Electronic brake system

An electronic brake system comprising:

• a first block in which a mechanically operated mechanism part is arranged in cooperation with a brake pedal;
• a second block in which an electronic part that is electronically operated and controlled by an electronic control unit is arranged, and which is arranged spaced apart from the first block;
• and
• a connecting line for hydraulically connecting the first block and the second block to each other,
• wherein the mechanism part comprises a master cylinder including a first master piston connected to the brake pedal, a first master chamber whose volume is variable by a displacement of the first master piston, a second master piston which is provided so as to be displaceable by a hydraulic pressure in the first master chamber, and a second master chamber which is variable in volume by a displacement of the second master piston;
• the electronic part comprises a hydraulic control unit including a test valve, a pedal simulator, a hydraulic pressure supply device for generating hydraulic pressure by actuating a hydraulic piston by an electric signal, a first hydraulic circuit for controlling hydraulic pressure transmitted to first and second wheel cylinders, and a second hydraulic circuit for controlling the hydraulic pressure to be transmitted to third and fourth wheel cylinders, and
• the connecting line comprises:
• a first connecting line having one end connected to the first master chamber and the other end connected to the side of the first hydraulic circuit;
• and
• a second connecting line having one end connected to the second master chamber and the other end branched and connected to each of the pedal simulator and the second hydraulic circuit side, wherein the test valve is provided at a front end of a branched point of the second connecting line where the second connecting line is branched to the pedal simulator and the second hydraulic circuit side,
• wherein the first hydraulic circuit comprises a first inlet valve and a second inlet valve that control a flow of a pressurizing medium supplied from the hydraulic supply device to the first wheel cylinder and the second wheel cylinder, respectively, and a first outlet valve and second outlet valve that respectively control a flow of a pressurizing medium discharged from the first and second wheel cylinders;
• the second hydraulic circuit comprises a third inlet valve and a fourth inlet valve for controlling a flow of a pressurizing medium supplied from the hydraulic pressure supply device to the third wheel cylinder and the fourth wheel cylinder, respectively, and a third outlet valve and a fourth outlet valve for respectively controlling a flow of a pressurizing medium discharged from the third and fourth wheel cylinders;
• the other end of the first connecting line connected to the side of the first hydraulic circuit is connected between the first inlet valve and the first outlet valve and is in direct communication with the first wheel cylinder;
• and
• the other end of the second connecting line connected to the side of the second hydraulic circuit is connected between the fourth inlet valve and the fourth outlet valve and is in direct communication with the fourth wheel cylinder.