Patent ID: 6123397
Filing Date: 2000-09-26
Classification: B60T

Abstract:
A brake fluid pressure control device comprising:a first-system hydraulic circuit linked to a first-system wheel cylinder;a second-system hydraulic circuit linked to a second-system wheel cylinder;a first pressure sensor outputting a first value corresponding to a pressure in the first-system wheel cylinder;a second pressure sensor outputting a second value corresponding to a pressure in the second-system wheel cylinder;a connection path between the first-system wheel cylinder and the second-system wheel cylinder, the configuration of the connection path determining a status of fluid communication between the first-system wheel cylinder and the second-system wheel cylinder;a hydraulic pressure source;a hydraulic pressure source sensor outputting a source value corresponding to a brake fluid pressure generated by the hydraulic pressure source; anda sensor operation status determination unit which, when the hydraulic pressure source is generating brake fluid pressure, compares the first and source values while the brake fluid pressure is not supplied between the first-system wheel cylinder and the second-system wheel cylinder via the connection path, compares the first and second values while the brake fluid pressure is supplied from the first-system wheel cylinder to the second-system wheel cylinder via the connection path and determines an operational status of the hydraulic pressure source sensor, the first pressure sensor and the second pressure sensor based on the comparison of the source, first and second values.