FUEL INJECTION CONTROL DEVICE

摘要

PROBLEM TO BE SOLVED: To properly perform a fail-safe processing even when fuel pressure detected by a plurality of fuel pressure sensors belongs to a normal possible range and a deviation of fuel pressure by two prescribed fuel pressure sensors is smaller than a prescribed decision value. SOLUTION: The device is provided with the plurality of fuel pressure sensors 44 and 45 for detecting each pressure of fuel within a common-rail 25 and an electronic control unit(ECU) 46. When each detected value of the two prescribed fuel pressure sensor 44 and 45 belongs to the normal possible range and the deviation of both detected values is smaller than the prescribed decision value, the ECU 46 sets the detected higher value as fuel pressure. The ECU 46 determines an injection period based on fuel injection quantity according to an operation state of an engine 11 and the fuel pressure, and controls a fuel injection valve 23 so as to inject fuel over the injection period.