| 摘要 |
PROBLEM TO BE SOLVED: To prevent a passage changeover valve from being a closed state simultaneously even in a case where the passage changeover valve temporarily breaks down, and surely prevent an exhaust gas passage from being closed in a state where an engine is working, in an exhaust emission control system.SOLUTION: An exhaust emission control system of a ship 1 includes as an exhaust passage 30 of an engine 25 mounted on the ship 1: a main passage 31 communicating with the outside; and a bypass passage 32 branched from the middle part of the main passage 31. In the main passage 31 and the bypass passage 32, fluid operation type changeover valves 37, 38 for opening/closing each passage are arranged. The changeover valves are connected in an interlocked manner so that one is opened through a link mechanism 90 and the other is closed. |
