FUEL-INJECTION CONTROL METHOD AND FUEL-INJECTION CONTROL DEVICE

摘要

Accurate fuel-injection control is effected in response to a fuel-injection request of the engine without being influenced by a variation of the voltage of the power supply and a variation of the coil temperature of the fuel-injection solenoid and by other disturbances. The fuel-injection solenoid is driven/controlled according to the actual current integrated value of the coil current after the start of drive of the fuel-injection solenoid. A fuel-injection control method comprises the steps of starting drive of a fuel-injection solenoid, detecting the actual current integrated value of the coil current flowing through the solenoid after the start of the drive, comparing the actual current integrated value with a reference current integrated value predetermined for the drive pulse width of the solenoid corresponding to the requested fuel-injection amount, and correcting the drive pulse width of the solenoid according to the comparison. The solenoid is driven/controlled according to the corrected drive pulse width.