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

Claim 0:
1. 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;
wherein the control unit determines whether or not the closing of the solenoid valve has succeeded or calculates the discharge amount by closing the solenoid valve, based on a measurement signal output from a fuel pressure sensor attached to the fuel rail; and
wherein the control unit determines whether or not the closing of the solenoid valve has succeeded or calculates the discharge amount by closing the solenoid valve, by performing filter processing on the measurement signal output from the fuel pressure sensor and comparing the measurement signal after the filter processing with a predetermined threshold value.