Patent ID: 6328390
Filing Date: 2001-12-11
Classification: B60T

Abstract:
A brake control system for a vehicle comprising:wheel brake cylinders operatively mounted on front and rear wheels of said vehicle, respectively;a master cylinder for pressurizing brake fluid to supply hydraulic pressure to said wheel brake cylinders in response to depression of a brake pedal;a pair of main passages for communicating said master cylinder with said wheel brake cylinders to provide a dual hydraulic pressure circuit system;a pair of first valve means for opening or closing said main passages, respectively;a pair of pump means disposed between said first valve means and said wheel brake cylinders in said main passages, respectively, said pump means introducing from an inlet thereof the brake fluid and pressurizing the brake fluid to supply the hydraulic braking pressure to said wheel brake cylinders;a pair of auxiliary passages for communicating each inlet of said pump means with said master cylinder;a pair of second valve means for opening or closing said auxiliary passages, respectively;wheel speed sensors for detecting wheel speeds of said wheels;slip calculation means for calculating slip of said wheels on the basis of the wheel speeds detected by said wheel speeds sensors; andwith said wheel brake cylinders operatively mounted thereon and disposed in different hydraulic pressure circuits, and placed at the left side and right side of said vehicle, respectively, when a difference between the slip of said wheels placed at the left side and right side of said vehicle exceeds a predetermined value when said two pump means introduce brake fluid from said master cylinder in said auxiliary pressure passages, respectively and supply the pressurized brake fluid to said wheel brake cylinders connected to the different hydraulic pressure circuits.