| 摘要 |
PURPOSE:To aim at improving emission and as well at enhancing the economy of fuel consumption, by detecting the period of feed-back upon feed-back control to compensate the air-fuel ratio upon feed-back control in accordance with the result of the detection. CONSTITUTION:When a computing control circuit 50 controls the fuel injection of an internal-combustion engine 10, the output of an oxygen sensor 15 disposed in the exhaust system of the internal-combustion engine is fed-back under predetermined condition, and the control of feed-back is made to the amount of fuel injected from a fuel injection valve 17 in order to obtain a predetermined air-fuel ratio. At this time the feed-back period of feed-back control is detected so that the result of the detection is compensated in accordance with the operating condition of the engine, and as well the feed-back control is carried out in accordance with the compensated result of the detection. Thus, the control of the fuel injection amount may always be made, suitably, thereby it is possible to aim at improving emission and enhancing the economy of fuel consumption. |
