Patent ID: 8517885
Filing Date: 2013-08-27
Classification: F16H

Abstract:
1. A transmission for a vehicle comprising: a first compound planetary gear train in which a first planetary gear train and a second planetary gear train are connected to each other; a second compound planetary gear train which is connected with the first compound planetary gear train and in which a third planetary gear train and a fourth planetary gear train are connected to each other; an input shaft which is connected to the first compound planetary gear train; an output shaft which is connected to the second compound planetary gear train; a first clutch which selectively and directly connects a third rotational element of the first planetary gear train and a second rotational element of the second planetary gear train to each other; a second clutch which selectively connects the input shaft to a second rotational element of the first planetary gear train and a third rotational element of the second planetary gear train; a third clutch which selectively connects the input shaft to a third rotational element of the third planetary gear train; a first brake which selectively locks the second rotational element of the first planetary gear train and the third rotational element of the second planetary gear train; a second brake which selectively and directly locks a first rotational element of the first planetary gear train wherein the second brake is directly connected to the first rotational element of the first planetary gear train; a third brake which selectively locks a first rotational element of the third planetary gear train along with a first rotational element of the fourth planetary gear train; and a fourth brake which selectively locks the third rotational element of the third planetary gear train along with a second rotational element of the fourth planetary gear train.