Patent 7384363 was granted and assigned to Hyundai Motor Company on June, 2008 by the United States Patent and Trademark Office.
A six-speed powertrain of an automatic transmission is formed by combining three simple planetary gear sets, and an output element is realized as a single element without combination with a clutch. Therefore, because a torque load of a respective clutch is reduced, durability may be enhanced and a length of the transmission may be minimized.