| 摘要 |
PURPOSE:To prevent a control from being influenced by inertia operation of a supercharger, by changing an intake air quantity, used for calculating a control quantity, into a study value, when an engine is in idle operation, after throttle fully-closed deceleration operation of the engine from its high loaded operation region is detected. CONSTITUTION:In an electronic control circuit 14, deceleration operation of an internal combustion engine 1 is detected on the basis of a throttle opening detected by a throttle sensor 36. When this deceleration operation continues for a predetermined time, an intake air quantity, used for calculating a basic fuel injection quantity, is switched from a value detected by an air flow meter 23 to a study value, when the engine is in idle operation, corrected in accordance with an opening of an intake passage 26 detouring around a throttle valve 24. Accordingly, the internal combustion engine 1 is placed in a deceleration condition with a supercharger 2 rotating by inertia, and even when the intake air quantity, detected by using the air flow meter 23, is in a value different from the actual value, a fuel injection quantity control can be executed by a value more approximate to the actual intake air quantity.
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