| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a device and a method for controlling exhaust-gas of an internal combustion engine which prevents a nozzle hole for a reducing-agent from becoming clogged due to crystallization of a principal component of the reducing agent. <P>SOLUTION: The device for controlling exhaust gas includes a NOx catalyst placed in the exhaust path of an internal combustion engine for reducing NOx in the exhaust gas discharged from the internal combustion engine, and a reducing-agent injection part for injecting the reducing agent in the exhaust-gas path upstream of the NOx catalyst. In the device for controlling the exhaust gas, a swirler is provided in the upstream of the NOx catalyst in the exhaust path so as to uniformly disperse the reducing agent in the exhaust gas. <P>COPYRIGHT: (C)2007,JPO&INPIT |
