Brake apparatus

A brake apparatus comprising:

• a reservoir in which oil is accommodated;
• a master cylinder fluidically connected to the reservoir;
• a pedal simulator fluidically connected to the master cylinder and into which the oil flows;
• and
• a brake pedal connected to the master cylinder and configured to be moved in response to a driver's operation,
• wherein the master cylinder includes:
• a first piston movably provided in a first bore of the master cylinder;
• and
• a second piston provided in a second bore of the master cylinder and movable by the first piston,
• wherein the pedal simulator and the master cylinder are fluidically connected to each other by a connection line through which the oil flows, and
• wherein the connection line is provided with a first valve controlling the flow of the oil to control movement of the second piston,
• wherein the master cylinder further includes:
• a cylinder housing including an internal space;
• a cylinder rod connecting the first piston and the brake pedal;
• a first spring including a first end portion supported by the first piston and a second end portion supported by the second piston;
• a second spring including a first end portion supported by the second piston and a second end portion supported by a first stopper provided in the cylinder housing;
• and
• a first damper disposed between the second piston and the first stopper.