Transmission for a motor vehicle

Patent metadata

Field	Value
Publication number	US-10598259-B2
Application number	US-201616060535-A
Country	US
Kind code	B2
Filing date	Nov 22, 2016
Priority date	Dec 23, 2015
Publication date	Mar 24, 2020
Grant date	Mar 24, 2020

Abstract

The invention relates to a transmission (G) for a motor vehicle, wherein the transmission (G) comprises an input shaft (GW 1 ), an output shaft (GW 2 ), three planetary gear sets (P 1 , P 2 , P 3 ), as well as at least five shift elements (B 1 , K 1 , K 2 , K 3 , K 4 ), wherein, by means of selective engagement of the at least five shift elements (B 1 , K 1 , K 2 , K 3 , K 4 ), seven forward gears ( 1 to 7 ) can be selected between the input shaft (GW 1 ) and the output shaft (GW 2 ), and a drive train for a motor vehicle comprising such a transmission (G).

First claim

The invention claimed is:

1. A transmission ( 1 ) for a motor vehicle, comprising:
an input shaft (GW 1 );
an output shaft (GW 2 );
a plurality of planetary gear sets (P 1 , P 2 , P 3 ) with a first planetary gear set (P 1 ), a second planetary gear set (P 2 ) and a third planetary gear set (P 3 ), each of the plurality of planetary gear sets (P 1 , P 2 , P 3 ) comprises a first element (E 11 , E 12 , E 13 ), a second element (E 21 , E 22 , E 23 ) and a third element (E 31 , E 32 , E 33 ) which are utilized for guiding a power flow from the input shaft (GW 1 ) to the output shaft (GW 2 ), the first, second and third elements each being a respective one of a sun gear, a ring gear, and a planet carrier;
a plurality of shift elements (B 1 , K 1 , K 2 , K 3 , K 4 ) 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 (K 4 ), selective actuation of the plurality of shift elements coupling the plurality of planetary gear sets (P 1 , P 2 , P 3 ) while selecting different forward gears ( 1 to 7 ) between the input shaft (GW 1 ) and the output shaft (GW 2 ),
wherein the first element (E 11 ) of the first planetary gear set (P 1 ) is permanently rotationally fixed, and the second element (E 21 ) of the first planetary gear set (P 1 ) is connected to the input shaft (GW 1 ),
wherein the third element (E 31 ) of the first planetary gear set (P 1 ) is connectable in a rotationally fixed manner to the first element (E 12 ) of the second planetary gear set (P 2 ) by the fourth shift element (K 3 ), and the first element (E 12 ) of the second planetary gear set (P 2 ) is fixable in a rotationally fixed manner to a housing (GG) of the transmission (G) by the first shift element (B 1 ),
wherein the second planetary gear set (P 2 ) is interlockable with the fifth shift element (K 4 ),
wherein the third element (E 32 ) of the second planetary gear set (P 2 ) is connectable in a rotationally fixed manner to the input shaft (GW 1 ) by the second shift element (K 1 ), the third element (E 32 ) of the second planetary gear set (P 2 ) is also connectable in a rotationally fixed manner to the second element (E 23 ) of the third planetary gear set (P 3 ) by the third shift element (K 2 ), and the second element (E 23 ) of the second planetary gear set (P 2 ) is coupled in a rotationally fixed manner to the output shaft (GW 2 ), and
wherein the first element (E 13 ) of the third planetary gear set (P 3 ) is connected in a rotationally fixed manner to the input shaft (GW 1 ).

2. The transmission (G) of claim 1 , wherein the second element (E 22 ) of the second planetary gear set (P 2 ) is permanently connected in a rotationally fixed manner to the third element (E 33 ) of the third planetary gear set (P 3 ).

3. The transmission (G) of claim 2 , wherein:
a first forward gear ( 1 ) is selectable by actuating the first shift element (B 1 ) and the fifth shift element (K 4 );
a second forward gear ( 2 ) is selectable by actuating the first shift element (B 1 ) and the third shift element (K 2 );
a third forward gear ( 3 ) is selectable by actuating the first shift element (B 1 ) and the second shift element (K 1 );
a fourth forward gear ( 4 . 1 ; 4 . 2 ; 4 . 3 ) is selectable by actuating the second shift element (K 1 ) and the third shift elements (K 2 ), by actuating the second shift element (K 1 ) and the fifth shift element (K 4 ) or by actuating the third shift element (K 2 ) and the fifth shift element (K 4 );
a fifth forward gear ( 5 ) is selectable by actuating the second shift element (K 1 ) and the fourth shift element (K 3 );
a sixth forward gear ( 6 ) is selectable by actuating the third shift element (K 2 ) and the fourth shift element (K 3 ); and
a seventh forward gear ( 7 ) is selectable by actuating the fourth shift element (K 3 ) and the fifth shift element (K 4 ).

