| 摘要 |
PURPOSE:To control air-fuel ratio at an optimum rate at the time of operation being decelerated from every load conditions, and to prevent the occurrence of deceleration shock or the like, by correcting the fuel injection quantity at the time of decelerating operation so as to be increased in response to the engine load at the time of decelerating operation start. CONSTITUTION:On the upstream side of a throttle valve B being interposed in an intake air passage A, an intake air quantity detecting means C is provided, and on the downstream side thereof, a fuel injection valve D is provided. And a means E which sets the fuel injection quantity on the basis of the intake air quantity, and a means H which drives and controls the fuel injection valve D on the basis of the fuel injection quantity are provided respectively. In this constitution, a means G which detects the decelerating operational condition of an engine, and a means N which detects the engine load at the time of decelerating operation start are provided respectively. And a means I which corrects the fuel injection quantity so as to be increased in response to the engine load, when the decelerating operational condition of the engine is detected, is provided. Thus, the air-fuel ratio at the time of operation being decelerated from every load conditions can be controlled at an optimum rate.
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