| 摘要 |
PROBLEM TO BE SOLVED: To provide a control apparatus of a fuel supply system capable of properly performing fuel injection control by considering the pressure fluctuation of the fuel to be fed to a fuel injection valve. SOLUTION: The system includes: a high-pressure pump 25 as a fuel pump for pressurizing and discharging the fuel; the fuel injection valve 23 for injecting the fuel discharged from the high-pressure pump 25; and a fuel pressure sensor 29 for detecting the fuel pressure, the pressure of the fuel discharged from the high-pressure pump 25 to be fed to the fuel injection valve 23. An ECU 50 calculates the quantity of fuel injection based on the operating condition of an engine 10, and injects the fuel by the fuel injection valve 23 at prescribed timing thereafter. The ECU 50 controls the feedback of the fuel pressure based on the deviation between the actual fuel pressure detected by the fuel pressure sensor 29 and a target fuel pressure. Specifically, the ECU 50 estimates the fuel pressure at the timing of injection based on a feedback controlled variable in the fuel pressure feedback control, and controls the fuel injection valve 23 based on the estimated fuel pressure. COPYRIGHT: (C)2011,JPO&INPIT
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