| 摘要 |
PROBLEM TO BE SOLVED: To provide a fuel injection quantity control device of an internal combustion engine capable of properly controlling a fuel injection quantity by properly controlling the valve opening timing of a fuel injection valve. SOLUTION: This fuel injection quantity control device of an internal combustion engine comprises a valve opening time calculation means for calculating the valve opening timing of an injector 17 according to the operating state of the engine 10 and regulates the fuel injection quantity by controlling the valve opening timing of the injector 17. The fuel injection quantity control device comprises a pump rotational speed acquiring means for acquiring the rotational speed of a fuel pump 4 by calculation, a fuel pressure estimating means for estimating the pressure of the fuel jetted from the fuel pump 46 through the injector 17 according to the rotational speed of the fuel pump 46 acquired by the pump rotational speed acquiring means by using preset pump characteristics, and a valve opening timing correction means for correcting the valve opening timing of the injector 7 according to the fuel pressure estimated by the fuel pressure estimating means. COPYRIGHT: (C)2008,JPO&INPIT
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