| 摘要 |
PROBLEM TO BE SOLVED: To provide an exhaust emission control system the system configuration of which can be simplified without generating fuel consumption loss.SOLUTION: An exhaust emission control system 1 includes: a selective reduction catalyst (SCR) 6 provided in the middle of an exhaust pipe 3 connected to an engine 2; a chemical heat storage part 8 which is arranged upstream from the SCR 6 and heats the SCR 6 by chemically reacting a heat storage material such as MgClwith ammonia (NH) thereby generating heat; a reducing agent addition part 9 which is arranged upstream from the SCR 6 and adds NHas the reducing agent into the exhaust pipe 3; and common use ammonia tank 12 connected to the chemical heat storage part 8 and the reducing agent addition part 9 in parallel with them through supply pipes 10, 11, respectively. The common use ammonia tank 12 is a tank storing altogether NHwhich is a heat storage medium and also the reducing agent. |
