FUEL SUPPLY DEVICE OF INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To provide a fuel supply device of an internal combustion engine in which a desired fuel pressure can be set during the operation of the engine.

SOLUTION: The fuel supply device of an internal combustion engine comprises: a means for detecting the pressure of a fuel pumped from a fuel tank to a fuel injection valve through a fuel pump; a means for detecting the operating state of the internal combustion engine; a means for calculating the target value of a fuel pressure according to the operating conditions; a means for so controlling the drive force of the fuel pump that the fuel pressure reaches the target value; a recirculating passage for recirculating a part of the fuel discharged from the fuel pump into a fuel injection valve to the fuel tank; and an opening/closing valve for opening and closing the recirculating passage according to the fuel pressure. The fuel supply device is characterized by comprising a means for detecting the operating pressure of the opening/closing valve, and setting the lower limit value of the target value according to the detected operating pressure of the opening/closing valve.

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