US 11,939,902 B2
Apparatus and method for purifying exhaust gas in hybrid electric vehicle
Il Suk Yang, Hwaseong-Si (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. 28, 2022, as Appl. No. 17/875,761.
Claims priority of application No. 10-2021-0110685 (KR), filed on Aug. 23, 2021.
Prior Publication US 2023/0059437 A1, Feb. 23, 2023
Int. Cl. F01N 3/20 (2006.01); B60W 20/16 (2016.01); F01N 3/30 (2006.01); F02B 39/10 (2006.01); F02D 41/00 (2006.01); F02D 41/06 (2006.01); F02M 26/03 (2016.01); F02M 26/22 (2016.01); F02M 26/71 (2016.01)
CPC F01N 3/2013 (2013.01) [B60W 20/16 (2016.01); F01N 3/306 (2013.01); F02B 39/10 (2013.01); F02D 41/0077 (2013.01); F02D 41/064 (2013.01); F02M 26/03 (2016.02); F02M 26/22 (2016.02); F02M 26/71 (2016.02)] 13 Claims
OG exemplary drawing
 
1. An apparatus of purifying exhaust gas of a hybrid vehicle, the apparatus comprises:
an electric supercharger disposed on an intake line through which intake air to be supplied to cylinders of an engine flows;
a post-treatment unit disposed on an exhaust line through which exhaust gas discharged from the cylinders flows and including an electrically-heated catalyst;
an exhaust gas recirculation unit including an exhaust gas recirculation cooler disposed on a recirculation line connecting the post-treatment unit and the intake line and an exhaust gas recirculation valve disposed on the recirculation line;
a three-way valve disposed at a position at which the recirculation line diverges into an ambient air supply line of a shut-off valve and the intake line; and
a controller electrically connected to the three-way valve and configured for controlling the three-way valve to be selectively opened or closed so that heated air discharged from the electric supercharger selectively flows toward the post-treatment unit through the recirculation line.