| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an exhaust gas purification device having simple structure, in which a reductant injected from a reductant supply means is prevented from being introduced into an opening formed in an exhaust pipe and designed to pass the reductant therethrough. <P>SOLUTION: The exhaust gas purification device includes an aftertreatment device which is provided in an exhaust system of an internal combustion engine and which reduces and purifies a nitrogen compound by the reductant supplied from the reductant supply means. The exhaust gas purification device further includes: a first exhaust pipe portion 13 through which exhaust gas is discharged; and a second exhaust pipe portion 14 which is formed in the form of a cylinder having a bottom, is connected to the aftertreatment device at the other end side of the bottom, and has the opening 60 designed to pass the reductant therethrough and formed in the bottom and an introduction port 40 communicating with the first exhaust pipe portion 13 and formed in the side portion adjacent to the bottom, wherein an annular protrusion 51 which is projected so as to surround the periphery of the opening 60 is provided on the inner surface 53 of the bottom. <P>COPYRIGHT: (C)2012,JPO&INPIT |
