US 11,754,172 B2
Powertrain-cooling system of hybrid vehicle
Se Hwan Jo, Bucheon-si (KR); Seong Min Son, Pohang-si (KR); Kyung Moo Lee, Yongin-si (KR); and Bong Uk Bae, Daegu (KR)
Assigned to Hyundai Motor Company, Seoul (KR); and Kia Corporation, Seoul (KR)
Filed by Hyundai Motor Company, Seoul (KR); and Kia Corporation, Seoul (KR)
Filed on Jul. 19, 2021, as Appl. No. 17/379,028.
Claims priority of application No. 10-2021-0023286 (KR), filed on Feb. 22, 2021.
Prior Publication US 2022/0268355 A1, Aug. 25, 2022
Int. Cl. F16H 57/04 (2010.01); B60K 6/22 (2007.10); B60K 1/00 (2006.01)
CPC F16H 57/0476 (2013.01) [B60K 6/22 (2013.01); F16H 57/0413 (2013.01); F16H 57/0435 (2013.01); F16H 57/0436 (2013.01); F16H 57/0473 (2013.01); B60K 2001/003 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A powertrain-cooling system of a vehicle, the powertrain-cooling system comprising:
an electric oil pump;
a pressure control valve including an input port receiving a fluid discharged from the electric oil pump, an output port outputting the fluid to a transmission while adjusting a pressure of the fluid, and a drain port discharging a portion of the fluid according to adjustment of the pressure of the fluid;
a first motor cooling path connecting the drain port of the pressure control valve to a first motor forming a hybrid powertrain; and
a controller electrically connected to the electric oil pump and configured for controlling the electric oil pump to cool the transmission and the first motor,
wherein the transmission is provided with a second motor forming the hybrid powertrain,
wherein an engine clutch is mounted between the first motor and the second motor, and
wherein a flow rate control device is connected to the output port of the pressure control valve to control a state in which a portion of the fluid which is supplied from the pressure control valve to the transmission is supplied to the second motor and the engine clutch.