Patent ID: 9531306
Filing Date: 2016-12-27
CPC Classification: B60T,B60W,H02P

Claim Text:
1. An electronic stability control system, comprising: a motor unit configured to be connected to a hydraulic pump pumping a brake fluid discharged from a wheel cylinder and circulating the brake fluid to the wheel cylinder again to operate the hydraulic pump depending on a PWM signal; a pulse width modulator configured to generate a PWM signal for driving the motor unit depending on a predetermined control signal; a motor driver configured to include a motor switch for driving the motor unit depending on the PWM signal and a freewheeling switch and a reverse protection switch for checking whether the motor unit is normally operated; a power supply unit configured to supply power for an operation of the motor unit, the pulse width modulator, and the motor driver; and a controller configured to turn off all of the motor switch, the freewheeling switch, and the reverse protection switch, turn off only the motor switch and the reverse protection switch, or turn off only the motor switch and the freewheeling switch, apply a diagnostic current, and then detect a fault state of the freewheeling switch or the reverse protection switch, or the freewheeling switch and the reverse protection switch by using a voltage detector.