Six-speed front-transverse double-clutch transmission with third counter shaft

Patent metadata

Field	Value
Publication number	US-11846342-B2
Application number	US-201917413254-A
Country	US
Kind code	B2
Filing date	Nov 15, 2019
Priority date	Dec 14, 2018
Publication date	Dec 19, 2023
Grant date	Dec 19, 2023

Abstract

A transmission where a first shaft is rotationally fixable to a third shaft and to a second shaft, the second and third shafts are rotationally connectable to a fourth shaft, the second shaft is rotationally connectable to a fifth shaft, the fourth shaft is rotationally connectable to the fifth shaft, the third shaft is rotationally connectable to the fifth shaft, fixed gears of the fourth and fifth shafts are rotationally connected to a drive output, a first gearwheel of the sixth shaft meshes with a fixed gear of the second shaft, and a second gearwheel of the sixth shaft meshes with a fixed gear of the third shaft. Moreover, a first gearwheel of the sixth shaft is an idler gear and a second gearwheel of the sixth shaft is a fixed gear, or vice versa. Additionally, the idler gear of the sixth shaft is rotationally fixable to the sixth shaft.

First claim

The invention claimed is:

1. A transmission ( 101 , 201 , 301 ), comprising:
a plurality of shafts comprising a first shaft (W 1 ), a second shaft (W 2 ), a third shaft (W 3 ), a fourth shaft (W 4 ), a fifth shaft (W 5 ), and a sixth shaft (W 6 );
a plurality of shift elements comprising a first shift element (K 1 ), a second shift element (K 2 ), a third shift element (A), a fourth shift element (B), a fifth shift element (C), a sixth shift element (D), a seventh shift element (E), an eighth shift element (F), and a ninth shift element (G); and
a drive output,
wherein the first shaft (W 1 ) is connectable to the third shaft (W 3 ) in a rotationally fixed manner via the first shift element (K 1 ),
wherein the first shaft (W 1 ) is connectable to the second shaft (W 2 ) in a rotationally fixed manner via the second shift element (K 2 ),
wherein the second shaft (W 2 ) is rotationally connectable to the fourth shaft (W 4 ) via the third shift element (A),
wherein the third shaft (W 3 ) is rotationally connectable to the fourth shaft (W 4 ) via the fourth shift element (B),
wherein the third shaft (W 3 ) is rotationally connectable to the fourth shaft (W 4 ) via the fifth shift element (C),
wherein the second shaft (W 2 ) is rotationally connectable to the fifth shaft (W 5 ) via the sixth shift element (D),
wherein the fourth shaft (W 4 ) is rotationally connectable to the fifth shaft (W 5 ) via at least the seventh shift element (E),
wherein the third shaft (W 3 ) is rotationally connectable to the fifth shaft (W 5 ) via the eighth shift element (F),
wherein a fixed gear (F 4 ) of the fourth shaft (W 4 ) and a fixed gear (F 5 ) of the fifth shaft (W 5 ) are both rotationally connected to the drive output,
wherein a fixed gear of the second shaft (W 2 ) meshes with a first gearwheel of the sixth shaft (W 6 ), with a first idler gear (L 4 . 1 ) of the fourth shaft (W 4 ), and a first idler gear (L 5 . 1 ) of the fifth shaft (W 5 ),
wherein a second gearwheel of the sixth shaft (W 6 ) and a fixed gear of the third shaft (W 3 ) mesh,
wherein the first gearwheel of the sixth shaft (W 6 ) is an idler gear (L 6 ) and the second gearwheel of the sixth shaft (W 6 ) is a fixed gear (F 6 ), or the first gearwheel of the sixth shaft (W 6 ) is the fixed gear (F 6 ) and the second gearwheel of the sixth shaft (W 6 ) is the idler gear (L 6 ), and
wherein the idler gear (L 6 ) of the sixth shaft (W 6 ) is connectable to the sixth shaft (W 6 ) in a rotationally fixed manner via the ninth shift element (G).

