Patent ID: 8012059
Filing Date: 2011-09-06
Classification: F16H

Abstract:
1. A multiple speed automatic transmission comprising, in combination, an input member, an output member, first, second, third and fourth planetary gear assemblies each having a sun member, a ring member and a planet carrier member, said input member coupled to said planet carrier member of said first planetary gear assembly, said output member coupled to said planet carrier member of said third planetary gear assembly, a first member coupling said sun member of said first planetary gear assembly to said sun member of said fourth planetary gear assembly, a second member coupling said planet carrier member of said fourth planetary gear assembly to said ring member of said third planetary gear assembly, a third member coupling said ring gear of said first planetary gear assembly to said sun member of said second planetary gear assembly, a fourth member coupling said planet carrier member of said third planetary gear assembly to said planet carrier member of said second planetary gear assembly, a first brake selectively connecting said sun member of said fourth planetary gear assembly to ground, a second brake selectively connecting said ring member of said fourth planetary gear assembly to ground, wherein said second brake is compound, a first clutch selectively connecting said planet carrier member of said first planetary gear assembly to said sun member of said third planetary gear assembly, a second clutch selectively connecting said sun member of said second planetary gear assembly to said sun member of said third planetary gear assembly, and a third clutch selectively connecting said ring member of said second planetary gear assembly to said sun member of said third planetary gear assembly.