| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel injection control device capable of accurately correcting a fuel injection quantity, by further accurately grasping a property of using fuel, by eliminating influence of an angular velocity variation in an internal combustion engine caused by a difference in the fuel injection timing in a cycle of the internal combustion engine. SOLUTION: This fuel injection control device performs predetermined two times of fixed time injection in a plurality of times (S35) when detecting a non-injection state of an internal combustion engine, and determines the angular velocity variationΩzfc2 of the respective internal combustion engines when performing the two times of fixed time injection in a plurality of times, and subtracts the angular velocity variation corresponding to an injection interval from an angular velocity variation value when performing the determined two times of fixed time injection based on the angular velocity variation in the internal combustion engine only by a difference in a prestored injection interval, and estimates a fuel property of fuel in response to a period of pressure pulsation of the fuel determined based on a valueΔΩzfc2 provided by substraction, and corrects a target fuel injection quantity or a driving signal of a fuel injection valve based on the fuel property. COPYRIGHT: (C)2011,JPO&INPIT
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