Patent ID: 11859584
Assignee: HITACHI ASTEMO, LTD.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 4:
5. A solenoid valve control device that controls opening and closing of a solenoid valve in an internal combustion engine system including a fuel pump and a fuel rail that accumulates fuel discharged by the fuel pump, the fuel pump including a plunger that increases or decreases a volume of a pressurizing chamber by moving up and down with rotation of a pump drive cam, the solenoid valve for sucking fuel into the pressurizing chamber, and a discharge valve for discharging fuel in the pressurizing chamber, the solenoid valve control device comprising:
a control unit that determines whether or not closing of the solenoid valve has succeeded based on fuel pressure of the fuel rail, or calculates a discharge amount by closing the solenoid valve based on the fuel pressure of the fuel rail; and
wherein the control unit corrects a peak value of a drive current supplied to the solenoid valve to a value lower than a setting value at a current time when determining that the closing of the solenoid valve has succeeded, and corrects the peak value of the drive current supplied to the solenoid valve to a value higher than the setting value at the current time when determining that the closing of the solenoid valve has failed.