Patent ID: 8303454

Claim:
A transmission for a vehicle comprising a first complex planetary gear train in which a first planetary gear train and a second planetary gear train are coupled to each other, a second complex planetary gear train in which a third planetary gear train and a fourth planetary gear train are coupled to each other, and which at least one rotational element of the second complex planetary gear train is connected with at least a rotational element of the first complex planetary gear train, an input shaft which is permanently connected to at least one rotational element of the first complex planetary gear train and is selectively connected to at least one rotational element of the first complex planetary gear train and at least a rotational element of the second complex planetary gear train, an output shaft which is connected to a rotational element of the second complex planetary gear train, first and second brakes which lock at least two rotational elements of the first complex planetary gear train, a third brake which locks a rotational element of the second complex planetary gear train, and a first clutch which selectively connects a rotational element of the first planetary gear train and a rotational element of the second planetary gear train to each other, wherein the first complex planetary gear train is configured so that a second rotational element of the first planetary gear train and a third rotational element of the second planetary gear train are permanently connected to each other, and a third rotational element of the first planetary gear train and a second rotational element of the second planetary gear train are selectively connected to each other via the first clutch.