Multi-speed transmission

Patent metadata

Field	Value
Publication number	US-2016333983-A1
Application number	US-201615149257-A
Country	US
Kind code	A1
Filing date	May 9, 2016
Priority date	May 15, 2015
Publication date	Nov 17, 2016
Grant date	—

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 continuously 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.

First claim

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 between at least one of the first, second, third, and fourth planetary gearsets and at least another of the first, second, third, and fourth planetary gearsets; a first torque-transmitting mechanism selectively engageable to interconnect the third member of the third planetary gearset and the second member of the fourth planetary gearset with a stationary member; a second torque-transmitting mechanism selectively engageable to interconnect the first member of the second planetary gearset with the first member of the third planetary gearset; a third torque-transmitting mechanism selectively engageable to interconnect the first member of the second planetary gearset with the first member of the first planetary gearset; 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, the second member of the third planetary gearset, and the output member; a fifth torque-transmitting mechanism selectively engageable to interconnect the first member of the first planetary gearset with the third member of the third planetary gearset and the second member of the fourth planetary gearset; a sixth torque-transmitting mechanism selectively engageable to interconnect the second member of the first planetary gearset and the third member of the fourth planetary gearset with the second member of the third planetary gearset, the second member of the second planetary gearset, and the output member; wherein the torque-transmitting mechanisms are selectively engageable in combinations of at least two 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 second planetary gearset, and the output member is continuously interconnected with the second member of the second planetary gearset and the second member of the third planetary gearset.

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

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

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

9 . The multiple speed transmission of claim 1 , wherein the torque-transmitting mechanisms are selectively engageable in combinations of at least two to establish at least two reverse speed ratios between the input member and the output member.

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

11 . 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 between at least one of the first, second, third, and fourth planetary gearsets and at least another of the first, second, third, and fourth planetary gearsets; a first torque-transmitting mechanism selectively engageable to interconnect the ring gear of the third planetary gearset and the carrier member of the fourth planetary gearset with a stationary member; a second torque-transmitting mechanism selectively engageable to interconnect the sun gear of the second planetary gearset with the sun gear of the third planetary gearset; a third torque-transmitting mechanism selectively engageable to interconnect the sun gear of the second planetary gearset with the sun gear of the first planetary gearset; 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 ring gear of the third planetary gearset and the carrier member of the fourth planetary gearset; a sixth torque-transmitting mechanism selectively engageable to interconnect the carrier member of the first planetary gearset and the ring gear of the fourth planetary gearset with the carrier member of the third planetary gearset, the carrier member of the second planetary gearset, and the output member; wherein the torque-transmitting mechanisms are selectively engageable in combinations of at least two to establish at least ten forward speed ratios and at least one reverse speed ratio between the input member and the output member.

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

13 . The multiple speed transmission of claim 11 , wherein the plurality of interconnecting members includes a first interconnecting member continuously connected to the sun gear of the first planetary gearset.

14 . The multiple speed transmission of claim 11 , wherein the plurality of interconnecting members includes a second interconnecting member continuously interconnecting the ring gear of the third planetary gearset with the carrier member of the fourth planetary gearset.

15 . The multiple speed transmission of claim 11 , wherein the plurality of interconnecting members includes a third interconnecting member continuously interconnecting the carrier member of the first planetary gearset with the ring gear of the fourth planetary gearset.

16 . The multiple speed transmission of claim 11 , wherein the plurality of interconnecting members includes a fou

Assignees

• Allison Transm Inc

Inventors

• Briceno Jorge
• Mccauley Phillip F

Classifications

• 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

• F16H2200/2046

  with six engaging means · CPC title

• F16H2200/0069

  the gear ratios comprising ten forward speeds · CPC title

• F16H2200/2012

  with four sets of orbital gears · CPC title

• F16H3/66 Primary

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