Patent ID: 6176803
Filing Date: 2001-01-23
Classification: F16H

Abstract:
A transmission assembly comprising:a housing;a first planetary gear set including a sun gear, a ring gear, and a planet carrier supporting a number of inner planet gears intermeshed with a number of outer planet gears, said inner planet gears being further intermeshed with said sun gear and said outer planet gears being further intermeshed with said ring gear;a second, a third, and a fourth planetary gear sets each gear set including a sun gear, a ring gear, and a planet carrier supporting a number of planet gears intermeshed with, a respective said sun gear and said ring gear;an input shaft which drives said sun gear of said first planetary gear set;a first member which connects said planet carrier of said third planetary gear set and said ring gear of said fourth planetary gear set;a second member which connects said sun gear of said third planetary gear set to said sun gear of said fourth planetary gear set;a third member which connects said ring gear of said first planetary gear set to (i) said planet carrier of said second planetary gear set and (ii) said ring gear of said third planetary gear set;a fourth member which connects said planet carrier of said first planetary gear set to said sun gear of said second planetary gear seta transmission output shaft driven by said planet carrier of said fourth planetary set;a first clutch which is operative to selectively engage said input shaft with said second member;a second clutch which is operative to selectively engage said input shaft with said first member;a third clutch which is operative to selectively engage said fourth member with said housing;a fourth clutch which is operative to selectively engage ring gear of said second planetary gear set with said housing;a fifth clutch which is operative to selectively engage said third member with said housing; anda sixth clutch which is operative to engage said first member to said housing.