Patent ID: 7918084

Claim:
An exhaust gas purification apparatus for an internal combustion engine having a movable component that is operated during operation of the internal combustion engine, the operation of the movable component causing the temperature of exhaust gas of the internal combustion engine to change, the exhaust gas purification apparatus being adapted to execute an exhaust gas temperature increasing control for increasing the temperature of exhaust gas of the internal combustion engine during a process for recovering the purification capacity of an exhaust gas purification device, the exhaust gas purification apparatus comprising: a switching portion that, based on an engine operation region, switches the exhaust gas temperature increasing control between a first control in which the temperature of exhaust gas is increased without operating the movable component and a second control in which the temperature of exhaust gas is increased by operating the movable component; a detecting portion that detects a temporarily sticking state of the movable component; and a controlling portion that, when the temporarily sticking state of the movable component is detected, increases an execution region of the engine operation region for the first control toward an execution region of the engine operation region for the second control in an entire operation region of the internal combustion engine, whereby the execution region for the second control is reduced.