| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fuel injection control device for preventing an excessive increase in fuel pressure in a pressure accumulating chamber, even in a predetermined rotating speed area where a minimum delivery flow rate of a high pressure pump exceeds zero. <P>SOLUTION: This fuel injection control device of an internal combustion engine has a fuel injection valve control means 101 for controlling driving of a fuel injection valve by arithmetically operating a basic fuel injection flow rate being the target air-fuel ratio corresponding to an engine operation state, a fuel pressure sensor 61 for detecting the fuel pressure in the pressure accumulating chamber, a delivery quantity control valve 10 for controlling a fuel quantity supplied to the pressure accumulating chamber from the high pressure pump, and a fuel pressure control means 105 for controlling the delivery quantity control valve so that the fuel pressure in the pressure accumulating chamber coincides with target fuel pressure. The fuel injection control device is provided with a fuel increasing quantity correcting means 102 for increasing the basis fuel injection flow rate in a state of becoming higher in the fuel pressure in the pressure accumulating chamber than the target fuel pressure when an engine speed of an engine falls within the predetermined rotating speed area where the minimum delivery flow rate of the high pressure pump is expected to exceed zero. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
