| 摘要 |
PROBLEM TO BE SOLVED: To secure the control accuracy of fuel injection control reflecting an alcohol concentration of fuel even if vapor is generated in the fuel, and the detection accuracy of an alcohol concentration sensor is deteriorated. SOLUTION: When a fuel temperature detected by a fuel temperature sensor 31 is not higher than a prescribed limit temperature, it is determined that the detection accuracy of the alcohol concentration sensor 36 is high since vapor is not generated in the fuel, fuel injection control is executed by using a current alcohol concentration detection value of the fuel accurately detected by the alcohol concentration sensor 36, and the alcohol concentration detection value is stored in a rewritable nonvolatile memory such as a backup RAM of an ECU 37. When the fuel temperature is higher than the limit temperature, it is determined that the detection accuracy of the alcohol concentration sensor 36 may be deteriorated since vapor may be generated in the fuel, fuel injection control is executed by using the alcohol concentration stored value of the fuel stored in the backup RAM of the ECU 37 or the like. COPYRIGHT: (C)2010,JPO&INPIT
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