Multi-speed transmission

• US 10,267,385 B2
• Filed: 05/10/2017
• Issued: 04/23/2019
• Est. Priority Date: 09/09/2015
• Status: Active Grant

• Current Assignee: Allison Transmission Incorporated (Allison Transmission Holdings Incorporated)
• Original Assignee: Allison Transmission Incorporated (Allison Transmission Holdings Incorporated)
• Inventors: Mueller, Joerg, Resch, Rico, Leesch, Mirko
• Primary Examiner(s): Holmes, Justin
• Application Number:
  US15/591,303
• Publication Number:
  US 20170241515A1
• Time in Patent Office: 713 Days
• Field of Search: None
• CPC Class Codes: F16H 2003/445 without permanent connection between the input and the set of orbital gears
• CPC Class Codes: F16H 2200/0069 the gear ratios comprising ten forward speeds
• CPC Class Codes: F16H 2200/0078 the gear ratio comprising twelve or more forward speeds
• CPC Class Codes: F16H 2200/0086 the gear ratios comprising two reverse speeds
• CPC Class Codes: F16H 2200/2012 with four sets of orbital gears
• CPC Class Codes: F16H 2200/2046 with six engaging means
• CPC Class Codes: F16H 2200/2097 comprising an orbital gear set member permanently connected to the housing, e.g. a sun wheel permanently connected to the housing
• CPC Class Codes: F16H 3/66 composed of a number of gear trains without drive passing from one train to another
• CPC Class Codes: F16H 61/0059 Braking of gear output shaft using simultaneous engagement of friction devices applied for different gear ratios

Abstract

The present disclosure provides a multiple speed transmission having an input member, an output member, a plurality of planetary gearsets, a plurality of interconnecting members and a plurality of torque-transmitting mechanisms. Each of the plurality of planetary gearsets includes a sun gear, a ring gear, and a carrier member with pinion gears. The input member is selectively interconnected with at least one member of one of the plurality of planetary gear sets, and the output member is continuously interconnected with another member of one of the plurality of planetary gear sets. At least ten forward speeds and one reverse speed are achieved by the selective engagement of the plurality of torque-transmitting mechanisms.

Claims

1. A multiple speed transmission, comprising:

an input member;

an output member;

first, second, third and fourth planetary gearsets each having first, second and third members;

a plurality of interconnecting members each connected to at least one of the first, second, third, and fourth planetary gearsets;

a first torque-transmitting mechanism selectively engageable to interconnect the second member of the first planetary gearset, the first member of the second planetary gearset, and the third member of the third planetary gearset with a stationary member;

a second torque-transmitting mechanism selectively engageable to interconnect the second member of the second planetary gearset and the second member of the third planetary gearset with the stationary member;

a third torque-transmitting mechanism selectively engageable to interconnect the third member of the first planetary gearset with the stationary member;

a fourth torque-transmitting mechanism selectively engageable to interconnect the first member of the first planetary gearset with the second member of the second planetary gearset and the second member of the third planetary gearset;

a fifth torque-transmitting mechanism selectively engageable to interconnect the first member of the first planetary gearset with the first member of the fourth planetary gearset; and

a sixth torque-transmitting mechanism selectively engageable to interconnect the first member of the third planetary gearset with the first member of the fourth planetary gearset;

wherein the torque transmitting mechanisms are selectively engageable in combinations of at least three to establish at least ten forward speed ratios and at least one reverse speed ratio between the input member and the output member.

2. The multiple speed transmission of claim 1, wherein the input member is continuously interconnected with the first member of the first planetary gearset, and the output member is continuously interconnected with the second member of the fourth planetary gearset.

3. The multiple speed transmission of claim 1, wherein the plurality of interconnecting members includes a first interconnecting member continuously interconnecting the second member of the first planetary gearset with the first member of the second planetary gearset and the third member of the third planetary gearset.

4. The multiple speed transmission of claim 1, wherein the plurality of interconnecting members includes a second interconnecting member continuously connected to the third member of the first planetary gearset.

5. The multiple speed transmission of claim 1, wherein the plurality of interconnecting members includes a third interconnecting member continuously interconnecting the second member of the second planetary gearset with the second member of the third planetary gearset.

6. The multiple speed transmission of claim 1, wherein the plurality of interconnecting members includes a fourth interconnecting member continuously interconnecting the third member of the second planetary gearset with the third member of the fourth planetary gearset.

7. The multiple speed transmission of claim 1, wherein the plurality of interconnecting members includes a fifth interconnecting member continuously connected to the first member of the third planetary gearset.

8. The multiple speed transmission of claim 1, wherein the plurality of interconnecting members includes a sixth interconnecting member continuously connected to the first member of the fourth planetary gearset.

9. The multiple speed transmission of claim 1, wherein when shifting from at least one forward speed ratio into one of a successive higher and a successive lower forward speed ratio causes at least one of the first, the second, the third, the fourth, the fifth and the sixth torque transmitting mechanisms to disengage and at least one of the first, the second, the third, the fourth, the fifth, and the sixth torque transmitting mechanisms to engage.

