초록 ▼

In a brake fluid control device, front wheel cylinders are connected to a front hydraulic circuit, and rear wheel cylinders are connected to a rear hydraulic circuit. The front hydraulic circuit and the rear hydraulic circuit are connected to a front left pressure-decrease valve, a front right press

In a brake fluid control device, front wheel cylinders are connected to a front hydraulic circuit, and rear wheel cylinders are connected to a rear hydraulic circuit. The front hydraulic circuit and the rear hydraulic circuit are connected to a front left pressure-decrease valve, a front right pressure-decrease valve, a rear left pressure-decrease valve, a rear right pressure-decrease valve and a connecting pipe. When a brake pedal is depressed, the front left pressure-decrease valve, the front right pressure-decrease valve, the rear left pressure-decrease valve and the rear right pressure-decrease valve are opened and a master cylinder pressure sensor leads to both the front hydraulic circuit and the rear hydraulic circuit. Comparing a detection value of the of the master cylinder pressure sensor, a detection value of a front wheel cylinder pressure sensor and a detection value of a rear wheel cylinder pressure sensor respectively, detects the state of operation of each of the sensors provided in the system.

대표청구항 ▼

[ What is claimed is:] [1.] 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 pressur

[ What is claimed is:] [1.] 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.