2. The transmission ( 101 , 201 , 301 ) of claim 1 , wherein the fixed gear of the second shaft (W 2 ) that meshes with the first gearwheel of the sixth shaft (W 6 ), the first idler gear (L 4 . 1 ) of the fourth shaft (W 4 ), and the first idler gear (L 5 . 1 ) of the fifth shaft (W 5 ) is a first fixed gear (F 2 ) of the second shaft (W),
wherein the first idler gear (L 4 . 1 ) of the fourth shaft (W 4 ) is connectable to the fourth shaft (W 4 ) in a rotationally fixed manner via the third shift element (A),
wherein the first idler gear (L 5 . 1 ) of the fifth shaft (W 5 ) is connectable to the fifth shaft (W 5 ) in a rotationally fixed manner via the sixth shift element (D),
wherein a first fixed gear (F 3 . 1 ) of the third shaft (W 3 ) is rotationally connected to a second idler gear (L 4 . 2 ) of the fourth shaft (W 4 ),
wherein the second idler gear (L 4 . 2 ) of the fourth shaft (W 4 ) is connectable to the fourth shaft (W 4 ) in a rotationally fixed manner via the fourth shift element (B),
wherein the second idler gear (L 4 . 2 ) of the fourth shaft (W 4 ) is rotationally connected to a second idler gear (L 5 . 2 ) of the fifth shaft (W 5 ),
wherein the second idler gear (L 5 . 2 ) of the fifth shaft (W 5 ) is connectable to the fifth shaft (W 5 ) in a rotationally fixed manner via the seventh shift element (E),
wherein a second fixed gear (F 3 . 2 ) of the third shaft (W 3 ) is rotationally connected to a third idler gear (L 4 . 3 ) of the fourth shaft (W 4 ) and to a third idler gear (L 5 . 3 ) of the fifth shaft (W 5 ),
wherein the third idler gear (L 4 . 3 ) of the fourth shaft (W 4 ) is connectable to the fourth shaft (W 4 ) in a rotationally fixed manner via the fifth shift element (C),
wherein the third idler gear (L 5 . 3 ) of the fifth shaft (W 5 ) is connectable to the fifth shaft (W 5 ) in a rotationally fixed manner via the eighth shift element (F), and
wherein the fixed gear of the third shaft (W 3 ) that meshes with the second gearwheel of the sixth shaft (W 6 ) is the first fixed gear (F 3 . 1 ) of the third shaft (W 3 ), the second fixed gear (F 3 . 2 ) of the third shaft (W 3 ), or a third fixed gear of the third shaft (W 3 ).

3. A method for shifting the transmission ( 101 , 201 , 301 ) of claim 1 , the method comprising:
implementing a first gear ratio by engaging the second shift element (K 2 ), the ninth shift element (G), and the fourth shift element (B);
implementing a second gear ratio by engaging the first shift element (K 1 ) and the fourth shift element (B);
implementing a third gear ratio by engaging the second shift element (K 2 ) and the sixth shift element (D);
implementing a fourth gear ratio by engaging the first shift element (K 1 ) and the eighth shift element (F);
implementing a fifth gear ratio by engaging the second shift element (K 2 ) and the third shift element (A); and
implementing a sixth gear ratio by engaging the first shift element (K 1 ) and the fifth shift element (C).

4. The method of claim 3 , further comprising implementing a reverse gear ratio by engaging the second shift element (K 2 ), the fourth shift element (B), the seventh shift element (E), and the ninth shift element (G).

5. The method of claim 3 , further comprising implementing a reverse gear ratio by engaging the first shift element (K 1 ), the fourth shift element (B), and the seventh shift element (E).

Assignees

• Zahnradfabrik Friedrichshafen

Inventors

• Bachmann Max
• Rosemeier Thomas
• Roske Michael
• Reisch Matthias
• Kaltenbach Johannes
• Beck Stefan
• Wechs Michael
• Rattay Martin
• Pawlakowitsch Juri
• Kutter Fabian

Classifications

• F16H3/093 Primary

  with two or more countershafts · CPC title

• F16H3/006 Primary

  power being selectively transmitted by parallel flow paths, e.g. dual clutch transmissions · CPC title

• F16H2003/0822

  characterised by the arrangement of at least one reverse gear · CPC title

• F16H2003/0826

  wherein at least one gear on the input shaft, or on a countershaft is used for two different forward gear ratios · CPC title

• F16H2200/0056

  the gear ratios comprising seven forward speeds · CPC title