| 摘要 |
PROBLEM TO BE SOLVED: To provide a control device for an internal combustion engine capable of learning a vapor concentration in consideration of variations in a purge flow rate due to the magnitude of a load of the internal combustion engine and capable of improving the accuracy of air/fuel ratio control. SOLUTION: When vapor concentration learning is started, an average value FAFAV of a feedback correction coefficient FAF is determined whether it is within a predetermined range or not in a step 180. When the average value FAFAV is larger than 1.02 and smaller than 0.98, a renew amount tFG is made to be 0 at a step 186. When the average value FAFAV is equal to or larger than 1.02 or equal to or smaller than 0.98 in the step 180, a renew amount correction coefficient KRPG is calculated based on a map by a perge ratio PGR and a load ratio KLOAD in a step 182. Then, the renewed amount tFG of the vapor concentration value is calculated by using the renew amount correction coefficient KRPG in a step 184 based on ä(1-FAFAV)/PGR}×KRPG. The renewed amount tFG is added to the vapor concentration value FGPG in a step 188. COPYRIGHT: (C)2004,JPO
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