device and method for decreasing brake judder of anti brake system for vehicles

摘要

PURPOSE: A brake judder reducing apparatus of an anti-lock brake system for a vehicle and a method thereof are provided to prevent judder by separating a disk from a pad with opening and closing a solenoid valve corresponding to a wheel in detecting judder. CONSTITUTION: A brake judder reducing device of an anti-lock brake system for a vehicle is composed of a control unit(10) detecting judder by comparing frequency of data from a sensor in operating a brake; a hydraulic pressure control unit(20) applying hydraulic pressure of brake fluid from a master cylinder(31) to a wheel cylinder of a caliper(40) in braking, and separating a disk from a pad by opening and closing a solenoid valve(30) corresponding to the wheel in detecting judder; and a vibration detecting sensor(50) installed in the caliper of the wheel to transmit to the control unit by measuring vibration. The control unit decides driving of the solenoid valve by comparing vibration with the reference value, and outputs a signal to the hydraulic pressure control unit. Driving experience is improved with detecting judder by the vibration detecting sensor and restricting judder by the control unit. Performance is improved with simple structure.