Patent ID: 6709072
Filing Date: 2004-03-23
Classification: B60T,Y10S

Abstract:
A vehicle hydraulic brake system comprising a hydraulic pressure source for generating a predetermined hydraulic pressure, a pressure adjusting valve for adjusting the hydraulic pressure supplied from said hydraulic pressure source to a value corresponding to a brake operation and/or an automatic brake control, a master cylinder for generating hydraulic pressure according to brake operation and/or automatic brake control, wheel cylinders activated by the output pressure from said master cylinder to apply braking force to wheels of the vehicle, wheel cylinder pressure control valves provided in a hydraulic line connecting said master cylinder to said wheel cylinders for adjusting the hydraulic pressure in said wheel cylinders,characterized in that there are provided means for estimating the amount of pressure increase and/or pressure reduction adjusted by said wheel cylinder pressure control valves, and a hydraulic pressure supply unit for supplying hydraulic pressure output of said pressure adjusting valve into a hydraulic line connecting said master cylinder to said wheel cylinder pressure control valve according to the estimated amount of pressure increase and/or pressure reduction.