FUEL INJECTION CONTROL DEVICE

摘要

PROBLEM TO BE SOLVED: To improve startability of an engine with a fuel injection control device having a common rail incorporated therein.

SOLUTION: This fuel injection control device 1 includes: a fuel injection valve 2 injecting fuel into a cylinder; the common rail 3 storing fuel supplied to the fuel injection valve 2 in a pressurized state; a pressure accumulation chamber 4 connected to the common rail 3 through a communication passage 5; a supply pump 6 supplying high-pressure fuel to the common rail 3; an SCV 6a metering the pumping amount of the supply pump 6; a selector valve 9 arranged on the communication passage 5 and changing over the communicating state of the common rail 3 with the pressure accumulation chamber 4; a first pressure sensor 13 detecting rail pressure in the common rail 3; a second pressure sensor 14 detecting pressure of fuel in the pressure accumulation chamber 4; and an ECU 8 controlling the opening/closing conditions of the SCV 6a and selector valve 9 based on information on pressure detected by the first pressure sensor 13 and second pressure sensor 14.

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