Patent ID: 6422660
Filing Date: 2002-07-23
Classification: B60T

Abstract:
A brake control system for a vehicle comprising:wheel brake cylinders operatively mounted on wheels of said vehicle, respectively; a master cylinder for advancing a master piston at least in response to operation of a brake pedal to supply brake fluid to said wheel brake cylinders; reservoir means communicated with said wheel brake cylinders for storing the brake fluid drained therefrom; normally open solenoid valves disposed between said master cylinder and said wheel brake cylinders, respectively; normally closed solenoid valves disposed between said wheel brake cylinders and said reservoir means, respectively; pump means for introducing the brake fluid stored in said reservoir means and supplying the brake fluid to a passage for connecting said master cylinder with said normally open solenoid valves; automatically pressurizing means for advancing said master piston irrespective of operation of said pump means and said brake pedal to generate hydraulic braking pressure from said master cylinder; and control means for actuating said normally open solenoid valves, said normally closed solenoid valves, said pump means and said automatically pressurizing means to control the hydraulic braking pressure in said wheel brake cylinders, said control means controlling a distance of said master piston advanced by said automatically pressurizing means when all of said normally open solenoid valves are closed during the hydraulic pressure control of said wheel brake cylinders, to be greater than the distance of said master piston advanced by said automatically pressurizing means when at least one of said normally open solenoid valves is open during the hydraulic pressure control of said wheel brake cylinders.