초록 ▼

An electromechanical brake system for a vehicle has a brake actuator installed to each wheel of the vehicle and a controller for controlling an operation of each brake actuator. The brake actuator is constituted to clamp a disc rotor by a pair of brake pads through a rotational motion converting mec

An electromechanical brake system for a vehicle has a brake actuator installed to each wheel of the vehicle and a controller for controlling an operation of each brake actuator. The brake actuator is constituted to clamp a disc rotor by a pair of brake pads through a rotational motion converting mechanism according to an operation of the motor. The rotational motion converting mechanism is constituted by a screw shaft integrally connected to a rotation shaft of the motor and a ball screw screwed with the screw shaft and integrally connected to one of the pair of brake pads. When the vehicle is put in a stopping state, the controller drives the motor so that an ordinary use region of the screw shaft, which is contacted with balls of the ball nut during a brake operation, is faced with a lubricant hole formed at an end portion of the ball nut.

대표청구항 ▼

1. An electromechanical brake system for a vehicle, comprising:a brake actuator installed to each wheel of the vehicle, said brake actuator comprising a motor; a disc rotor integrally connected to each wheel of the vehicle, a pair of brake pads for clamping the disc rotor according to the operation

1. An electromechanical brake system for a vehicle, comprising:a brake actuator installed to each wheel of the vehicle, said brake actuator comprising a motor; a disc rotor integrally connected to each wheel of the vehicle, a pair of brake pads for clamping the disc rotor according to the operation of the motor, and a rotational motion converting mechanism for converting rotational motion of the motor into linear motion to move the brake pad relative to the disc rotor; a brake pedal sensor that detects a depression quantity of a brake pedal of the vehicle; and a controller connected to said brake actuator and said brake pedal sensor, said controller driving the motor of said brake actuator within a braking operation range in which a braking force is generated according to the depression quantity of the brake pedal, and driving the motor over the brake operation range when the vehicle is put in a vehicle stop state.