BRAKE SYSTEM FOR VEHICLES

A brake system for vehicles includes a backup cylinder body, a backup piston located in the backup cylinder body, and configured to be movable by pressing of a pedal, a pedal simulator piston movably provided in the backup cylinder body, and spaced apart from the backup piston, a first backup chamber defined in the backup cylinder body by the backup piston and the pedal simulator piston, and configured to store brake fluid, a first spring located in the first backup chamber, and configured to elastically support the backup piston and the pedal simulator piston, a stopper located in the backup cylinder body, and configured to restrict movement of the pedal simulator piston, and a damper located between the stopper and the pedal simulator piston, and configured to deform in response to movement of the pedal simulator piston toward the stopper.