Electric brake system and method of controlling the same

Abstract

Disclosed herein is an electric brake system including a reservoir in which a pressurizing medium is stored, an integrated master cylinder including a master piston connected to a brake pedal and a master chamber having a volume changed by a displacement of the master piston, a hydraulic pressure supply device including a first pressure chamber provided in front of a hydraulic piston and a second pressure chamber provided behind the hydraulic piston and configured to move the hydraulic piston forward or backward to generate a hydraulic pressure, first and second hydraulic circuits configured to control a flow of the pressurizing medium supplied to a wheel cylinder, a hydraulic pressure control unit configured to control the flow of the pressurizing medium provided from the hydraulic pressure supply device to the first and second hydraulic circuits, a connection flow path connecting the master chamber and the second pressure chamber, a control valve provided on the connection flow path to control the flow of the pressurizing medium, and a controller electrically connected to the control valve, wherein the controller is configured to open the control valve to supply the pressurizing medium from the master chamber to the second pressure chamber in response to a sudden braking request by a driver.