| 摘要 |
PROBLEM TO BE SOLVED: To suppress an air-fuel ratio from becoming lean as compared with a target air-fuel ratio due to the shortage of fuel amount jetted during cold starting after an engine is temporarily stopped by using the learned value of the feedback correction amount of a jetted fuel amount provided when the dilution of oil with fuel is large. SOLUTION: An engine ECU performs a program including a step (S100) of performing an oil dilution rate calculation processing, a step (S200) of determining whether an oil dilution rate is large or not, and a step (S300) of prohibiting the storage of learned values within a range smaller than a threshold when the oil dilution rate is large (YES in S200). The smaller the learned value is calculated, the reduction correction amount of the jetted fuel amount is more increased. COPYRIGHT: (C)2007,JPO&INPIT
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