| 摘要 |
PROBLEM TO BE SOLVED: To provide an exhaust gas purification device allowing a reducing agent to be sufficiently diffused.SOLUTION: The exhaust gas purification device is for purifying exhaust gas flowing through an exhaust passage of an engine, and comprises a fin 16 and an injection device 13. The fin 16 is provided in an inflow port 15 of a pipe 3 of an exhaust flow path 1 and which guides the exhaust gas so as to generate a swirl flow. The injection device 13 injects a reducing agent into the swirl flow of the exhaust gas. Hereat, the fin 16 is expanded toward a downstream side in an injection direction of the reducing agent so as to surround an injection region A of the reducing agent. In the exhaust gas purification device as above described, not only the exhaust gas can be caused to generate a swirl flow to diffuse the reducing agent by the fin 16 but also the exhaust gas can be prevented from directly intruding into the injection region A of the reducing agent by the fin 16, so that the injected reducing agent can be prevented from flowing by a flow of exhaust gas and adhering to the fin 16 and an inner wall surface of the pipe 3. |
