| 摘要 |
An object of this invention is to prevent components such as NOx and H2S being emitted when starting a vehicle and improve exhaust emissions by utilizing information of a navigation system. A navigation system 52 mounted in the vehicle is connected to an ECU 50. The ECU 50 predicts whether a stopping time of the internal combustion engine 10 is near based on the current position and travel history of the vehicle obtained from the navigation system 52. When a stopping time is near, the ECU 50 executes rich spike control prior to the stopping time to thereby perform a regeneration process of the NOx catalyst 26. Thus, NOx components or sulfur components remaining in the catalyst 26 can be eliminated before stopping the internal combustion engine 10. Accordingly, even if warming up is performed when the engine is next started, emission of NOx or hydrogen sulfide can be avoided.
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