| 摘要 |
PROBLEM TO BE SOLVED: To improve exhaust emission control performance.SOLUTION: An exhaust emission control system 10 purifies an exhaust gas of an engine 11 by using a catalytic converter 24. The exhaust emission control system 10 includes: a spiral tube 35 which is provided at an exhaust pipe 23 connecting the engine 11 with the catalytic converter 24, guides the exhaust gas into the catalytic converter 24, and may freely deform; and an actuator 39 which deforms the spiral tube 35 to change flow passage resistance on the basis of a load of the engine 11. |
