Electric brake system

An electric brake system comprising:

• a first block in which a mechanical part mechanically operated in conjunction with a brake pedal is disposed;
• a second block in which an electronic part electronically operated and controlled by an electronic control unit is disposed, wherein the second block is spaced apart from the first block;
• an emergency module operating when the electronic part is inoperative and providing hydraulic pressure to a wheel cylinder in an auxiliary manner;
• and
• a connecting line hydraulically connecting the first block, the second block, and the emergency module to each other,
• wherein the mechanical part includes a master cylinder equipped with a main reservoir in which a pressurized medium is stored, a master piston connected to the brake pedal, and a master chamber whose volume is varied by a displacement of the master piston,
• the electronic part includes a hydraulic pressure supply device generating hydraulic pressure by operating a hydraulic piston by an electrical signal output in response to a displacement of the brake pedal or an electrical signal output from the electronic control unit, a hydraulic pressure control unit equipped with a plurality of flow paths and valves to control the hydraulic pressure transmitted from the hydraulic pressure supply device to the wheel cylinder, a pedal simulator, and a sub reservoir in which the pressurized medium is stored,
• the emergency module includes a hydraulic pressure auxiliary device operating when the hydraulic pressure supply device is inoperative to provide the hydraulic pressure to the wheel cylinder,
• the hydraulic pressure control unit includes a first hydraulic circuit that controls hydraulic pressure transmitted to a first wheel cylinder and a second wheel cylinder, and
• the connecting line includes a first connecting line connecting the master chamber and a front end of the first hydraulic circuit, a second connecting line directly connecting the master chamber and the pedal simulator, a third connecting line connecting the main reservoir and the sub reservoir, and a fourth connecting line connecting the emergency module to the third connecting line.