| 摘要 |
An air-fuel ratio control system in an internal combustion engine, whereby an acceleration condition is detected to obtain an enrichment correction of a fuel injection amount. An occurrence of a mild acceleration is detected by calculating a value of a rate of change in a parameter of an engine load, such as a degree of opening of a throttle value, between adjacent timings, accumulating values of the rate of change of the engine load parameter during a sampling period, and comparing the accumulated value with a predetermined threshold value.
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