EXHAUST SYSTEM

摘要

PURPOSE: An exhaust system is provided to improve the purification efficiency of nitrogen oxide by employing a fuel decomposition catalyst arranged in the front of a nitrogen oxide purification catalyst. CONSTITUTION: An exhaust system comprises an exhaust line(150) which exhaust gas discharged from an engine passes through, a nitrogen oxide purification catalyst(160) which is installed in the exhaust line to reduce the nitrogen oxide included in the exhaust gas, an injector(120) which injects additional fuel to the exhaust line or an engine cylinder, and a fuel decomposition catalyst(130) which is installed between the injector and the nitrogen oxide purification catalyst.