Patent ID: 7389968

Claim:
A proportional solenoid valve control device outputting a driving signal corresponding to a command signal to a solenoid for driving a valve body to control an opening degree of a fluid flow path by the valve body, the control device comprising: a driving signal control circuit including a valve fully-closing variable resistor that sets a fully-closing value of the driving signal based on a control signal corresponding to a valve fully-closing state and a valve fully-opening variable resistor that sets a fully-opening value of the driving signal based on a control signal corresponding to a valve fully-opening state, the driving signal control circuit converting the control signal corresponding to a valve opening degree to the driving signal and supplying the driving signal to the proportional solenoid valve; and a mode selecting switch set at an auto-mode position for converting the control signal to the driving signal and supplying the driving signal to the proportional solenoid valve, a valve fully-closing manual position for supplying a valve fully-closing manual signal corresponding to a valve fully-closing position of the proportional solenoid valve to the driving signal control circuit, and a valve fully-opening manual position for supplying a valve fully-opening manual signal corresponding to a valve fully-opening position of the proportional solenoid valve to the driving signal control circuit, wherein under a state where the mode selecting switch is set at the valve fully-closing manual position, a value of the driving signal at a time of a valve fully-closing state is corrected by the valve fully-closing variable resistor, and under a state where the mode selecting switch is set at the valve fully-opening manual position, the value of the driving signal at the time of the valve fully-opening state is corrected by the valve fully-opening variable resistor.