| 摘要 |
PROBLEM TO BE SOLVED: To highly accurately calculate a fuel injection quantity by reducing the effect of a detection error of an atmospheric pressure sensor in calculating the fuel injection quantity. SOLUTION: After reading an intake pressure PM, the atmospheric pressure PA and an engine rotation speed NE (steps 101-103), this fuel injection control device calculates an intake air pressure correction factor KPM according to the atmospheric pressure PA, and corrects the intake pressure PM by the intake air pressure correction factor KPM into a reference intake air pressure PML under a reference air pressure PAbase (steps 104 and 105). Then, this control device finds a reference relative pressure DPML from a differential pressure between the reference intake air pressure PML and the reference air pressure PAbase and calculates a basic injection time TP from a map, etc., based on the reference relative pressure DPML and the engine rotation speed NE (steps 106 and 107). Secondly, this control device calculates an injection quantity correction factor KPA according to the atmospheric pressure PA, various types of correction factors K, and an invalid injection time TV and calculates a last fuel injection time TAUINJ (steps 108-110).
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