Method for controlling clutch actuator for automated manual transmission

A method for controlling a clutch actuator for an automated manual transmission, where the clutch actuator is configured to form an operation hydraulic pressure of a clutch while a piston of the clutch actuator reciprocally operates in a hydraulic chamber of a cylinder body by a cam slide driven by a motor in a housing, and the cylinder body is formed with an orifice hole connecting the hydraulic chamber and a reservoir tank, the method comprising:

• collecting, by a controller, driving information for a shift control of the automated manual transmission from a driving information detection unit;
• determining, by the controller, whether an actual stroke position of the clutch actuator is in a moved-forward state by more than a predetermined stroke position, based on the driving information;
• when the actual stroke position of the clutch actuator is in the moved-forward state by more than the predetermined stroke position, outputting, by the controller, a first target stroke signal to follow a sensor stroke signal based on an operation of a driver, through a feedback control;
• when the actual stroke position of the clutch actuator is in a moved-forward state by less than the predetermined stroke position, outputting, by the controller, a second target stroke signal for enabling the clutch actuator to stand by at a control-standby stroke position where a hydraulic pressure of the hydraulic chamber forms pressure equilibrium with an atmospheric pressure;
• and
• performing, by the controller, a pressure equilibrium control, where the controller counts an actual control-standby period while the clutch actuator standing by at the control-standby stroke position, and moves the clutch actuator to the predetermined stroke position by a predetermined operation speed only when a target control-standby period is satisfied, and a stroke position calculated from the sensor stroke signal is in a moved-forward position by more than the predetermined stroke position.