Patent ID: 7063393

Claim:
An electronic brake system including: a brake pedal operable according to a requisite braking force; a failsafe cylinder for generating a brake fluid pressure in conjunction with operation of the brake pedal; wheel cylinders equipped at respective vehicle wheels, for generating respective braking forces at the respective vehicle wheels; a master cylinder for generating brake fluid pressure and applying the brake fluid pressure to the wheel cylinders to generate the respective wheel pressures; and a motor for controlling the brake fluid pressure in the master cylinder; wherein the electronic brake system is operative in a first operational mode and a second operational mode is operative, in the first operational mode, brake fluid pressures in the wheel cylinders are generated based on the brake fluid pressure in the master cylinder with driving of the motor, and in the second operational mode, the brake fluid pressures in the wheel cylinders are generated based on the brake fluid pressure generated in the failsafe cylinder without driving the motor; and, in the second operational mode, the brake fluid pressure in the master cylinder is controlled by the brake fluid pressure generated in the failsafe cylinder, and the controlled brake fluid pressure in the master cylinder is provided to the wheel cylinders to control the respective brake fluid pressures in the wheel cylinders.