| 摘要 |
<P>PROBLEM TO BE SOLVED: To easily remove components of reducing agent accumulated in an exhaust pipe. <P>SOLUTION: In the inner wall at the lower part of the exhaust pipe 2 of an engine, a recessed portion 11 is formed by caving at least a portion on which urea water solution injected and supplied from an injection nozzle 5 is deposited. The recessed portion 11 has a demountable bottom wall 12. Thus, urea water solution having large particulate sizes out of the urea water solution injected from the injection nozzle 5 drops toward the recessed portion 11, and so it is accumulated on the recessed portion 11 even when urea is precipitated out of the urea water solution. The urea accumulated on the recessed portion 11 is easily removed after demounting the bottom wall 12, if necessary. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
