| 摘要 |
PROBLEM TO BE SOLVED: To provide a catalyst-using exhaust emission control device that can suppress a decline in an exhaust purification rate in a catalyst even when an exhaust flow rate in an exhaust pipe is large.SOLUTION: A catalyst-using exhaust emission control device 100 purifies exhaust gas discharged from an internal combustion engine 101 through an exhaust pipe 102 into the atmosphere by using a catalyst. The catalyst-using exhaust emission control device 100 includes an exhaust storage device 400 for storing exhaust gas when an exhaust flow rate in the exhaust pipe 102 is large and emitting the stored exhaust gas when the exhaust flow rate in the exhaust pipe 102 is small.SELECTED DRAWING: Figure 1 |
