| 摘要 |
PROBLEM TO BE SOLVED: To provide an exhaust system.SOLUTION: An exhaust system comprises: an exhaust line through which exhaust gas passes; a nitrogen oxide (NOx) purification catalyst that reduces nitrogen oxide contained in the exhaust gas; an injector that additionally injects fuel for forming a reducing agent; a diesel fuel cracking (DFC) catalyst that raises the gas temperature by oxidation to detach the nitrogen oxide trapped in the nitrogen oxide purification catalyst and transforms the fuel that is additionally injected through the injector to a reducing agent to reduce the nitrogen oxide; a particulate filter; first to fourth sensors; first and second oxygen sensors; a control unit that executes a series of orders to perform each of first to eighteenth steps. On the exhaust line, the first oxygen sensor, the injector, the third temperature sensor, the DFC, the fourth temperature sensor, the particulate filter, the first temperature sensor, the nitrogen oxide purification catalyst, the second oxygen sensor, and the second temperature sensor are sequentially disposed from the engine to a tail pipe. |
