| 摘要 |
<p>Because opening of a flow enhancement valve affects not only a flow but also a flow rate, when the opening of the flow enhancement valve is transiently changed, if an ignition correction control is conducted on the basis of a relationship obtained in a steady operation state of the flow enhancement valve opening and the ignition timing, there occurs such a drawback that the ignition timing is set to a retard side or an advance side of the optimal point. In a control device for an internal combustion engine having a flow enhancement valve, an intake air quantity flowing into a cylinder is calculated on the basis of the intake air quantity detected by an air flow sensor, a rotating speed, and an operating state of the flow enhancement valve, a turbulent intensity index within the cylinder is calculated on the basis of the rotating speed, the intake air quantity flowing into the cylinder, and the operating state of the flow enhancement valve, and an ignition timing is calculated on the basis of the rotating speed, the intake air quantity flowing into the cylinder, and the turbulent intensity index.</p> |
