| 摘要 |
PURPOSE:To control an air-fuel ratio so smoothly and stably all the time under a learning value, by controlling a fuel supply so as to perform its learning at a learning device in response to a cumulative value discriminating signal when a cumulative value to a feedback compensation value for the air-fuel ratio gets out of the specified range. CONSTITUTION:A device, bearing the above caption, is provided with a first detecting device 3a detecting a physical quantity necessary for the regulation of a feed fuel quantity to an engine and a second detecting device 3b detecting oxygen content in exhaust gas. And, a feedback compensation value to the feed fuel quantity required for making an air-fuel ratio a desired value is calculated with an operational device 4 according to the oxygen content, while a learning value to the feed fuel quantity required for making the air-fuel ratio the desired value is calculated with a learning device 5 whereby it calculates the feed fuel quantity according to those of the said physical quantity, feedback compensation value and learning value with an operational device 6. At the abovementioned, the feedback compensation value is cumulated by a cumulating device 8, and that whether this cumulative value gets out of the specified range or not is discriminated by a discriminating device 9, and when YES is the case, learning at the learning device 5 is carried out but when NO is the case, the learning is made so as to be stopped.
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