| 摘要 |
PURPOSE:To reduce the capacity of a memory, by causing the memory to store only a map of thickening coefficients and a map of fuel correction coefficients for giving a lean side limit to the air-fuel ratio which corresponds to the warmed-up state of an engine, and by jointly using a map for calculating a fuel correction coefficient after the warm-up of the engine, to calculate a fuel correction coefficient for the cold state of the engine. CONSTITUTION:A first fuel correction coefficient calculating means A for calculating a fuel correction coefficient KMR1 for giving an aimed air-fuel ratio after the warm-up of an engine depending on the rotational frequency N of the engine, the quantity QA of intake air and so forth is provided. A second fuel correction coefficient calculating means B for calculating a fuel correction coefficient KMR2 for giving a lean side limit to an aimed air-fuel ratio depending on the warmed-up state of the engine detected from the temperature TW of cooling water or the like is provided. One of the fuel correction coefficients KMR1, KMR2, which acts to increase the air-ful ratio, is compensated by a cold-state fuel correction coefficient calculating means D through the use of a thickening coefficient KTW calculated by a calculating means C, to compute a fuel correction coefficient KMR for giving an aimed air-fuel ratio for the warm-up of the engine, to correct the fed quantity of fuel during the warm-up.
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