| 摘要 |
PROBLEM TO BE SOLVED: To provide an exhaust cleaning device capable of suppressing deposition of a deposit to a nozzle of a reductant injection valve than heretofore.SOLUTION: An exhaust cleaning device includes: a catalyst which is disposed on an exhaust pipe 41 of an internal combustion engine and cleans emission gas G; a reductant injection valve 51 which has a nozzle 103 for injecting a reductant into the exhaust pipe 41 of the upstream side from the catalyst; and a support member 52 which supports the reductant injection valve 51 on the exhaust pipe 41, where the function of the catalyst is recovered by adding the reductant to the emission gas G from the reductant injection valve 51. The support member 52 includes a nozzle storage part 111 which stores at least a part of the nozzle 103 and a shroud part 112 which is communicated from the nozzle storage part 111 to the exhaust pipe 41, is located in the forward direction from the top end surface of the nozzle 103 and has a through-hole 112a of an inner diameter smaller than the inner diameter of the nozzle storage part 111, and a gap S is disposed between the nozzle 103 and the shroud part 112. |
