Nine speed automatic transmission

Patent metadata

Field	Value
Publication number	US-9291244-B2
Application number	US-201414157632-A
Country	US
Kind code	B2
Filing date	Jan 17, 2014
Priority date	Jan 17, 2014
Publication date	Mar 22, 2016
Grant date	Mar 22, 2016

Abstract

Transmissions with at least four gearing-arrangements and six clutches that produce nine forward speeds and one reverse. The gearing-arrangements may be simple planetary gearsets. The six clutches may include one to three brakes, and at least one clutch is an input clutch and one an output clutch. The input-shaft of each transmission may be associated with a carrier of one of the simple planetary gearsets. The input-shaft may be associated with carrier- 1 . The output-shaft of some transmissions may be associated with a carrier of another of the simple planetary gearsets. The output-shaft may be associated with carrier- 4 . Sun and ring gears in gearing-arrangements may be connected to a transmission housing. Sun- 3 and ring- 4 may be grounds.

First claim

What is claimed is:

1. A transmission comprising:
four gearing-arrangements GA- 1 , GA- 2 , GA- 3 , and GA- 4 and six clutches C- 1 , C- 2 , C- 3 , C- 4 , C- 5 , and C- 6 , wherein GA- 1 is configured to fixedly impose a linear speed relationship (LSR) among a shaft- 1 , an input-shaft and a shaft- 2 , GA- 2 is configured to fixedly impose a LSR among shaft- 2 , a shaft- 3 , and a shaft- 4 , C- 1 is configured to selectively couple the input-shaft to shaft- 3 , C- 2 is configured to selectively couple shaft- 2 to an output-shaft, and C- 3 is configured to selectively couple shaft- 1 to shaft- 3 .

2. The transmission of claim 1 wherein GA- 1 is a planetary gearset (PG) having a sun- 1 , carrier- 1 and ring- 1 respectively associated with shaft- 1 , the input-shaft and shaft- 2 .

3. The transmission of claim 1 wherein GA- 2 is a planetary gearset having a sun- 2 , carrier- 2 and ring- 2 respectively associated with shaft- 2 , shaft- 3 and shaft- 4 .

4. The transmission of claim 1 wherein C- 4 is a brake configured to selectively couple shaft- 1 to a ground.

5. The transmission of claim 1 wherein GA- 3 and C- 5 are configured to selectively impose an overdrive speed relationship from shaft- 4 to shaft- 3 .

6. The transmission of claim 5 wherein GA- 3 is configured to impose a LSR among a shaft- 5 , shaft- 4 and shaft- 3 and C- 5 is a brake configured to selectively couple shaft- 5 to a ground.

7. The transmission of claim 6 wherein GA- 3 is a planetary gearset having a sun- 3 , carrier- 3 and ring- 3 respectively associated with shaft- 5 , shaft- 4 and shaft- 3 .

8. The transmission of claim 1 wherein GA- 4 and C- 6 are configured to selectively impose an overdrive speed relationship from the output-shaft to shaft- 2 .

9. The transmission of claim 8 wherein GA- 4 is configured to impose a LSR among a shaft- 4 , the output-shaft and shaft- 6 and C- 6 is a brake configured to selectively couple shaft- 6 to a ground.

10. The transmission of claim 9 wherein GA- 4 is a planetary gearset having a sun- 4 , carrier- 4 and ring- 4 respectively associated with shaft- 4 , the output-shaft and shaft- 6 .

11. A transmission comprising:
four planetary gearsets PG- 1 , PG- 2 , PG- 3 , and PG- 4 and six clutches including C- 1 , C- 2 , C- 3 , and C- 4 , wherein PG- 1 has a sun- 1 , carrier- 1 and ring- 1 , carrier- 1 being associated with an input-shaft, PG- 2 has a sun- 2 , carrier- 2 and ring- 2 , sun- 2 being associated with ring- 1 , C- 1 is configured to selectively couple carrier- 1 to carrier- 2 , C- 2 is configured to selectively couple sun- 2 to an output-shaft, and C- 3 is configured to selectively couple sun- 1 to carrier- 2 .

12. The transmission of claim 11 wherein C- 4 is configured to selectively couple sun- 1 to a ground.

13. The transmission of claim 12 wherein PG- 3 has a sun- 3 , carrier- 3 associated with ring- 2 , and ring- 3 associated with carrier- 2 .

14. The transmission of claim 13 wherein the six clutches includes C- 5 which is configured to selectively couple sun- 3 to the ground.

15. The transmission of claim 14 wherein PG- 4 has a sun- 4 associated with ring- 2 and carrier- 3 , a carrier- 4 associated with an output-shaft, and a ring- 4 .

16. The transmission of claim 15 wherein the six clutches includes C- 6 which is configured to selectively couple ring- 4 to the ground.

17. A transmission comprising:
four gearing-arrangements GA- 1 , GA- 2 , GA- 3 , and GA- 4 and six clutches C- 1 , C- 2 , C- 3 , C- 4 , C- 5 , and C- 6 , wherein GA- 1 is configured to fixedly impose a linear speed relationship (LSR) among a shaft- 1 , an input-shaft and a shaft- 2 , GA- 2 is configured to fixedly impose a LSR among shaft- 2 , a shaft- 3 , and a shaft- 4 , GA- 3 is configured to fixedly impose a LSR among shaft- 3 , shaft- 4 and a shaft- 5 , and GA- 4 is configured to fixedly impose a LSR among shaft- 4 , an output-shaft and a shaft- 6 , wherein C- 2 is configured to selectively couple shaft- 2 to an output-shaft.

18. The transmission of claim 17 wherein C- 1 is configured to selectively couple the input-shaft to shaft- 3 .

19. The transmission of claim 17 wherein C- 3 is configured to selectively couple shaft- 1 to shaft- 3 .

20. The transmission of claim 17 wherein C- 4 is configured to selectively couple shaft- 1 to a ground.

21. The transmission of claim 17 wherein C- 5 is configured to selectively couple shaft- 5 to a ground.

22. The transmission of claim 17 wherein C- 6 is configured to selectively couple shaft- 6 to a ground.

Assignees

• Ford Global Tech Llc

Inventors

• Lippert Robert Scott

Classifications

• F16H2200/2012

  with four sets of orbital gears · CPC title

• F16H2200/2046

  with six engaging means · CPC title

• F16H3/62 Primary

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

• F16H2200/0065

  the gear ratios comprising nine forward speeds · CPC title