Multi-speed transmission with external drive gearsets
First Claim
Patent Images
1. A transmission comprising:
- an input member;
an output member;
a first, second, and third planetary gear set each having a first, second, and third member;
a first, second, third, and fourth co-planar gear set each having a first gear intermeshed with a second gear;
a first torque transmitting mechanism selectively engageable to interconnect the second gear of the third co-planar gear set with at least one of the second member of the first planetary gear set and the input member;
a second torque transmitting mechanism selectively engageable to interconnect at least one of the third member of the first planetary gear set and the first gear of the second co-planar gear set with the second gear of the third co-planar gear set;
a third torque transmitting mechanism selectively engageable to interconnect the first gear of the first co-planar gear set with the third member of the third planetary gear set;
a fourth torque transmitting mechanism selectively engageable to interconnect the third member of the third planetary gear set with the second member of the second planetary gear set; and
a fifth torque transmitting mechanism selectively engageable to interconnect at least one of the second gear of the first co-planar gear set and the first member of the first planetary gear set with a stationary element,wherein the torque transmitting mechanisms are selectively engageable in combinations of at least three to establish at least eight 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, three planetary gear sets, four external 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. Each of the external gear sets includes first and second gears. The torque transmitting devices may include clutches and brakes.
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Citations
20 Claims
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1. A transmission comprising:
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an input member; an output member; a first, second, and third planetary gear set each having a first, second, and third member; a first, second, third, and fourth co-planar gear set each having a first gear intermeshed with a second gear; a first torque transmitting mechanism selectively engageable to interconnect the second gear of the third co-planar gear set with at least one of the second member of the first planetary gear set and the input member; a second torque transmitting mechanism selectively engageable to interconnect at least one of the third member of the first planetary gear set and the first gear of the second co-planar gear set with the second gear of the third co-planar gear set; a third torque transmitting mechanism selectively engageable to interconnect the first gear of the first co-planar gear set with the third member of the third planetary gear set; a fourth torque transmitting mechanism selectively engageable to interconnect the third member of the third planetary gear set with the second member of the second planetary gear set; and a fifth torque transmitting mechanism selectively engageable to interconnect at least one of the second gear of the first co-planar gear set and the first member of the first planetary gear set with a stationary element, wherein the torque transmitting mechanisms are selectively engageable in combinations of at least three to establish at least eight 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)
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13. An apparatus comprising:
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an input member; an output member; a first, second, and third planetary gear set each having a first, second, and third member, wherein the input member is continuously interconnected with the second member of the first planetary gear set; a first, second, third, and fourth gear set each having a first gear intermeshed with a second gear, wherein the output member is continuously interconnected with the second gear of the fourth gear set; a first torque transmitting mechanism selectively engageable to interconnect the second gear of the third gear set with at least one of the second member of the first planetary gear set and the input member; a second torque transmitting mechanism selectively engageable to interconnect at least one of the third member of the first planetary gear set and the first gear of the second gear set with the second gear of the third gear set; a third torque transmitting mechanism selectively engageable to interconnect the first gear of the first gear set with the third member of the third planetary gear set; a fourth torque transmitting mechanism selectively engageable to interconnect the third member of the third planetary gear set with the second member of the second planetary gear set; and a fifth torque transmitting mechanism selectively engageable to interconnect at least one of the second gear of the first gear set and the first member of the first planetary gear set with a stationary element, wherein the torque transmitting mechanisms are selectively engageable in combinations of at least three to establish at least eight forward speed ratios and at least one reverse speed ratio between the input member and the output member. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification