Electronic brake system and method for operating same

An electronic brake system comprising:

• a reservoir in which a pressurized medium is stored;
• an integrated master cylinder having a simulation chamber, a first master chamber, and a second master chamber arranged in order from a side of a brake pedal;
• a reservoir flow path communicating the integrated master cylinder with the reservoir;
• a hydraulic pressure supply device configured to generate a hydraulic pressure by operating according to an electrical signal output in response to a displacement of the brake pedal;
• a first hydraulic circuit and a second hydraulic circuit configured to control a flow of the hydraulic pressure transferred to a wheel cylinder;
• and a hydraulic control unit configured to control a flow of the hydraulic pressure transferred to the first hydraulic circuit and the second hydraulic circuit, wherein the integrated master cylinder includes a simulation piston provided to be displaceable by the brake pedal and configured to pressurize the simulation chamber, a first master piston configured to pressurize the first master chamber and having a diameter smaller than a diameter of the simulation piston, a second master piston configured to pressurize the second master chamber and having a diameter smaller than a diameter of the first master piston, and an elastic member interposed between the simulation piston and the first master piston to provide the brake pedal with a reaction force;
• wherein the hydraulic pressure supply device includes a first pressure chamber and a second pressure chamber pressurized according to a forward movement and a backward movements, respectively, of a hydraulic piston, wherein the hydraulic control unit comprises:
• a first hydraulic flow path in communication with the first pressure chamber;
• a second hydraulic flow path in communication with the second pressure chamber;
• a third hydraulic flow path at which the first hydraulic flow path and the second third hydraulic flow path join;
• a fourth hydraulic flow path branched from the third hydraulic flow path and connected to the first hydraulic circuit;
• a fifth hydraulic flow path branched from the third hydraulic flow path and connected to the second hydraulic circuit;
• a sixth hydraulic flow path in communication with the first hydraulic circuit;
• a seventh hydraulic flow path in communication with the second hydraulic circuit;
• an eighth hydraulic flow path at which the sixth hydraulic flow path and the seventh hydraulic flow path join;
• a ninth hydraulic flow path branched from the eighth hydraulic flow path and connected to the first pressure chamber;
• and
• a tenth hydraulic flow path branched from the eighth hydraulic flow path and connected to the second pressure chamber.