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 third member of the first planetary gear set with the third member of the fourth 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 first member of the first planetary gear set with the second member of the second planetary gear set;
a fourth interconnecting member continuously interconnecting the third member of the second planetary gear set with the second member of the third planetary gear set;
a fifth interconnecting member continuously interconnecting the first member of the second planetary gear set with the second member of the fourth planetary gear set; and
seven torque transmitting mechanisms each selectively engageable to interconnect at least one of the first, second, and third members with at least one other of the first, second, third members and a stationary member, andwherein the seven torque transmitting mechanisms are selectively engageable in combinations of at least two to establish at least eleven forward speed ratios and at least one reverse speed ratio between the input member and the output member.
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Accused Products
Abstract
A transmission is provided having an input member, an output member, at least 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 at least eleven forward gear ratios and one reverse gear ratio.
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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; first, second, third, and fourth planetary gear sets each having first, second, and third members; a first interconnecting member continuously interconnecting the third member of the first planetary gear set with the third member of the fourth 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 first member of the first planetary gear set with the second member of the second planetary gear set; a fourth interconnecting member continuously interconnecting the third member of the second planetary gear set with the second member of the third planetary gear set; a fifth interconnecting member continuously interconnecting the first member of the second planetary gear set with the second member of the fourth planetary gear set; and seven torque transmitting mechanisms each selectively engageable to interconnect at least one of the first, second, and third members with at least one other of the first, second, third members and a stationary member, and wherein the seven torque transmitting mechanisms are selectively engageable in combinations of at least two to establish at least eleven 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, 18)
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19. A transmission comprising:
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a stationary member; a first planetary gear set having a first sun gear member, a first planetary gear carrier member, and a first ring gear member; a second planetary gear set having a second sun gear member, a second planetary gear carrier member, and a second ring gear member; a third planetary gear set having a third sun gear member, a third planetary gear carrier member, and a third ring gear member; a fourth planetary gear set having a fourth sun gear member, a fourth planetary gear carrier member, and a fourth ring gear member; an input member continuously connected for common rotation with the second sun gear member and the fourth planetary gear carrier member; an output member continuously connected for common rotation with the first planetary gear carrier member and the third ring gear member; a first interconnecting member continuously interconnecting the first sun gear member with the fourth sun gear member; a second interconnecting member continuously interconnecting the first ring gear member with the second planetary gear carrier member; a third interconnecting member continuously interconnecting the second ring gear member with the third planetary gear carrier member; a first clutch selectively engageable to interconnect the third sun gear member with the input member, the second sun gear member, and the fourth planetary gear carrier member; a second clutch selectively engageable to interconnect the third planetary gear carrier member and the second ring gear member with the input member, the second sun gear member, and the fourth planetary gear carrier member; a third clutch selectively engageable to interconnect the third planetary gear carrier member and the second ring gear member with the output member, the third ring gear member, and the first planetary gear carrier member; a first brake selectively engageable to interconnect the third sun gear member with the stationary member; a second brake selectively engageable to interconnect the third planetary gear carrier member and the second ring gear member with the stationary member; a third brake selectively engageable to interconnect the first sun gear member and the fourth sun gear member with the stationary member; and a fourth brake selectively engageable to interconnect the fourth ring gear member with the stationary member, wherein the first, second, and third clutches and the first, second, third, and fourth brakes are selectively engageable in combinations of at least two to establish at least twelve forward speed ratios and at least one reverse speed ratio between the input member and the output member.
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20. A transmission comprising:
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a stationary member; a first planetary gear set having a first sun gear member, a first planetary gear carrier member, and a first ring gear member; a second planetary gear set having a second sun gear member, a second planetary gear carrier member, and a second ring gear member; a third planetary gear set having a third sun gear member, a third planetary gear carrier member, and a third ring gear member; a fourth planetary gear set having a fourth sun gear member, a fourth planetary gear carrier member, and a fourth ring gear member; an input member continuously connected for common rotation with the second sun gear member and the fourth planetary gear carrier member; an output member continuously connected for common rotation with the first planetary gear carrier member and the third ring gear member; a first interconnecting member continuously interconnecting the first sun gear member with the fourth sun gear member; a second interconnecting member continuously interconnecting the first ring gear member with the second planetary gear carrier member; a third interconnecting member continuously interconnecting the second ring gear member with the third planetary gear carrier member; a first clutch selectively engageable to interconnect the third sun gear member with the input member, the second sun gear member, and the fourth planetary gear carrier member; a second clutch selectively engageable to interconnect the third planetary gear carrier member and the second ring gear member with the input member, the second sun gear member, and the fourth planetary gear carrier member; a third clutch selectively engageable to interconnect the third planetary gear carrier member and the second ring gear member with the third sun gear member; a first brake selectively engageable to interconnect the third sun gear member with the stationary member; a second brake selectively engageable to interconnect the third planetary gear carrier member and the second ring gear member with the stationary member; a third brake selectively engageable to interconnect the first sun gear member and the fourth sun gear member with the stationary member; and a fourth brake selectively engageable to interconnect the fourth ring gear member with the stationary member, wherein the first, second, and third clutches and the first, second, third, and fourth brakes are selectively engageable in combinations of at least two to establish at least twelve forward speed ratios and at least one reverse speed ratio between the input member and the output member.
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Specification