Current control device

A current control device configured to control a current of a solenoid of a solenoid valve, the current control device comprising:

• a current acquisition unit configured to acquire an excitation current of the solenoid;
• a steady control unit configured to execute a steady control in which an operation of deenergizing the solenoid after energizing the solenoid is repeated in a predetermined on-off cycle to keep an average value of the excitation current in a vicinity of a target current;
• a target determination unit configured to determine whether the target current has been changed at every predetermined target determination cycle shorter than the on-off cycle when the steady control is executed;
• a full-on control unit configured to bring the solenoid into a full-on state in which the solenoid is constantly energized at a first timing that arrives in a predetermined control transition cycle shorter than the on-off cycle after the target current has been changed to an upper side;
• a full-on determination unit configured to determine whether the excitation current has become equal to or larger than a full-on threshold larger than the target current when the solenoid is in the full-on state;
• a full-off control unit configured to bring the solenoid into a full-off state in which the solenoid is constantly deenergized at a first timing that arrives in a predetermined energization switching cycle shorter than the on-off cycle after the excitation current has become equal to or larger than the full-on threshold;
• a full-off determination unit configured to determine whether the excitation current has become equal to or smaller than a full-off threshold smaller than the target current when the solenoid is in the full-off state;
• and
• a control transition unit configured to cause a transition to the steady control at a first timing that arrives in the control transition cycle after the excitation current has become equal to or smaller than the full-off threshold.