| 摘要 |
The present invention has an object to obtain an accurate amount of intake air at the time of an operation of an EGR mechanism in a control system of an internal combustion engine which is provided with a first fuel injection valve for injecting fuel into a cylinder, a second fuel injection valve for injecting fuel into an intake port, and the EGR mechanism. In order to achieve this object, the present invention resides in a control system of an internal combustion engine which is provided with a first fuel injection valve that injects fuel into a cylinder of the internal combustion engine, a second fuel injection valve that injects fuel into an intake port of the internal combustion engine, an EGR passage that introduces an EGR gas from an exhaust passage of the internal combustion engine to an intake passage thereof, an EGR valve that is arranged in the EGR passage, and an obtaining means that obtains an amount of intake air in the internal combustion engine, wherein when the EGR valve is open, a determination is made based on a value of a cylinder injection ratio, as to whether the amount of intake air is in an increasing tendency or in a decreasing tendency with respect to a change in the cylinder injection ratio, and a value of the amount of intake air thus obtained is corrected according to a result of the determination.
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