| 摘要 |
PROBLEM TO BE SOLVED: To provide a technique for an exhaust emission control device for an internal combustion engine to suppress the restriction on the actuation of a variable capacity turbocharger due to the adhesion of a reducing agent contained in an exhaust to the turbocharger. SOLUTION: This exhaust emission control device is provided with the variable capacity turbocharger 15, a fuel injection valve 3, a fuel injection valve control means 35, an operating condition detecting means 36 for detecting operating condition and a determining means 35 determining in accordance with a detection result by the operating condition detecting means 36 if it is necessary to eliminate particle materials adhering to a movable part of the variable capacity turbocharger 15. When the determining means 35 determines that it is necessary to eliminate the particle materials, fuel is injected by the fuel injection valve control means 35 when a piston is near the top dead center at the final stage of the exhaust stroke, and another fuel injection is made at a timing delayed from a normal fuel injection timing. |
