| 摘要 |
A fuel supply controller for a flex-fuel engine in which, when a significant change in output of an alcohol concentration sensor (25) is acknowledged and air-fuel ratio feedback conditions are fulfilled, a remaining fuel supply determination section (41) determines that remaining fuel has been supplied, provided that the significant change in output of the air-fuel ratio sensor (32) has continued for a fourth threshold period. After the acknowledgement of the significant change till elapse of the fourth threshold period, basic supply quantity Tm is converted into converted supply quantity Tc based on an unupdated learning value; and after elapse of the fourth threshold period, the conversion is made based on an updated learning value, which is equivalent to the alcohol concentration after the significant change.
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