Patent ID: 8480530
Filing Date: 2013-07-09
Classification: F16H

Abstract:
1. A multiple speed automatic transmission comprising: an input member; an output member; a first compound planetary gear assembly including a first planetary gear assembly having first, second, and third members and a second gear assembly having first and second members; a third and a fourth planetary gear assembly each having first, second, and third members; a first and a second chain drive assembly each including a chain drive sprocket, a driven chain sprocket and a sprocket engaging chain; a first connecting member continuously connecting the first planetary gear assembly and the chain drive sprocket of the second chain drive assembly; a second connecting member continuously connected to the second gear assembly; a third connecting member continuously connecting the first planetary gear assembly with the second member of the second gear assembly; a fourth connecting member continuously connecting the first planetary gear assembly with the chain drive sprocket of the first chain drive assembly; a fifth connecting member continuously connecting the driven chain sprocket of the first chain drive assembly with the third planetary gear assembly; a sixth connecting member continuously connecting the driven chain sprocket of the second chain drive assembly with the fourth planetary gear assembly; and a plurality of torque transmitting devices each selectively connecting one of the first, second, and third members of the planetary gear assemblies with one of another of the first, second, and third members of the planetary gear assemblies, a ground, and the input member, and wherein the output member is connected to the second member of the third planetary gear assembly and the second member of the fourth planetary gear assembly and the torque transmitting devices are engageable in combinations of three to establish at least eight forward gear ratios and one reverse gear ratio.