Patent ID: 8574114
Filing Date: 2013-11-05
Classification: F16H

Abstract:
1. Automatic transmission of planetary structure, for a motor vehicle, comprising: a drive input shaft; a drive output shaft; first, second, third and fourth planetary gear sets, and each of the first, the second, the third and the fourth planetary gear sets comprising three elements; six shifting elements for achieving ten forward speed ratios and at least one reverse speed ratio, wherein the output shaft is permanently connected with one of the elements of the third planetary gear set; the input shaft is permanently connected with one of the elements of the fourth planetary gear set; a first one of the elements of the first planetary gear set is connectable to the transmission housing by engaging a first one of the six shifting elements; a second one of the elements of the first planetary gear set is connectable to the transmission housing by engaging a second one of the six shifting elements; one of the elements of the fourth planetary gear set is connectable to the transmission housing; a first interconnecting shaft permanently connects one of the elements of the first planetary gear set with one of the elements of the fourth planetary gear set; a second interconnecting shaft permanently connects one of the elements of the first planetary gear set with one of the elements of the third planetary gear set; and a third interconnecting shaft permanently connects one of the elements of the second planetary gear set with one of the elements of the fourth planetary gear set.