Multi-speed transmission
First Claim
Patent Images
1. A transmission comprising:
- an input member,an output member;
a first and a second planetary gear set each having a first, a second, and a third member, wherein each of the first, second, and third members is included in one of a first rotary member, a second rotary member, a third rotary member, and a fourth rotary member, and wherein two of the members of the first planetary gear set are continuously separately connected with two of the members of the second planetary gear set to form two of the first, second, third, and fourth rotary members;
a third and a fourth planetary gear set each having a first, a second, and a third member, wherein each of the first, second, and third members is included in one of a fifth rotary member, a sixth rotary member, a seventh rotary member, and an eighth rotary member, and wherein two of the members of the third planetary gear set are continuously separately connected with two of the members of the fourth planetary gear set to form two of the fifth, sixth, seventh, and eighth rotary members;
a first coplanar gear set having a first member meshed with a second member, wherein the first member is continuously connected with the third rotary member and the second member of the first co-planar gear set is continuously connected with the eighth rotary member;
a second co-planar gear set having a first member meshed with a second member, wherein the first member is continuously connected with the first rotary member and the second member of the second co-planar gear set is separately selectively connectable with the fifth and seventh rotary members; and
six torque transmitting devices each selectively engageable to connect at least one of the first, second, third, fourth, fifth, sixth, seventh, and eighth rotary members with at least one other of a stationary member, the first and second members of the first and second co-planar gear sets, and the first, second, third, fourth, fifth, sixth, seventh, and eight rotary members, andwherein the torque transmitting devices are selectively engageable in combinations of at least two to establish at least nine forward speed ratios and at least one reverse speed ratio between the input member and the output member.
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Abstract
A transmission is provided having an input member, an output member, four planetary gear sets, a plurality of coupling members and a plurality of torque transmitting devices. Each of the planetary gear sets includes first, second and third members. The torque transmitting devices may include clutches and brakes.
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Citations
24 Claims
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1. A transmission comprising:
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an input member, an output member; a first and a second planetary gear set each having a first, a second, and a third member, wherein each of the first, second, and third members is included in one of a first rotary member, a second rotary member, a third rotary member, and a fourth rotary member, and wherein two of the members of the first planetary gear set are continuously separately connected with two of the members of the second planetary gear set to form two of the first, second, third, and fourth rotary members; a third and a fourth planetary gear set each having a first, a second, and a third member, wherein each of the first, second, and third members is included in one of a fifth rotary member, a sixth rotary member, a seventh rotary member, and an eighth rotary member, and wherein two of the members of the third planetary gear set are continuously separately connected with two of the members of the fourth planetary gear set to form two of the fifth, sixth, seventh, and eighth rotary members; a first coplanar gear set having a first member meshed with a second member, wherein the first member is continuously connected with the third rotary member and the second member of the first co-planar gear set is continuously connected with the eighth rotary member; a second co-planar gear set having a first member meshed with a second member, wherein the first member is continuously connected with the first rotary member and the second member of the second co-planar gear set is separately selectively connectable with the fifth and seventh rotary members; and six torque transmitting devices each selectively engageable to connect at least one of the first, second, third, fourth, fifth, sixth, seventh, and eighth rotary members with at least one other of a stationary member, the first and second members of the first and second co-planar gear sets, and the first, second, third, fourth, fifth, sixth, seventh, and eight rotary members, and wherein the torque transmitting devices are selectively engageable in combinations of at least two to establish at least nine forward speed ratios and at least one reverse speed ratio between the input member and the output member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A transmission comprising:
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an input member; an output member; first, second, third and fourth planetary gear sets each having first, second and third members, wherein the input member is continuously connected with the first member of the second planetary gear set and the output member is continuously connected with the second member of the fourth planetary gear set; a first interconnecting member continuously connecting the second member of the first planetary gear set with the second member of the second planetary gear set; a second interconnecting member continuously connecting the third member of the first planetary gear set with the third member of the second planetary gear set; a third interconnecting member continuously connecting the second member of the third planetary gear set with the second member of the fourth planetary gear set; a fourth interconnecting member continuously connecting the third member of the third planetary gear set with the third member of the fourth planetary gear set; a first co-planar gear set having a first member meshed with a second member, wherein the first member is continuously connected with the third member of the second planetary gear set and the second member of the first co-planar gear set is continuously connected with the first member of the third planetary gear set; a second co-planar year set having a first member meshed with a second member, wherein the first member is continuously connected with the first member of the second planetary gear set and the second member of the second co-planar gear set is selectively connectable to at least one of the members of the third and fourth planetary gear sets; and six torque, transmitting devises each selectively engageable to interconnect at least one of the first, second, and third members with at least one other of the first members, second members, third members, and a stationary member, and wherein the torque transmitting devices are selectively engageable in combinations of at least two to establish at least nine forward speed ratios and at least one reverse speed ratio between the input member and the output member. - View Dependent Claims (17, 18, 19, 20, 21)
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22. A transmission comprising;
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an input member; an output member; first, second, third, fourth planetary gear sets each having a sun gear, a carrier member, and a ring gear, wherein the input member is continuously connected with the sun gear of the second planetary gear set and the output member is continuously connected with the carrier member of the fourth planetary gear set; a first interconnecting member continuously connecting the ring gear of the first planetary gear set with the ring gear of the second planetary gear set; a second interconnecting member continuously connecting the carrier member of the first planetary gear set with the carrier member of the second planetary gear set; a third interconnecting member continuously connecting the ring gear of the third planetary gear set with the carrier member of the fourth planetary gear set; a fourth interconnecting member continuously connecting the carrier member of the third planetary gear set with the ring gear of the fourth planetary gear set; a first co-planar gear set having a first member meshed with a second member, wherein the first member is continuously connected with the carrier member of the second planetary gear set and the second member of the first co-planar gear set is continuously connected with the sun gear of the third planetary gear set; second co-planar gear set having a first member meshed with a second member, wherein the first Member is continuously connected with the sun gear of the second planetary gear set; a first torque transmitting device selectively engageable to connect the second member of the second co-planar gear set with the carrier member of the third planetary gear set; a second torque transmitting devise selectively engageable to connect the second member of the second co-planar gear set with the sun gear of the fourth planetary gear set; third torque transmitting device selectively engageable to connect the sun gear of the first planetary gear set with a stationary member; a fourth torque transmitting device selectively engageable to connect the ring gear of the first planetary gear set with the stationary member a fifth torque transmitting device selectively engageable to connect the carrier member of the first planetary gear set with the stationary member; and a sixth torque transmitting device selectively engageable to connect the carrier member of the third planetary gear set with the stationary member, and wherein the torque transmitting devices are selectively engageable in combinations of at least two to establish at least nine forward speed ratios and at least one reverse speed ratio between the input member and the output member. - View Dependent Claims (23, 24)
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Specification