CATALYTIC CONVERTER FOR VEHICLE

摘要

A catalytic converter for a vehicle includes an LNT converter into one side of which exhaust gas discharged from an engine flows and from the opposite side of which the exhaust gas. The LNT converter traps nitrogen oxide contained in the exhaust gas under a lean environment, desorbs the trapped nitrogen oxide under a rich environment, and reduces the nitrogen oxide contained in the exhaust gas or the desorbed nitrogen oxide. A connecting housing changes a direction of a path of the exhaust gas to a vertical direction, and allows a reducing agent to be injected to the exhaust gas. An SDPF converter changes a direction of a path of the exhaust gas to a direction opposite to a direction, captures particulate matters contained in the exhaust gas, and reduces nitrogen oxide contained in the exhaust gas using the injected reducing agent.

主权项

1. A catalytic converter for a vehicle, the catalytic converter comprising:
an LNT 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.