| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an exhaust emission control device of a diesel engine capable of effectively utilizing the heat of an exhaust gas and realizing miniaturization by devising arrangement of each post-treatment units, and an exhaust emission control method using the same. <P>SOLUTION: The exhaust emission control device 17 includes an oxidation catalyst 19 disposed in an exhaust passage 7 of a diesel engine 1 for purifying CO and HC in an exhaust gas, a urea injection nozzle 22 disposed downstream of the oxidation catalyst 19 for producing ammonia by spraying urea water into the exhaust gas, a turbine 13 of a turbo charger 9 disposed downstream of the urea injection nozzle 22 for promoting decomposition of the urea by agitating the sprayed urea water, a DPF 20 disposed downstream of the turbine 13 for collecting PM in the exhaust gas, and a selective reduction type catalyst 23 disposed downstream of the DPF 20 for detoxifying NOx in the exhaust gas by reduction reaction with ammonia. <P>COPYRIGHT: (C)2011,JPO&INPIT |
