Patent ID: 8651995

Claim:
A powertrain of an automatic transmission comprising: a first planetary gear set having: a first operating member fixedly connected to a transmission case; a second operating member; and a third operating member fixedly connected to an input shaft; a second planetary gear set having: a fourth operating member; a fifth operating member; and a sixth operating member selectively connected to the second operating member; a third planetary gear set having: a seventh operating member fixedly connected to the fourth operating member, selectively connected to the input shaft, and selectively connected to the transmission case; an eighth operating member selectively connected to the third operating member and selectively connected to the transmission case; and a ninth operating member fixedly connected to the fifth operating member and fixedly connected to an output shaft; and a plurality of friction members, wherein each of said plurality of friction members selectively connects a respective one of said operating members of the first, second, and third planetary gear sets, with at least one other of said operating members of the first, second and third planetary gear sets, the input shaft, and the transmission case; wherein the first planetary gear set is a double pinion planetary gear set having operating members of a first sun gear, a first ring gear, and a first planet carrier, the first sun gear acting as the first operating member, the first ring gear acting as the second operating member, and the first planet carrier acting as the third operating member; wherein the second planetary gear set is a double pinion planetary gear set having operating members of a second sun Rear, a second ring gear, and a second planet carrier, the second sun gear acting as the fourth operating member, the second ring gear acting as the fifth operating member, and the second planet carrier acting as the sixth operating member; wherein the third planetary gear set is a double pinion planetary gear set having operating members of a third sun gear, a third ring gear, and a third planet carrier, the third sun gear acting as the seventh operating member, the third ring gear acting as the eighth operating member, and the third planet carrier acting as the ninth operating member; and wherein the plurality of friction members comprise: a first clutch selectively connecting the input shaft and the third sun gear; a second clutch selectively connecting the first planet carrier and the third ring gear; a third clutch selectively connecting the first ring gear and the third sun gear; a fourth clutch selectively connecting the first ring gear and the second planet carrier; a first brake selectively connecting the third sun gear to the transmission case; and a second brake selectively connecting the third ring gear to the transmission case.