US 9,810,295 B2
Planetary gear train of automatic transmission for vehicle
KyeongHun Lee, Seoul (KR); Chang Wook Lee, Suwon-si (KR); JongSool Park, Hwaseong-si (KR); Sueng Ho Lee, Seoul (KR); and Dong Hwan Hwang, Seoul (KR)
Assigned to Hyundai Motor Company, Seoul (KR)
Filed by Hyundai Motor Company, Seoul (KR)
Filed on Apr. 14, 2017, as Appl. No. 15/487,639.
Application 15/487,639 is a continuation in part of application No. 14/941,400, filed on Nov. 13, 2015.
Claims priority of application No. 10-2015-0063353 (KR), filed on May 6, 2015.
Prior Publication US 2017/0219061 A1, Aug. 3, 2017
Int. Cl. F16H 3/66 (2006.01)
CPC F16H 3/66 (2013.01) [F16H 2200/0069 (2013.01); F16H 2200/0073 (2013.01); F16H 2200/2012 (2013.01); F16H 2200/2048 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A planetary gear train of an automatic transmission for a vehicle, comprising:
an input shaft receiving an engine torque;
an output shaft outputting a shifted torque;
a first planetary gear set having a first rotation element, a second rotation element, and a third rotation element;
a second planetary gear set having a fourth rotation element, a fifth rotation element, and a sixth rotation element;
a third planetary gear set having a seventh rotation element, an eighth rotation element, and a ninth rotation element;
a fourth planetary gear set having a tenth rotation element, an eleventh rotation element, and a twelfth rotation element;
a first shaft connected with the first rotation element and selectively connectable with a transmission housing;
a second shaft interconnecting the second rotation element and the fourth rotation element, and connected with the input shaft;
a third shaft interconnecting the third rotation element and the tenth rotation element;
a fourth shaft connected with the fifth rotation element;
a fifth shaft interconnecting the sixth rotation element and the seventh rotation element, and selectively connectable with the first shaft;
a sixth shaft connected with the eighth rotation element and selectively connectable with the respective third shaft and fourth shaft and selectively connectable with the transmission housing;
a seventh shaft interconnecting the ninth rotation element and the twelfth rotation element, and selectively connectable with the transmission housing; and
an eighth shaft connected with the eleventh rotation element and connected with the output shaft.