| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an exhaust passage structure capable of surely preventing the leakage of urea water from a joint dripped in a lower part of a downstream side exhaust pipe. <P>SOLUTION: This exhaust passage structure is provided by arranging an injection nozzle 3 for injecting the urea water on the upstream side of an exhaust emission control device 2, and an exhaust passage 1 is constituted by connecting the upstream side and downstream side exhaust pipes 11 and 12 via the joint 13. The joint 13 is positioned on the upstream side in the flowing direction of exhaust gas more than the downstream side exhaust pipe 12 for positioning an injection area of the urea water injected into the exhaust passage 1 from the injection nozzle 31, and positioned at an elevated spot more than its downstream side exhaust pipe 12. <P>COPYRIGHT: (C)2009,JPO&INPIT |
