Brake pedal device and brake system

A brake pedal device used for a brake system in which an electronic control unit is configured to detect an operation amount of a brake pedal based on an output signal of a sensor group provided in the brake pedal device, and is configured to control a drive of a brake circuit, the brake pedal device comprising:

• a housing to be fixed to a vehicle;
• a brake pedal provided to be swingable about a predetermined axis with respect to the housing and to receive a depression operation of a driver;
• and
• at least three sensors configured to output signals according to the operation amount of the brake pedal, wherein
• the at least three sensors include at least three inductive sensors,
• each of the at least three inductive sensors includes a target metal that moves together with the brake pedal, and a sensing coil configured to detect a movement of the target metal, and
• the at least three inductive sensors are spaced from each other such that the movement of the target metal of one inductive sensor is detected by the sensing coil of the one inductive sensor but the movement of the target metal of any other inductive sensors is not detected by the sensing coil of the one inductive sensor.

A brake system driving and controlling a brake circuit that performs braking of a vehicle, the brake system comprising:

• a brake pedal device including
• a housing to be fixed to the vehicle;
• a brake pedal provided to be swingable about a predetermined axis with respect to the housing, and to be pedaled by a driver;
• and
• at least three sensors configured to output signals according to an operation amount of the brake pedal, and
• a controller configured to detect the operation amount of the brake pedal based on output signals of the at least three sensors and to control of a drive of the brake circuit, wherein
• the at least three sensors include (i) at least one magnetic sensor and at least two inductive sensors, or (ii) at least three inductive sensors, and
• the inductive sensors are spaced from each other such that a movement of a target metal of one inductive sensor is detected by a sensing coil of the one inductive sensor but a movement of a target metal of any other inductive sensors is not detected by the sensing coil of the one inductive sensor.