Patent ID: 8515653

Claim:
A drive control method of a flow rate control valve in a common rail type fuel injection control apparatus, comprising the steps of: using an integral value of a difference between a target current and an actual current in feedback control of an energization current of the flow rate control valve such that an actual current of the flow rate control valve becomes closer to the target current, the flow rate control valve controlling an amount of fuel supplied to a high pressure pump that pressure feeds high pressure fuel to a common rail; when an ignition switch is turned on, setting an initial value in an integral calculation that calculates an integral value of the difference between the target current and the actual current to a predetermined value to supply the target current at that time point to the flow rate control valve; and setting a second integral gain that is larger than a first integral gain that is used under normal conditions as an integral gain in the integral calculation during a predetermined time period after the ignition switch is turned on, while setting the first integral gain as the integral gain after the predetermined time period elapses.