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 |
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.
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