US 9,810,290 B2
Planetary gear train of automatic transmission for vehicle
Seong Wook Hwang, Gunpo-si (KR); KyeongHun Lee, Seoul (KR); Sueng Ho Lee, Seoul (KR); Kangsoo Seo, Yongin-si (KR); Jae Chang Kook, Hwaseong-si (KR); Dong Hwan Hwang, Seoul (KR); Wookjin Jang, Yongin-si (KR); Myeong Hoon Noh, Seongnam-si (KR); Seongwook Ji, Ansan-si (KR); Wonmin Cho, Hwaseong-si (KR); JongSool Park, Hwaseong-si (KR); Hyu Tae Shim, Hwaseong-si (KR); and Chang Wook Lee, Suwoni-si (KR)
Assigned to Hyundai Motor Company, Seoul (KR)
Filed by Hyundai Motor Company, Seoul (KR)
Filed on Oct. 20, 2015, as Appl. No. 14/918,355.
Claims priority of application No. 10-2015-0078004 (KR), filed on Jun. 2, 2015.
Prior Publication US 2016/0356342 A1, Dec. 8, 2016
Int. Cl. F16H 3/66 (2006.01)
CPC F16H 3/66 (2013.01) [F16H 2200/0065 (2013.01); F16H 2200/2012 (2013.01); F16H 2200/2046 (2013.01); F16H 2200/2097 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A planetary gear train of an automatic transmission for vehicles, comprising:
an input shaft receiving torque of an engine;
an output shaft outputting changed torque of the engine;
a first planetary gear set including a first sun gear, a first planet carrier, and a first ring gear;
a second planetary gear set including a second sun gear, a second planet carrier, and a second ring gear;
a third planetary gear set including a third sun gear, a third planet carrier, and a third ring gear;
a fourth planetary gear set including a fourth sun gear, a fourth planet carrier, and a fourth ring gear;
a first shaft including the first sun gear;
a second rotation shaft including the first planet carrier and the second ring gear;
a third rotation shaft including the first ring gear and the third sun gear;
a fourth rotation shaft including the second sun gear and selectively connected to the input shaft;
a fifth rotation shaft including the second planet carrier and selectively connected to the input shaft or selectively connected to the transmission housing;
a sixth rotation shaft including the third planet carrier and the fourth ring gear and directly connected to the output shaft to be continuously operated as an output element;
a seventh rotation shaft including the third ring gear and selectively connected to the transmission housing;
an eighth rotation shaft including the fourth sun gear and selectively connected to the third rotation shaft;
a ninth rotation shaft including the fourth planet carrier and directly connected to the input shaft to be continuously operated as an input element; and
six friction elements disposed to selectively connect the rotation shafts with each other and selectively connect the rotation shafts with the transmission housing.