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Compact multi-speed automatic transmission

  • US 8,343,007 B2
  • Filed: 01/31/2011
  • Issued: 01/01/2013
  • Est. Priority Date: 01/31/2011
  • Status: Active Grant
First Claim
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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, 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.

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