Multi-speed transmission
First Claim
Patent Images
1. A powertrain comprising:
- a housing having a first end wall;
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 first member of the second planetary gear set;
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;
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 fifth interconnecting member continuously interconnecting the third member of the third planetary gear set with the third member of the fourth planetary gear set; and
seven 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 the fourth planetary gear set is disposed adjacent the first end wall of the housing, the third planetary gear set is adjacent the fourth planetary gear set, the second planetary gear set is adjacent the third planetary gear set, and the first planetary gear set is adjacent the second planetary gear set, 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. Each of the planetary gear sets includes first, second and third members. The torque transmitting devices include clutches and brakes actuatable in combinations of two to establish a plurality of forward gear ratios and one reverse gear ratio.
10 Citations
18 Claims
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1. A powertrain comprising:
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a housing having a first end wall; 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 first member of the second planetary gear set; 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; 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 fifth interconnecting member continuously interconnecting the third member of the third planetary gear set with the third member of the fourth planetary gear set; and seven 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 the fourth planetary gear set is disposed adjacent the first end wall of the housing, the third planetary gear set is adjacent the fourth planetary gear set, the second planetary gear set is adjacent the third planetary gear set, and the first planetary gear set is adjacent the second planetary gear set, 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)
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17. A powertrain comprising:
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a housing having a first end wall; 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 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; 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 fifth interconnecting member continuously interconnecting the third member of the third planetary gear set with the third member of the fourth planetary gear set; a first torque transmitting device selectively engageable to interconnect the first member of the third planetary gear set with the input member; a second torque transmitting device selectively engageable to interconnect the third member of the second planetary gear set, the second member of the fourth planetary gear set, and the second member of the third planetary gear set with the first member of the second planetary gear set and the input member; a third torque transmitting device selectively engageable to interconnect the second member of the fourth planetary gear set, the second member of the third planetary gear set, and the third member of the second 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 stationary member; a fifth torque transmitting device selectively engageable to interconnect the first member of the fourth 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; a seventh torque transmitting device selectively engageable to interconnect the second member of the fourth planetary gear set, the second member of the third planetary gear set, and the third member of the second planetary gear set with the stationary member, wherein the fourth planetary gear set is disposed adjacent the first end wall of the housing, the third planetary gear set is adjacent the fourth planetary gear set, the second planetary gear set is adjacent the third planetary gear set, and the first planetary gear set is adjacent the second planetary gear set, and the first, second, fourth, and fifth clutches are disposed between the fourth planetary gear set and the first end wall, 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 (18)
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Specification