Patent ID: 7823985

Claim:
A brake system comprising: a master cylinder that generates brake fluid pressure by a braking operation of a driver; an electric motor-driven slave cylinder that generates brake fluid pressure according to an electrical signal based on the braking operation of the driver; a wheel cylinder that brakes a wheel by the brake fluid pressure of the master cylinder or the slave cylinder; a brake light that informs a following vehicle of the operation of the wheel cylinder; and a first sensor and a second sensor that detect stroke positions of the brake pedal, wherein the brake fluid pressure of the slave cylinder is transmitted to the wheel cylinder when the slave cylinder operates normally, and the brake fluid pressure of the master cylinder is transmitted to the wheel cylinder through the slave cylinder when the slave cylinder does not operate normally, and wherein the first sensor activates the brake light based on a timing at which the slave cylinder generates brake fluid pressure when the slave cylinder operates normally, and the second sensor activates the brake light based on a timing at which the master cylinder generates brake fluid pressure when the slave cylinder does not operate normally.