 2 -A) by engagement of two of the five shift elements (B 1 , K 1 , K 2 , K 3 , B 2 );
a first forward gear ( 1 ) is shiftable by engaging the second shift element (K 1 ) and the fifth shift element (B 2 );
a second forward gear ( 2 ) is shiftable by engaging the third shift element (K 2 ) and the fifth shift element (B 2 );
a third forward gear ( 3 ) is shiftable by engaging the fourth shift element (K 3 ) and the fifth shift element (B 2 );
a fourth forward gear ( 4 . 1 , 4 . 2 , 4 . 3 ) is shiftable by engaging the second shift element (K 1 ) and the fourth shift element (K 3 ), by engaging the second shift element (K 1 ) and the third shift element (K 2 ), or by engaging the third shift element (K 2 ) and the fourth shift element (K 3 );
a fifth forward gear ( 5 ) is shiftable by engaging the first shift element (B 1 ) and the fourth shift element (K 3 );
and a sixth forward gear ( 6 ) is shiftable by engaging the first shift element (B 1 ) and the third shift element (K 2 ).

3. The transmission (G) of claim 1 , further comprising a sixth shift element (B 3 ), wherein the in-order-of-rotation-speed third shaft (W 3 ) is fixable by engaging the sixth shift element (B 3 ).

4. The transmission (G) of claim 3 , wherein at least one reverse gear (R 1 , R 2 ) is selectable between the transmission input (GW 1 -A) and the transmission output (GW 2 -A) by engaging the sixth shift element (B 3 ) and either the second shift element (K 1 ) or the third shift element (K 2 ).

5. The transmission (G) of claim 3 , wherein the fifth shift element (B 2 ) and the sixth shift element (B 3 ) are combined to form a dual shift element (SE).

6. The transmission (G) of claim 1 , wherein:
a first planetary gear set (P 1 ) of the main gear set (HS) comprises at least one planetary gear (PR 1 ), a sun gear (SO 1 ) and a ring gear (HO 1 );
the at least one planetary gear (PR 1 ) meshed with both the sun gear (SO 1 ) and the ring gear (HO 1 ) of the first planetary gear set (P 1 );
each of the at least one planetary gear (PRI) of the first planetary gear set (P 1 ) coupled in a rotationally fixed manner to a respective radially inner planetary gear (PR 12 ) of a second planetary gear set (P 2 ) of the main gear set (HS);
the respective radially inner planetary gear (P 12 ) meshed with a sun gear (SO 2 ) of the second planetary gear set (P 2 ) and a respective radially outer planetary gear (PR 22 ) of the second planetary gear set (P 2 ); and
the respective radially outer planetary gear (PR 22 ) meshed with a ring gear (HO 2 ) of the second planetary gear set (P 2 ).

7. The transmission (G) of claim 6 , wherein each of the at least one planetary gear (PR 1 ) of the first planetary gear set (P 1 ) and the respective radially inner planetary gear (PR 12 ) of the second planetary gear set (P 2 ) are combined to form one stepped planetary gear.

8. The transmission (G) of claim 6 , wherein:
the in-order-of-rotation-speed first shaft (W 1 ) is connected to the sun gear (SO 1 ) of the first planetary gear set (P 1 ) in a rotationally fixed manner;
the in-order-of-rotation-speed second shaft (W 2 ) is connected in a rotationally fixed manner to the sun gear (SO 2 ) of the second planetary gear set (P 2 );
the in-order-of-rotation-speed third shaft (W 3 ) is connected in a rotationally fixed manner to the ring gear (HO 2 ) of the second planetary gear set (P 2 );
the in-order-of-rotation-speed fourth shaft (W 4 ) is connected in a rotationally fixed manner to a planetary carrier (ST), which rotationally supports both the at least one planetary gear (PR 1 ) of the first planetary gear set (P 1 ) and the planetary gears (PR 12 , PR 22 ) of the second planetary gear set (P 2 ); and
the in-order-of-rotation-speed fifth shaft (W 5 ) is connected to the ring gear (HO 1 ) of the first planetary gear set (P 1 ) in a rotationally fixed manner.

9. The transmission (G) of claim 1 , wherein one or more of the plurality of shift elements (B 1 , K 1 , K 2 , K 3 , B 2 , B 3 ) is a force-locking shift element.

10. The transmission (G) of claim 1 , wherein one or more of the second shift element (K 1 ), the fifth shift element (B 2 ) and the sixth shift element (B 3 ) is a positive-locking shift element.

11. The transmission (G) of claim 1 , further comprising an electric motor (EM) and a rotatable component, a rotor (R) of the electric motor (EM) coupled with the rotatable component.

12. The transmission (G) of claim 11 , wherein the rotor (R) is coupled with the transmission input (GW 1 -A).

13. The transmission (G) of claim 1 , further comprising a disconnect clutch (K 0 ) and a connecting shaft (AN), the drive shaft (GW 1 -A) connectable in a rotationally fixed manner to the connecting shaft (AN) via the disconnect clutch (K 0 ).

14. The transmission (G) of claim 1 , wherein the first element (E 13 ) of the planetary gear set (P 3 ) is connected in a rotationally fixed manner to the transmission input (GW 1 -A), the second element (E 23 ) of the planetary gear set (P 3 ) is connected in a rotationally fixed manner to the in-order-of-rotation-speed first shaft (W 1 ) of the main gear set (HS), and the third element (E 33 ) of the planetary gear set (P 3 ) is fixable by an additional shift element (B 4 ).

15. The transmission (G) of claim 1 , wherein the first element (E 13 ′) of the planetary gear set (P 3 ) is connected in a rotationally fixed manner to the transmission input (GW 1 -A), the second element (E 23 ) of the planetary gear set (P 3 ) is fixed, and the third element (E 33 ′) of the planetary gear set (P 3 ) is connectable to the in-order-of-rotation-speed first shaft (W 1 ) of the main gear set (HS) by an additional shift element (K 4 ).

Assignees

• Zahnradfabrik Friedrichshafen

Inventors

• Warth Viktor
• Wechs Michael
• Beck Stefan

Classifications

• F16H2200/0091

  the gear ratios comprising three reverse speeds · CPC title

• F16H2200/2048

  with seven engaging means · CPC title

• F16H2200/2046

  with six engaging means · CPC title

• F16H2200/0052

  the gear ratios comprising six forward speeds · CPC title

• B60K2006/381

  characterized by driveline brakes · CPC title