| 摘要 |
PURPOSE:To improve the response of the engine to the control of air-fuel ratio, by making the control gain upon initiation of feed-back control, and as well by providing a compensating means for supplying secondary air upstream of an oxygen sensor. CONSTITUTION:A computing means A issues a fuel signal in accordance with the output signal of an oxygen sensor 6. A fuel supply means B sets, by a compensating means E, the control gain of initial feed-back control through which an injector 7 injects fuel to be fed, larger than that of normal feed-back control. Further, secondary-air is fed around the oxygen sensor 6 to set the air-fuel ration to be rich. With this arrangement, the response of the engine to the control may be enhanced as well the operational characteristics thereof may be also satisfied. |
