Catalytic converter for vehicle

A catalytic converter for a vehicle, the catalytic converter comprising:

• an LNT converter trapping nitrogen oxide contained in exhaust gas under a lean environment in which an air/fuel ratio is lower than a reference ratio, desorbing the trapped nitrogen oxide under a rich environment in which the air/fuel ratio for an engine is the same or higher than the reference ratio, and reducing the nitrogen oxide contained in the exhaust gas or the desorbed nitrogen oxide;
• a connecting housing changing a path of the exhaust gas discharged from the LNT converter to a vertical direction and allowing a reducing agent to be injected to the exhaust gas;
• and
• a diesel particle filter with selective catalytic reduction coating (SDPF) converter changing a direction of a path of the exhaust gas flowing from the connecting housing to a direction opposite to a direction in which the exhaust gas is discharged from the LNT converter, capturing particulate matters contained in the exhaust gas, and reducing the nitrogen oxide contained in the exhaust gas using the reducing agent,
• wherein the connecting housing includes:
• a lower cover connecting a portion of the LNT outlet and a portion of the SDPF inlet;
• an upper cover disposed at an upper side of the lower cover and covering the LNT outlet and the SDPF inlet;
• and
• a connecting flow path formed between the lower cover and the upper cover and along which the exhaust gas moves from the LNT outlet to the SDPF inlet,
• wherein the upper cover includes:
• an inner cover;
• an outer cover attached to an outer side of the inner cover and having a shape corresponding to the inner cover;
• and
• a connecting thermal insulator disposed between the inner cover and the outer cover.