| 摘要 |
PURPOSE:To prevent the sudden change of an intake air amount by applying the constitution wherein the higher value of an intake air amount value and an intake air amount value as operated and processed is used as an intake air amount value under an high engine load when an intake air amount in a high engine load range exceeds the predetermined value, and controlling ignition timing with a map from the aforesaid higher value. CONSTITUTION:In the system wherein an ignition coil IGT is controlled with a control part 52 for controlling ignition timing, the control part 52 is made to operate the ignition timing on the basis of output signals from an airflow meter 16, a knock sensor 60, an O2 sensor 66, a crank angle sensor 70 and the like. Namely, the required ignition timing is obtained from the map of an intake air amount value as an engine load and an engine speed value for controlling the ignition timing. In addition, when an intake air amount value in a high engine load range exceeds the predetermined value, the higher value of the intake air amount value and an operated and processed value available therefrom is adopted as an intake air amount value in the high load range, and ignition timing required for the high load range is operated from the map of the the aforesaid higher value and an engine speed value. |
