Patent ID: 8506020

Claim:
A brake control system, comprising: a master-cylinder including a primary piston that is activated by a brake pedal; a primary fluid chamber that produces hydraulic pressure by a movement of the primary piston; a secondary piston that is moved with the hydraulic pressure in the primary fluid chamber and a secondary fluid chamber that produces hydraulic pressure by a movement of the secondary piston; a first mechanism that regulates a pressure inside the master-cylinder according to an amount of operation of the brake pedal; a first control apparatus that controls an operation of the first mechanism; a second mechanism that regulates communication of the pressure inside the master-cylinder to a wheel-cylinder; and a second control apparatus that controls an operation of the second mechanism and an operation of a pump apparatus that increases a pressure that is communicated to the wheel-cylinder; wherein: the first and second control apparatus each comprises a built-in power supply circuit and a CPU; and the master cylinder is provided with a first hydraulic pressure sensor that measures a pressure inside the primary fluid chamber in the master-cylinder and is electrically connected to the first control apparatus; and a second hydraulic pressure sensor that measures a pressure inside the primary fluid chamber in the master-cylinder and is electrically connected to the second control apparatus; and wherein the first hydraulic pressure sensor is supplied with a power supply voltage from the first control apparatus; and the second hydraulic pressure sensor is supplied with a power supply voltage from the second control apparatus.