| 摘要 |
PROBLEM TO BE SOLVED: To provide an intake amount control system which can suppress an increase of learning loads of flow rate characteristics of throttle valves even if the system comprises a plurality of the throttle valves.SOLUTION: An intake amount control system of an internal combustion engine comprises: throttle valves 4 arranged at a plurality of intake pipes 3, respectively; a control device 8 for feedback-controlling actual openings of the throttle valves 4 to target openings which are common to all the throttle valves 4; and an airflow meter 7 as air amount measurement means for measuring a total amount which is obtained by totalizing flow rates of air passing through the throttle valves 4. When setting a characteristic indicating a relationship between the target openings and the total amount as the flow rate characteristic, the control device of the intake amount control system performs learning control for learning displacement between the total amount which is estimated on the basis of a pre-stored flow rate characteristic and the total amount which is measured by the air amount measurement means by making it associated with an average opening being a value which is obtained by averaging the actual openings of all the throttle valves 4.SELECTED DRAWING: Figure 1 |
