Compact multi-speed automatic transmission
First Claim
1. A multiple speed automatic transmission comprising, in combination,a first, a second, a third and a fourth planetary gear assembly, each of said planetary gear assemblies having three members,an input member,an output member connected to one of said members of said first planetary gear assembly,a first member for connecting said one of said members of said second planetary gear assembly with one of said members of said fourth planetary gear assembly,a second member for connecting one of said members of said third planetary gear assembly with said one of said members of said fourth planetary gear assembly,a third member for connecting another of said members of said first planetary gear assembly with another of said members of said second planetary gear assembly,a fourth member for connecting another member of said third planetary gear assembly with said another of said members of said fourth planetary gear assembly,a fifth member for connecting yet another of said members of said first planetary gear assembly with yet another of said members of said second planetary gear assembly, anda plurality of torque transmitting devices selectively engageable to connect:
- said input shaft to said fourth member, said input shaft to yet another of said members of said third planetary gear assembly, said input shaft to said another member of said second planetary gear assembly, said input shaft to said fifth member, yet another of said members of said fourth planetary gear assembly to ground, said another of said members of said first planetary gear assembly to ground and said yet another of said members of said third planetary gear assembly to ground.
3 Assignments
0 Petitions
Accused Products
Abstract
An automatic transmission includes an input shaft, an output shaft and four planetary gear assemblies each having a first, a second and a third element. The automatic transmission includes six fixed or rigid interconnections: one from a third element of the second planetary gear assembly to a second element of the fourth planetary gear assembly, one from a second element of the third planetary gear assembly to the second element of the fourth planetary gear assembly, one from a third element of the first planetary gear assembly to a second element of the second planetary gear assembly, one from a third element of the third planetary gear assembly to a first element of the fourth planetary gear assembly and one from an element of the second planetary gear assembly to an element of the first planetary gear assembly. The automatic transmission also includes four clutches and three brakes which may be selectively engaged to provide nine, ten or eleven speed transmission operation.
63 Citations
16 Claims
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1. A multiple speed automatic transmission comprising, in combination,
a first, a second, a third and a fourth planetary gear assembly, each of said planetary gear assemblies having three members, an input member, an output member connected to one of said members of said first planetary gear assembly, a first member for connecting said one of said members of said second planetary gear assembly with one of said members of said fourth planetary gear assembly, a second member for connecting one of said members of said third planetary gear assembly with said one of said members of said fourth planetary gear assembly, a third member for connecting another of said members of said first planetary gear assembly with another of said members of said second planetary gear assembly, a fourth member for connecting another member of said third planetary gear assembly with said another of said members of said fourth planetary gear assembly, a fifth member for connecting yet another of said members of said first planetary gear assembly with yet another of said members of said second planetary gear assembly, and a plurality of torque transmitting devices selectively engageable to connect: - said input shaft to said fourth member, said input shaft to yet another of said members of said third planetary gear assembly, said input shaft to said another member of said second planetary gear assembly, said input shaft to said fifth member, yet another of said members of said fourth planetary gear assembly to ground, said another of said members of said first planetary gear assembly to ground and said yet another of said members of said third planetary gear assembly to ground.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A multiple speed automatic transmission comprising, in combination,
a first, a second, a third and a fourth planetary gear assembly, each of said planetary gear assemblies having a sun gear, a planet gear carrier including a plurality of planet gears and a ring gear, an input member, an output member connected to said planet gear carrier of said first planetary gear assembly, a first member for connecting said ring gear of said second planetary gear assembly to said planet gear carrier of said fourth planetary gear assembly, a second member for connecting said planet gear carrier of said fourth planetary gear assembly to said planet gear carrier of said third planetary gear assembly, a third member for connecting said ring gear of said first planetary gear assembly to said planet gear carrier of said second planetary gear assembly, a fourth member for connecting said ring gear of said third planetary gear assembly to said sun gear of said fourth planetary gear assembly, a fifth member for connecting said sun gear of said first planetary gear assembly to said sun gear of said second planetary gear assembly, and a plurality of torque transmitting devices selectively engageable to connect: - said input shaft to said fourth member, said input shaft to said sun gear of said third planetary gear assembly, said input shaft to said planet gear carrier of said second planetary gear assembly, said input shaft to said fifth member, said ring gear of said fourth planetary gear assembly to ground, said ring gear of said second planetary gear assembly to ground and said sun gear of said third planetary gear assembly to ground.
- View Dependent Claims (11, 12, 13, 14, 15, 16)
Specification