Patent ID: 6290310
Filing Date: 2001-09-18
Classification: B60T

Abstract:
A brake pressure control device for automotive vehicles comprising:a wheel brake operatively associated with a wheel of the automotive vehicle for applying a braking force to the wheel;a master cylinder linked with a brake pedal;a power pressure source separate from the master cylinder for generating a hydraulic pressure;a hydraulic pressure control valve disposed between the power pressure source and the wheel brake to adjust a hydraulic pressure of the wheel brake using the hydraulic pressure generated by the power pressure source;a first open/close valve which establishes and interrupts fluid communication between the master cylinder and the wheel brake;a stroke simulator connected to the master cylinder to permit a stroke of the brake pedal when the first open/close valve is closed;a second open/close valve which establishes and interrupts fluid communication between the master cylinder and the stroke simulator;first detecting means for detecting an operation force of the brake pedal or hydraulic pressure generated by the master cylinder;second detecting means for detecting the stroke of the brake pedal or a stroke of the master cylinder; andcontrol means for controlling the hydraulic pressure control valve in response to a detection output of the first detection means by closing and opening the first open/close valve and the second open/close valve, respectively, when the power pressure source is in a normal condition, the control means closing the second open/close valve when the stroke of the brake pedal or the stroke of the master cylinder exceeds a predetermined stroke.