A multi-speed transmission includes an input member, an output member, a stationary member, and a first and a second compound planetary gear set. The first compound planetary gear set has a first, a second, a third, a fourth, and a fifth member. The second compound planetary gear set has a first, a second, a third, and a fourth member. The first member of the second compound planetary gear set is continuously connected for common rotation with the output member. An interconnecting member continuously connects the first member of the first planetary gear set for common rotation with the second member of the second planetary gear set. The transmission includes seven torque-transmitting mechanisms that are engagable to establish up to fifteen forward speed ratios between the input member and the output member.

Claims

16 · 2 independent · depth 3

16 granted claims

›1.independentA multi-speed transmission comprising:nan input member;an output member;a stationary member;a first and a second compound planetary gear set; wherein …+14

›2.↳ 1The multi-speed transmission of claim 1, wherein the input member is selectively connectable to the second and the third members of the first compound…d2+1

›4.↳ 1The multi-speed transmission of claim 1, wherein the fourth and the fifth members of the first compound planetary gear set are selectively grounded to…d2+1

›6.↳ 1The multi-speed transmission of claim 1, wherein the input member is selectively connected for common rotation with the third member of the second pla…d2

›7.↳ 1The multi-speed transmission of claim 1, wherein the second member of the second planetary gear set is selectively connected for common rotation with …d2

›8.↳ 1The multi-speed transmission of claim 1, wherein the fourth member of the second planetary gear set is grounded to the stationary member via engagemen…d2

›9.↳ 1The multi-speed transmission of claim 1, wherein three of the seven torque-transmitting mechanisms are band-type brakes which are selectively engagabl…d2

›10.↳ 1The multi-speed transmission of claim 1, wherein the first, the second, the third, the fourth, and the fifth members of the first compound planetary g…d2

›11.↳ 1The multi-speed transmission of claim 1, wherein the input member is selectively connectable to the second and the third members of the first compound…d2+4

›12.↳ 11The multi-speed transmission of claim 11, wherein one of the up to fifteen forward speed ratios is determined only by the second compound planetary ge…d3

›13.↳ 11The multi-speed transmission of claim 11, wherein one of the up to fifteen forward speed ratios is established by torque flow from the first compound …d3

›14.↳ 11The multi-speed transmission of claim 11, wherein one of the up to fifteen forward speed ratios is established by only the first compound planetary ge…d3

›15.↳ 11The multi-speed transmission of claim 11, wherein one of the up to fifteen forward speed ratios is established by both of the compound planetary gear …d3

›16.independentA multi-speed transmission comprising:nan input member;an output member;a stationary member;a first and a second compound planetary gear set; wherein …

A multi-speed transmission comprising:nan input member;an output member;a stationary member;a first and a second compound planetary gear set; wherein the first compound planetary gear set has a first, a second, a third, a fourth, and a fifth member; wherein the second compound planetary gear set has a first, a second, a third, and a fourth member; wherein the members of the planetary gear sets are sun gear members, ring gear members and carrier members; wherein the first member of the second compound planetary gear set is continuously connected for common rotation with the output member;an interconnecting member continuously connecting the first member of the first planetary gear set for common rotation with the second member of the second planetary gear set;seven selectively engagable torque-transmitting mechanisms;wherein the input member is selectively connectable to the second and the third members of the first compound planetary gear set via engagement of a first and a second of the seven torque-transmitting mechanisms, respectively;wherein the fourth and the fifth members of the first compound planetary gear set are selectively grounded to the stationary member via engagement of a third and a fourth of the seven torque-transmitting mechanisms, respectively;wherein the input member is selectively connected for common rotation with the third member of the second planetary gear set via engagement of a fifth of the seven torque-transmitting mechanisms;wherein the second member of the second planetary gear set is selectively connected for common rotation with the third member of the second planetary gear set via engagement of a sixth of the seven torque-transmitting mechanisms; andwherein the fourth member of the second planetary gear set is grounded to the stationary member via engagement of a seventh of the seven torque-transmitting mechanisms, the seven torque-transmitting mechanisms being engagable in combinations of three to establish up to fifteen forward speed ratios and a reverse speed ratio between the input member and the output member.

Classifications

2 codes

IPC · International Patent Classification

Section F — Mechanical engineering; lighting; heating; weapons

F16H3/62

USPC · US Patent Classification

475/275

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2.5 y

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non-final + final

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no RCE

Examiner

Dirk Wright

art unit 3655 · TC 3600

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›Priority documents — 1

Type	Document	Date
related publication	US 20110207574 A1	25 Aug 2011

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