Catalytic converter of vehicle

A catalytic converter apparatus of a vehicle, the catalytic converter apparatus comprising:

• a lean NOx trap (LNT) converter including an LNT catalyst to reduce nitrogen oxides contained in exhaust gas of the vehicle;
• an SDPF converter including an SDPF catalyst to capture particulate matters contained in the exhaust gas and reduce the nitrogen oxides contained in the exhaust gas using a reducing agent;
• a connection housing connecting the LNT converter and the SDPF converter to each other;
• an injection module provided in the connection housing to inject the reducing agent from the LNT converter toward the SDPF converter;
• an impactor provided inside the connection housing to atomize and vaporize the reducing agent injected from the injection module;
• a first guide mixer provided inside the connection housing to form a swirl-direction flow of the exhaust gas mixed with the reducing agent atomized through the impactor;
• and
• a second guide mixer provided downstream of the first guide mixer inside the connection housing to form an additional swirl-direction flow of the exhaust gas mixed with the reducing agent,
• wherein the injection module is mounted on the connection housing to inject the reducing agent in three directions toward the SDPF converter from the LNT converter,
• wherein the impactor includes:
• a first impactor disposed downstream of the first guide mixer to atomize and vaporize the reducing agent injected in two directions from the injection module among the three directions;
• and
• a second impactor disposed downstream of the first impactor to atomize and vaporize the reducing agent injected in one direction from the injection module among the three directions, and
• wherein the first impactor includes:
• a first fixing portion fixed to a lower surface of the connection housing above the LNT converter;
• a first left wall formed from the first fixing portion so that the reducing agent injected in one direction from the injection module collides therewith;
• and
• a first right wall formed from the first fixing portion so that the reducing agent injected in another direction from the injection module collides therewith.