| 摘要 |
PROBLEM TO BE SOLVED: To provide an exhauster of an internal combustion engine in which when exhaust temperature becomes high, a flow channel changeover prohibition part makes a control valve opened to make exhaust gas pass through a catalyst, irrespective of the control state of a flow channel changeover control part, even in a case where fuel cut is executed, so that the catalyst can be prevented from being overheated.SOLUTION: When exhaust temperature T detected by an exhaust temperature detector 15 is a setting value (Tact1, Tact 2) or more, control means 14 includes a flow channel prohibition part 14C that makes a control valve 12 opened, irrespective of the control state of a flow channel changeover control part 14B. |