10. A multiple speed transmission, comprising:

an input member;

an output member;

first, second, third and fourth planetary gearsets each having a sun gear, a carrier member, and a ring gear;

a plurality of interconnecting members each connected to at least one of the first, second, third, and fourth planetary gearsets;

a first torque-transmitting mechanism selectively engageable to interconnect the carrier member of the first planetary gearset, the sun gear of the second planetary gearset, and the ring gear of the third planetary gearset with a stationary member;

a second torque-transmitting mechanism selectively engageable to interconnect the carrier member of the second planetary gearset and the carrier member of the third planetary gearset with the stationary member;

a third torque-transmitting mechanism selectively engageable to interconnect the ring gear of the first planetary gearset with the stationary member;

a fourth torque-transmitting mechanism selectively engageable to interconnect the sun gear of the first planetary gearset with the carrier member of the second planetary gearset and the carrier member of the third planetary gearset;

a fifth torque-transmitting mechanism selectively engageable to interconnect the sun gear of the first planetary gearset with the sun gear of the fourth planetary gearset; and

a sixth torque-transmitting mechanism selectively engageable to interconnect the sun gear of the third planetary gearset with the sun gear of the fourth planetary gearset;

wherein the torque transmitting mechanisms are selectively engageable in combinations of at least three to establish at least ten forward speed ratios and at least one reverse speed ratio between the input member and the output member.

11. The multiple speed transmission of claim 10, wherein the input member is continuously interconnected with the sun gear of the first planetary gearset, and the output member is continuously interconnected with the carrier member of the fourth planetary gearset.

12. The multiple speed transmission of claim 10, wherein the plurality of interconnecting members includes a first interconnecting member continuously interconnecting the carrier member of the first planetary gearset with the sun gear of the second planetary gearset and the ring gear of the third planetary gearset.

13. The multiple speed transmission of claim 10, wherein the plurality of interconnecting members includes a second interconnecting member continuously connected to the ring gear of the first planetary gearset.

14. The multiple speed transmission of claim 10, wherein the plurality of interconnecting members includes a third interconnecting member continuously interconnecting the carrier member of the second planetary gearset with the carrier member of the third planetary gearset.

15. The multiple speed transmission of claim 10, wherein the plurality of interconnecting members includes a fourth interconnecting member continuously interconnecting the ring gear of the second planetary gearset with the ring gear of the fourth planetary gearset.

16. The multiple speed transmission of claim 10, wherein the plurality of interconnecting members includes a fifth interconnecting member continuously connected to the sun gear of the third planetary gearset.

17. The multiple speed transmission of claim 10, wherein the plurality of interconnecting members includes a sixth interconnecting member continuously connected to the sun gear of the fourth planetary gearset.

18. The multiple speed transmission of claim 10, wherein when shifting from at least one forward speed ratio into one of a successive higher and a successive lower forward speed ratio causes at least one of the first, the second, the third, the fourth, the fifth and the sixth torque transmitting mechanisms to disengage and at least one of the first, the second, the third, the fourth, the fifth, and the sixth torque transmitting mechanisms to engage.

19. A multiple speed transmission, comprising:

an input member;

an output member;

first, second, third and fourth planetary gearsets each having a sun gear, a carrier member, and a ring gear;

a plurality of interconnecting members each connected to at least one of the first, second, third, and fourth planetary gearsets;

a first torque-transmitting mechanism selectively engageable to interconnect the carrier member of the first planetary gearset, the sun gear of the second planetary gearset, and the ring gear of the third planetary gearset with a stationary member;

a second torque-transmitting mechanism selectively engageable to interconnect the carrier member of the second planetary gearset and the carrier member of the third planetary gearset with the stationary member;

a third torque-transmitting mechanism selectively engageable to interconnect the ring gear of the first planetary gearset with the stationary member;

a fourth torque-transmitting mechanism selectively engageable to interconnect the sun gear of the first planetary gearset with the carrier member of the second planetary gearset and the carrier member of the third planetary gearset;

a fifth torque-transmitting mechanism selectively engageable to interconnect the sun gear of the first planetary gearset with the sun gear of the fourth planetary gearset;

a sixth torque-transmitting mechanism selectively engageable to interconnect the sun gear of the third planetary gearset with the sun gear of the fourth planetary gearset;

a first interconnecting member of the plurality of interconnecting members continuously interconnecting the carrier member of the first planetary gearset with the sun gear of the second planetary gearset and the ring gear of the third planetary gearset;

a second interconnecting member of the plurality of interconnecting members continuously connected to the ring gear of the first planetary gearset;

a third interconnecting member of the plurality of interconnecting members continuously interconnecting the carrier member of the second planetary gearset with the carrier member of the third planetary gearset;

a fourth interconnecting member of the plurality of interconnecting members continuously interconnecting the ring gear of the second planetary gearset with the ring gear of the fourth planetary gearset;

a fifth interconnecting member of the plurality of interconnecting members continuously connected to the sun gear of the third planetary gearset; and

a sixth interconnecting member of the plurality of interconnecting members continuously connected to the sun gear of the fourth planetary gearset;

wherein the torque transmitting mechanisms are selectively engageable in combinations of at least three to establish at least ten forward speed ratios and at least one reverse speed ratio between the input member and the output member.

20. The multiple speed transmission of claim 19, wherein the input member is continuously interconnected with the sun gear of the first planetary gearset, and the output member is continuously interconnected with the carrier member of the fourth planetary gearset.