Transmission for a motor vehicle

Patent metadata

Field	Value
Publication number	US-11028904-B2
Application number	US-201816607387-A
Country	US
Kind code	B2
Filing date	Mar 26, 2018
Priority date	Apr 24, 2017
Publication date	Jun 8, 2021
Grant date	Jun 8, 2021

Abstract

A transmission (G) for a motor vehicle. The transmission (G) comprises a transmission input (GW1-A), a transmission output (GW2-A), first, second, third and fourth planetary gearsets (P1, P2, P3, P4) and first, second, third, fourth, fifth and sixth shift elements (B1, B2, K1, K2, K3, K4). Ten forward gears and one reverse gear can be achieved between the transmission input (GW1-A) and the transmission output (GW2-A) by selectively operating the six shift elements (B1, B2, K1, K2, K3, K4). A drive train for a motor vehicle having such a transmission (G) is also disclosed.

First claim

The invention claimed is:

1. A transmission for a motor vehicle, the transmission comprising:
a transmission input,
a transmission output,
a first planetary gearset,
a second planetary gearset,
a third planetary gearset,
a fourth planetary gearset,
the first, the second, the third and the fourth planetary gearsets each comprising a plurality of elements, a first element of the respective planetary gearsets being formed as a sun gear, a second element of the respective planetary gearsets being formed as a planetary carrier, in a case of a minus planetary gearset, and as a ring gear, in a case of a plus planetary gearset, and a third element of the respective planetary gearsets being formed as the ring gear, in the case of the minus planetary gearset, and as the planetary carrier, in the case of the plus planetary gearset,
a first shift element,
a second shift element,
a third shift element,
a fourth shift element,
a fifth shift element,
a sixth shift element,
selective actuation of four of the first, the second, the third, the fourth, the fifth, and the sixth shift elements implementing different flow paths of power on the first, the second, the third, and the fourth planetary gearsets by achieving different gears ratios between the transmission input and transmission output;
the first element of the first planetary gearset and the first element of the second planetary gearset being rotatably fixed with one another and being jointly fixable, via the first shift element, to a non-rotating component;
the third element of the first planetary gearset being fixable, via the second shift element, to the non-rotating component;
the second element of the first planetary gearset and the third element of the fourth planetary gearset being permanently rotatably fixed with one another;
the transmission input being rotatably fixed with the second element of the second planetary gearset;
the transmission output being rotatably fixed with the second element of the fourth planetary gearset;
the second element of the first planetary gearset and the third element of the fourth planetary gearset both being jointly rotatably fixable, via the third shift element, with the third element of the second planetary gearset; and
the third elements of the second and the third planetary gearsets are either permanently rotatably fixed with one another or are rotatably fixable with one another by engagement of at least one of the fifth and the fourth shift elements.

2. The transmission according to claim 1 , wherein the third element of the third planetary gearset is rotatably fixable by engagement of the fourth shift element with a shaft,
the shaft is rotatably fixable by engagement of the fifth shift element with the third element of the second planetary gearset, and, by engagement of the sixth shift element, the shaft is rotatably fixed with the first element of the third planetary gearset and the first element of the fourth planetary gearset, and
the second element of the third planetary gearset is rotatably fixed with the transmission input.

3. The transmission according to claim 1 , wherein the second element of the third planetary gearset is rotatably fixable, by engagement of the fourth shift element, with the transmission input,
the first element of the third planetary gearset is rotatably engaged with the first element of the fourth planetary gearset,
the third element of the third planetary gearset is rotatably engaged, by engagement of the fifth shift element, with the third element of the second planetary gearset, and
the third planetary gearset is blocked by engagement of the sixth shift element.

4. The transmission according to claim 3 , wherein engagement of the sixth shift element rotatably fixes either:
the first element and the third element of the third planetary gearset,
the first element and the second element of the third planetary gearset, or
the second element and the third element of the third planetary gearset with one another.

5. The transmission according to claim 1 , wherein the second element of the third planetary gearset is rotatably fixed by engagement of the fourth shift element with the transmission input,
the third element of the third planetary gearset is rotatably fixed with the third element of the second planetary gearset,
the first element of the third planetary gearset is rotatably fixable by engagement of the fifth shift element with the first element of the fourth planetary gearset, and
the first element of the fourth planetary gearset is rotatably fixable with the second element of the third planetary gearset by engagement of the sixth shift element.

6. The transmission according to claim 1 , wherein the second element of the third planetary gearset is rotatably fixed with the transmission input,
the first element of the third planetary gearset is rotatably fixable with the first element of the fourth planetary gearset by engagement of the fourth shift element,
the first element of the fourth planetary gearset is rotatably fixable by engagement of the sixth shift element with the third element of the third planetary gearset, and
the third element of the third planetary gearset is rotatably fixable by engagement of the fifth shift element with the third element of the second planetary gearset.

7. The transmission according to claim 1 , wherein a first forward gear is implemented by engagement of the first, the second, the fourth and the sixth shift elements,
a second forward gear is implemented by engagement of the first, the second, the fifth and the sixth shift elements,
a third forward gear is implemented by engagement of the second, the fourth, the fifth and the sixth shift elements,
a fourth forward gear is implemented by engagement of the second, the third, the fifth and the sixth shift elements,
a fifth forward gear is implemented by engagement of the second, the third, the fourth and the sixth shift elements,
a sixth forward gear is implemented by engagement of the second, the third, the fourth and the fifth shift elements,
a seventh forward gear is implemented by engagement of the third, the fourth, the fifth and the sixth shift elements,
an eighth forward gear is implemented by engagement of the first, the third, the fourth and the fifth shift elements,
a ninth forward gear is implemented by engagement of the first, the third, the fourth and the sixth shift elements,
a tenth forward gear is implemented by engagement of the first, the third, the fifth and the sixth shift elements, and
a reverse gear is implemented by engagement of the first, the second, the fourth and the fifth shift elements.

8. The transmission according to claim 1 , wherein the first, the second, the third and the fourth planetary gearsets are minus planetary gearsets; and
the first elements of the third and the fourth planetary gearsets are either permanently rotatably fixed with one another or are rotatably fixable with one another by engagement of one of the fifth and the fourth shift elements.

9. The transmission according to claim 1 , wherein the first planetary gearset is a plus planetary gearset, and the second, the third and the fourth planetary gearsets are each minus planetary gearsets.

10. The transmission according to claim 1 , wherein the transmission input is formed at a drive shaft and the transmission output is formed at an output shaft, and the drive shaft and the output shaft are coaxial to each other.

11. The transmission according to claim 1 , wherein at least one of the first, the second, the third, the fourth, the fifth and the six shift elements is a force-locking shift element.

12. The transmissio

Assignees

• Zahnradfabrik Friedrichshafen

Inventors

• Beck Stefan
• Kaltenbach Johannes
• Wechs Michael
• Trübenbach Michael
• Bornträger Kai
• Glückler Johannes
• Moraw Jens
• Niederbrucker Gerhard
• Ziemer Peter

Classifications

• F16H2200/2094

  using positive clutches, e.g. dog clutches · CPC title

• F16H2200/0069

  the gear ratios comprising ten forward speeds · CPC title

• F16H3/62 Primary

  Gearings having three or more central gears (F16H3/68 - F16H3/78 take precedence) · CPC title

• F16H2200/2012

  with four sets of orbital gears · CPC title

• B60K6/365

  with the gears having orbital motion · CPC title