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 each having first, second and third members;
a first interconnecting member continuously interconnecting the first member of the first planetary gear set with the first 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 fourth planetary gear set;
a third interconnecting member continuously interconnecting the third member of the second planetary gear set with the third member of the third planetary gear set;
a fourth interconnecting member continuously interconnecting the second member of the third planetary gear set with the second member of the fourth planetary gear set; and
six 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, and wherein the torque transmitting devices are selectively engageable in combinations of at least three to establish at least nine forward speed ratios and at least one reverse speed ratio between the input member and the output member and a first of the six torque transmitting device selectively engageable to interconnect the first member of the first planetary gear set and the first member of the second planetary gear set with the second member of the fourth planetary gear set, the second member of the third planetary gear set and the output member.
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Abstract
A transmission of the present invention has 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. The torque transmitting devices are each selectively engageable in combinations of at least three to establish at least nine forward speed ratios and at least one reverse speed ratio.
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Citations
19 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 each having first, second and third members; a first interconnecting member continuously interconnecting the first member of the first planetary gear set with the first 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 fourth planetary gear set; a third interconnecting member continuously interconnecting the third member of the second planetary gear set with the third member of the third planetary gear set; a fourth interconnecting member continuously interconnecting the second member of the third planetary gear set with the second member of the fourth planetary gear set; and six 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, and wherein the torque transmitting devices are selectively engageable in combinations of at least three to establish at least nine forward speed ratios and at least one reverse speed ratio between the input member and the output member and a first of the six torque transmitting device selectively engageable to interconnect the first member of the first planetary gear set and the first member of the second planetary gear set with the second member of the fourth planetary gear set, the second member of the third planetary gear set and the output member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. 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 interconnected with the second member of the second planetary gear set and output member is continuously interconnected with the second member of the third planetary gear set and with the second member of the fourth planetary gear set; a first interconnecting member continuously interconnecting the first member of the first planetary gear set with the first 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 fourth planetary gear set; a third interconnecting member continuously interconnecting the third member of the second planetary gear set with the third member of the third planetary gear set; a fourth interconnecting member continuously interconnecting the second member of the third planetary gear set with the second member of the fourth planetary gear set; a first torque transmitting device selectively engageable to interconnect the first member of the first planetary gear set and the first member of the second planetary gear set with the second member of the fourth planetary gear set, the second member of the third planetary gear set and the output member; a second torque transmitting device selectively engageable to interconnect the second member of the second planetary gear set and the input member with the first member of the fourth planetary gear set; a third torque transmitting device selectively engageable to interconnect the third member of the second planetary gear set and the third member of the third planetary gear set with the first member of the fourth planetary gear set; a fourth torque transmitting device selectively engageable to interconnect the first member of the third planetary gear set with the first member of the fourth planetary gear set; a fifth torque transmitting device selectively engageable to interconnect the first member of the first planetary gear set and the first member of the second planetary gear set with the stationary member; a sixth torque transmitting device selectively engageable to interconnect the third member of the first planetary gear set with the stationary member, and wherein the torque transmitting devices are each selectively engageable in combinations of at least three 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 (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 interconnected with the second member of the second planetary gear set and output member is continuously interconnected with the second member of the third planetary gear set and with the second member of the fourth planetary gear set; a first interconnecting member continuously interconnecting the first member of the first planetary gear set with the first 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 fourth planetary gear set; a third interconnecting member continuously interconnecting the third member of the second planetary gear set with the third member of the third planetary gear set; a fourth interconnecting member continuously interconnecting the second member of the third planetary gear set with the second member of the fourth planetary gear set; a first torque transmitting device selectively engageable to interconnect the third member of the first planetary gear set with the second member of the fourth planetary gear set, the second member of the third planetary gear set and the output member; a second torque transmitting device selectively engageable to interconnect the second member of the second planetary gear set and the input member with the first member of the fourth planetary gear set; a third torque transmitting device selectively engageable to interconnect the third member of the second planetary gear set and the third member of the third planetary gear set with the first member of the fourth planetary gear set; a fourth torque transmitting device selectively engageable to interconnect the first member of the third planetary gear set with the first member of the fourth planetary gear set; a fifth torque transmitting device selectively engageable to interconnect the first member of the first planetary gear set and the first member of the second planetary gear set with the stationary member; a sixth torque transmitting device selectively engageable to interconnect the third member of the first planetary gear set with the stationary member, and wherein the torque transmitting devices are each selectively engageable in combinations of at least three 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)
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18. 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 interconnected with the second member of the second planetary gear set and output member is continuously interconnected with the second member of the third planetary gear set and with the second member of the fourth planetary gear set; a first interconnecting member continuously interconnecting the first member of the first planetary gear set with the first 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 fourth planetary gear set; a third interconnecting member continuously interconnecting the third member of the second planetary gear set with the third member of the third planetary gear set; a fourth interconnecting member continuously interconnecting the second member of the third planetary gear set with the second member of the fourth planetary gear set; a first torque transmitting device selectively engageable to interconnect the second member of the first planetary gear set and the third member of the fourth planetary gear set with the second member of the second planetary gear set and the input member; a second torque transmitting device selectively engageable to interconnect the second member of the second planetary gear set and the input member with the first member of the fourth planetary gear set; a third torque transmitting device selectively engageable to interconnect the third member of the second planetary gear set and the third member of the third planetary gear set with the first member of the fourth planetary gear set; a fourth torque transmitting device selectively engageable to interconnect the first member of the third planetary gear set with the first member of the fourth planetary gear set; a fifth torque transmitting device selectively engageable to interconnect the first member of the first planetary gear set and the first member of the second planetary gear set with the stationary member; a sixth torque transmitting device selectively engageable to interconnect the third member of the first planetary gear set with the stationary member, and wherein the torque transmitting devices are each selectively engageable in combinations of at least three 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 (19)
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Specification