Hydraulic system

A hydraulic system comprising:

• an operation device that outputs an operation signal corresponding to an operating amount of an operating unit;
• a pump that supplies hydraulic oil to a hydraulic actuator via a control valve;
• a bleed valve that defines a bleed flow rate, at which the hydraulic oil discharged from the pump is released to a tank;
• and
• a controller that controls the bleed valve, such that an opening area of the bleed valve decreases in accordance with increase in the operation signal outputted from the operation device, wherein
• the controller determines whether or not a rapid acceleration operation is performed on the operation device, and
• the controller:
• in a case where the rapid acceleration operation is not performed, changes the opening area of the bleed valve between a maximum value and zero along a normal opening line;
• and
• in a case where the rapid acceleration operation is performed, changes the opening area of the bleed valve between the maximum value and a minimum value greater than zero along a special opening line from when the rapid acceleration operation is started until when a predetermined time elapses.