US 9,810,289 B2
Planetary gear train of automatic transmission for vehicles
Wonmin Cho, Hwaseong-si (KR); Jae Chang Kook, Hwaseong-si (KR); Myeong Hoon Noh, Seongnam-si (KR); Seongwook Ji, Ansan-si (KR); Kangsoo Seo, Yongin-si (KR); and Seong Wook Hwang, Gunpo-si (KR)
Assigned to Hyundai Motor Company, Seoul (KR)
Filed by Hyundai Motor Company, Seoul (KR)
Filed on Oct. 6, 2015, as Appl. No. 14/876,662.
Claims priority of application No. 10-2014-0177364 (KR), filed on Dec. 10, 2014.
Prior Publication US 2016/0169341 A1, Jun. 16, 2016
Int. Cl. F16H 3/66 (2006.01)
CPC F16H 3/66 (2013.01) [F16H 2200/0069 (2013.01); F16H 2200/2012 (2013.01); F16H 2200/2046 (2013.01)] 10 Claims
OG exemplary drawing
 
6. A planetary gear train of an automatic transmission for a vehicle, comprising:
an input shaft receiving torque of an engine;
an output shaft outputting changed torque;
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; and
a fourth planetary gear set including a fourth sun gear, a fourth planet carrier, and a fourth ring gear,
wherein the input shaft is directly connected to the second planet carrier,
the output shaft is directly connected to the third ring gear and the fourth planet carrier,
the first sun gear is directly connected to the second sun gear,
the first planet carrier is directly connected to the fourth ring gear,
the second ring gear is directly connected to the third sun gear,
the third ring gear is directly connected to the fourth planet carrier,
the fourth sun gear is selectively connected to the input shaft,
the first planet carrier and the fourth ring gear are selectively connected to the second ring gear and the third sun gear,
the second ring gear and the third sun gear are selectively connected to the fourth sun gear,
the third planet carrier is selectively connected to the fourth sun gear,
the first sun gear and the second sun gear are selectively connected to a transmission housing, and
the first ring gear is selectively connected to the transmission housing.