US 10,889,175 B1
Power transmission apparatus of hybrid electric vehicle
Seong Wook Hwang, Gunpo-si (KR); Soonki Eo, Ansan-si (KR); Ilhan Yoo, Hwaseong-si (KR); Dongwoo Kim, Incheon (KR); Yong Sug Choi, Hwaseong-si (KR); and Jong Hyo Park, Ansan-si (KR)
Assigned to HYUNDAI MOTOR COMPANY, Seoul (KR); and KIA MOTORS CORPORATION, Seoul (KR)
Filed by HYUNDAI MOTOR COMPANY, Seoul (KR); and KIA MOTORS CORPORATION, Seoul (KR)
Filed on Jun. 2, 2020, as Appl. No. 16/890,605.
Claims priority of application No. 10-2019-0161904 (KR), filed on Dec. 6, 2019.
Int. Cl. B60K 6/365 (2007.10); F16H 3/66 (2006.01); F16H 3/72 (2006.01); B60K 6/38 (2007.10)
CPC B60K 6/365 (2013.01) [B60K 6/38 (2013.01); F16H 3/666 (2013.01); F16H 3/725 (2013.01); B60Y 2200/92 (2013.01); F16H 2200/0021 (2013.01); F16H 2200/0039 (2013.01); F16H 2200/0052 (2013.01); F16H 2200/2007 (2013.01); F16H 2200/2041 (2013.01); F16H 2200/2064 (2013.01); F16H 2200/2094 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A power transmission apparatus for a hybrid electric vehicle having power sources of an engine and a motor/generator, the power transmission apparatus comprising:
an input shaft configured to receive an engine torque;
a compound planetary gear set formed by a combination of first and second planetary gear sets and including first, second, third, fourth, and fifth rotation elements;
a first shaft fixedly connected to the first rotation element, fixedly connected to the motor/generator, and selectively connected to the input shaft;
a second shaft fixedly connected to the second rotation element and selectively connected to the input shaft;
a third shaft fixedly connected to the third rotation element and selectively connected to a transmission housing;
a fourth shaft fixedly connected to the fourth rotation element;
a fifth shaft fixedly connecting the fifth rotation element and an output gear;
a sixth shaft selectively connected to the second shaft and the fourth shaft and selectively connected to the transmission housing;
a plurality of engagement elements including at least one clutch and at least one brake; and
an engagement unit selectively connecting the sixth shaft to the second shaft or the fourth shaft.