| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an exhaust emission control device wherein urea water is prevented from returning to an injection port side, and the tip of a urea water injection device or the inner wall of a mixer chamber is prevented from being corroded. <P>SOLUTION: In the exhaust emission control device 1 in which a reductant injection device 7 is provided upstream of a selective contact reduction catalytic device 9 to supply a reductant to an exhaust passage 3, and a mixing unit 4 is provided which mixes the reductant injected by the reductant injection device 7 with the exhaust gas, and the mixing unit 4 is set so that the direction of exhaust gas introduced into the mixing unit 4 is changed and the exhaust gas is discharged from the mixing unit 4, current plates 5 are provided in the mixing unit 4, and the current plates 5 are set to change the direction of the exhaust gas introduced to the mixing unit 4 to the injection direction of the reductant injection device 7. <P>COPYRIGHT: (C)2012,JPO&INPIT |
