Multi-speed transmission
First Claim
Patent Images
1. A transmission comprising:
- an input member;
an output member;
first, second, third and fourth planetary gear sets, wherein the first, second, and third planetary gear sets each include a first member, a second member, and a third member and the fourth planetary gear set includes only a first member and a second member each corresponding to one of a sun gear and a carrier member, and wherein the input member is continuously connected to the first member of the second planetary gear set;
three interconnecting members each connected directly to one of the first, second, and third planetary gear sets and to one other of the first, second, and third planetary gear sets; and
seven torque transmitting devices each selectively engageable to interconnect at least one of the first, second, third, and fourth planetary gear sets with at least one other of the first, second, third, and fourth planetary gear sets and a stationary member, andwherein the torque transmitting devices are selectively engageable in combinations of at least two to establish a plurality of 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. The torque transmitting devices include clutches and brakes including a selectable one-way clutch actuatable in combinations of two to establish a plurality of forward gear ratios and one reverse gear ratio.
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Citations
18 Claims
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1. A transmission comprising:
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an input member; an output member; first, second, third and fourth planetary gear sets, wherein the first, second, and third planetary gear sets each include a first member, a second member, and a third member and the fourth planetary gear set includes only a first member and a second member each corresponding to one of a sun gear and a carrier member, and wherein the input member is continuously connected to the first member of the second planetary gear set; three interconnecting members each connected directly to one of the first, second, and third planetary gear sets and to one other of the first, second, and third planetary gear sets; and seven torque transmitting devices each selectively engageable to interconnect at least one of the first, second, third, and fourth planetary gear sets with at least one other of the first, second, third, and fourth planetary gear sets and a stationary member, and wherein the torque transmitting devices are selectively engageable in combinations of at least two to establish a plurality of 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, 16, 17)
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18. A transmission comprising:
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an input member; an output member; first, second, and third planetary gear sets each having first, second and third members each corresponding to one of a sun gear, a ring gear, and a carrier member, and a fourth planetary gear set having only first and second members each corresponding to one of a sun gear and carrier member; a first interconnecting member continuously interconnecting the first member of the first planetary gear set with the second member of the second planetary gear set; a second interconnecting member continuously interconnecting the second member of the first planetary gear set with the third member of the third planetary gear set; a third interconnecting member continuously interconnecting the third member of the second planetary gear set with the second member of the third planetary gear set and the second member of the fourth planetary gear set; a plurality of torque transmitting devices 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, wherein one of the plurality of torque transmitting devices is a one-way clutch; and wherein the torque transmitting devices are selectively engageable in combinations of at least two to establish a plurality of forward speed ratios and at least one reverse speed ratio between the input member and the output member.
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Specification