| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fuel injection control device for internal combustion engine that prevents deterioration in accuracy of controlling an air-fuel ratio of an air-fuel mixture. <P>SOLUTION: The fuel injection control device is applied to an internal combustion engine that uses gasoline and alcohol as fuel, to execute air-fuel ratio feedback control. When a final fuel injection amount QFIN is below a minimum injection amount Qmin (S202: YES), and if alcohol concentration of fuel is higher than the determination concentration and a water temperature THW is lower than the determination upper-limit temperature Tmax (S203: NO), calculation of a feedback correction coefficient FAF is forcibly stopped (S205). When the final fuel injection amount QFIN is below the minimum injection amount Qmin (S202: YES), and further, if the above determination condition is established (S203: YES), the calculation of the feedback correction coefficient FAF is continued (S204). <P>COPYRIGHT: (C)2012,JPO&INPIT |
