| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a technique for correcting variation in mixing ratio of an EGR gas amount passing through a low-pressure EGR passage and a high-pressure EGR passage, in an exhaust recirculation device for an internal combustion engine. <P>SOLUTION: The exhaust gas recirculation device for an internal comprises: a turbocharger; the low-pressure EGR passage; the high-pressure EGR passage; and an airflow meter. A high-pressure EGR gas amount is feedback-controlled depending on fresh air amounts, and open-loop control of a low-pressure EGR gas amount is performed based on an operational status of the internal combustion engine. Opening of each equipment and the fresh air amount are set to be reference values, and based on a measured fresh air amount at the time, a relation between the low-pressure EGR gas amount and the opening of the equipment which can adjust it is learned and corrected. <P>COPYRIGHT: (C)2008,JPO&INPIT |
