| 摘要 |
This control device is provided for use in industrial vehicles that are equipped with: a cargo loading platform; an actuator for driving the cargo loading platform; a hydraulic circuit that supplies hydraulic fluid to the actuator and that includes an electromagnetically operated multi-control valve in which the aperture is varied by changing the magnitude of a control current supplied to a solenoid; and an operation unit for receiving an operation to change the aperture of the electromagnetically operated multi-control valve and outputting a signal that indicates the operation amount. The control device at least performs: a control for determining the mean value of the magnitude of the control current corresponding to the aperture of a proportional valve that is the electromagnetically operated multi-control valve, said determination being based on the signal that indicates the operation amount and is output from an operation lever that is the operation unit; a control for determining, with the aperture of the proportional valve as a parameter, the magnitude of the dither current, which is an AC component, that should be added; and a control for outputting the control current to the proportional valve (42), the control current having the AC component of a magnitude determined by the control for determining the magnitude of the AC component using the magnitude determined by the mean value based on the aperture of the proportional valve. |
