| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an exhaust emission control device capable of minimizing fuel pressure fluctuation (pressure pulsation) in an addition system including a reducing agent addition valve and a pipe, when the reducing agent addition valve for injecting a fuel component to exhaust gas is provided in the middle of an exhaust pipe. <P>SOLUTION: This exhaust emission control device is provided with the exhaust pipe 31 extending from an internal combustion engine and exhausting exhaust gas; a NOx elimination device 38 arranged in the exhaust pipe 31 and eliminating NOx in exhaust gas; the reducing agent addition valve 40 connected with a fuel tank 28 by the pipe 43 and injecting the fuel component to exhaust gas in the vicinity of the NOx elimination device 38; and a pulsation suppressing member 45 which is provided in the addition system 47 including the reducing agent addition valve 40 and the pipe 43 and suppresses fuel pressure fluctuation generated in the addition system 47 along with opening/closing of the reducing agent addition valve 40. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