4. The transmission (G) of claim 1 , wherein the plurality of shift elements includes a sixth shift element (K 5 ) and a seventh shift element (B 2 ), wherein:
the second element (E 22 ) of the second planetary gear set (P 2 ) is connectable in a rotationally fixed manner to the third element (E 33 ) of the third planetary gear set (P 3 ) by the sixth shift element (K 5 ); and
the second element (E 22 ) of the second planetary gear set (P 2 ) is fixable to the housing (GG) by the seventh shift element (B 2 ).

5. The transmission (G) of claim 4 , wherein:
a first forward gear ( 1 ) is selectable by actuating the first shift element (B 1 ), the fifth shift element (K 4 ), and the sixth shift element (K 5 );
a second forward gear ( 2 ) is selectable by actuating the first shift element (B 1 ), the third shift element (K 2 ), and the sixth shift element (K 5 );
a third forward gear ( 3 ) is selectable by actuating the first shift element (B 1 ), the second shift element (K 1 ), and the sixth shift element (K 5 );
a fourth forward gear ( 4 . 1 ; 4 . 2 ; 4 . 3 ) is selectable by actuating the second shift element (K 1 ), the third shift element (K 2 ), and the sixth shift element (K 5 ), by actuating the second shift element (K 1 ), the fifth shift element (K 4 ), and the sixth shift element (K 5 ) or by actuating the third shift element (K 2 ), the fifth shift element (K 4 ), and the sixth shift element (K 5 );
a fifth forward gear ( 5 ) is selectable by actuating the second shift element (K 1 ), the fourth shift element (K 3 ), and the sixth shift element (K 5 );
a sixth forward gear ( 6 ) is selectable by actuating the third shift element (K 2 ), the fourth shift element (K 3 ), and the sixth shift element (K 5 );
a seventh forward gear ( 7 ) is selectable by actuating the fourth shift element (K 3 ), the fifth shift element (K 4 ), and the sixth shift element (K 5 ); and
a reverse gear (R 1 ) is selectable by actuating the third shift element (K 2 ), the fourth shift element (K 3 ), and the seventh shift element (B 2 ).

6. The transmission (G) of claim 1 , wherein:
the fifth shift element (K 4 ) couples the first element (E 12 ) of the second planetary gear set (P 2 ) to the second element (E 22 ) of the second planetary gear set (P 2 ) in a rotationally fixed manner upon actuation of the fifth shift element (K 4 );
the fifth shift element (K 4 ) couples the first element (E 12 ) of the second planetary gear set (P 2 ) to the third element (E 32 ) of the second planetary gear set (P 2 ) in a rotationally fixed manner upon actuation of the fifth shift element (K 4 ); or
the fifth shift element (K 4 ) couples the second element (E 22 ) of the second planetary gear set (P 2 ) to the third element (E 32 ) of the second planetary gear set (P 2 ) in a rotationally fixed manner upon actuation of the fifth shift element (K 4 ).

7. The transmission (G) of claim 1 , further comprising an electric motor (EM), a rotor (R) of the electric motor (EM) coupled in a rotationally fixed manner to one of the first, second and third elements (E 11 , E 12 , E 13 , E 21 , E 22 , E 23 , E 31 , E 32 , E 33 ) of the plurality of planetary gear sets (P 1 , P 2 , P 3 ).

8. The transmission (G) of claim 7 , wherein the rotor (R) is coupled to the third element (E 31 ) of the first planetary gear set (P 1 ).

9. The transmission (G) of claim 1 , further comprising a separating clutch (K 0 ), the input shaft (GW 1 ) couplable in a rotationally fixed manner to a connecting shaft (AN) by the separating clutch (K 0 ).

10. The transmission (G) of claim 1 , wherein one or more of the plurality of planetary gear sets (P 1 , P 2 , P 3 ) is a minus planetary gear set with the respective first element (E 11 , E 12 , E 13 ) corresponding to the sun gear, the respective second elemen

Assignees

• Zahnradfabrik Friedrichshafen

Inventors

• Warth Viktor
• Griesmeier Uwe
• Brehmer Martin
• Ziemer Peter
• Kaltenbach Johannes
• Beck Stefan
• Kuberczyk Raffael
• Wechs Michael
• Scharr Stephan
• Münch Eckehard
• Knöpke Bernd
• Horn Matthias
• Moraw Jens
• King Julian
• Pawlakowitsch Juri
• Niederbrucker Gerhard

Classifications

• F16H2200/2043

  with five engaging means · CPC title

• B60K6/365

  with the gears having orbital motion · CPC title

• F16H3/66 Primary

  composed of a number of gear trains without drive passing from one train to another · CPC title

• F16H2200/2097

  comprising an orbital gear set member permanently connected to the housing, e.g. a sun wheel permanently connected to the housing · CPC title

• F16H2200/201

  with three sets of orbital gears · CPC title