SOLENOID VALVE CONTROL SYSTEM, A CONTROL VALVE SYSTEM, AND A METHOD OF CONTROLLING ELECTRONIC VALVE

摘要

A solenoid valve control system comprising a solenoid valve drive circuit applying a drive current to the solenoid valve; a pressure data calculation unit calculating a pressure data including a band and a cycle of pressure fluctuation from a pressure value; a pressure hysteresis calculation unit calculating a difference between the pressure value when the drive current value is increased and the pressure value when the drive current value is decrease as a hysteresis amount; a vibration determination unit determining whether or not the pressure data is included in an area outside the pressure data range, which is outside a first predetermined range; a hysteresis determination unit determining whether or not the pressure hysteresis amount is included in an area outside the pressure hysteresis amount range, which is outside a second predetermined range; and a drive frequency adjustment unit adjusting a drive frequency based on the determination result.

主权项

1. A solenoid valve control system for controlling a solenoid valve interposed between an input side and an output side of a flow path for oil, comprising:
a solenoid valve drive circuit which applies a drive current to the solenoid valve based on designated drive current value and drive frequency; a pressure data calculation unit which calculates a pressure data including a pressure fluctuation band and a pressure fluctuation cycle from a pressure value of the oil on the output side of the solenoid valve; a pressure hysteresis calculation unit which calculates a difference between the pressure value when the drive current value is increased and the pressure value when the drive current value is decreased as a hysteresis amount; a vibration determination unit which determines whether or not the pressure data is included in an area outside the pressure data range, which is outside a first predetermined range; a hysteresis determination unit which determines whether or not the pressure hysteresis amount is included in an area outside the pressure hysteresis amount range, which is outside a second predetermined range; and a drive frequency adjustment unit which adjusts a drive frequency based on the determination result from the vibration determination unit and the hysteresis determination unit.