Brake device

摘要

It is an object of the invention to provide a brake device capable of detecting a failure in each of components, by which booster control is performed, at an early stage even during vehicle running. The brake device is configured to discharge brake fluid into a communicating fluid path that connects a fluid path of a primary system and a fluid path of a secondary system, and to control a first communicating valve for restricting a flow of brake fluid from the communicating fluid path to the fluid path of the primary system and a second communicating valve for restricting a flow of brake fluid from the communicating fluid path to the fluid path of the secondary system in respective valve-closing directions, so as to check at least a state of the pump.

主权项

1. A brake device comprising:
a fluid path of a primary system equipped with a plurality of wheel cylinders, which are pressurized by a master cylinder pressure produced by a first chamber of a master cylinder that produces a brake fluid pressure by a pedal operation by a driver; a fluid path of a secondary system equipped with a plurality of wheel cylinders, which are pressurized by a master cylinder pressure produced by a second chamber of the master cylinder; a communicating fluid path configured to connect the fluid path of the primary system and the fluid path of the secondary system; a pump configured to discharge brake fluid into the communicating fluid path; a first communicating valve disposed in the communicating fluid path for restricting a flow of the brake fluid from the communicating fluid path to the fluid path of the primary system; a second communicating valve disposed in the communicating fluid path for restricting a flow of the brake fluid from the communicating fluid path to the fluid path of the secondary system; a reflux fluid path provided between at least one communicating valve of the first communicating valve and the second communicating valve and the pump for returning the brake fluid discharged into the communicating fluid path back to a suction side of the pump; and a controller having a pump-state check part for checking at least a state of the pump by driving the pump and by controlling the first communicating valve and the second communicating valve in respective valve-closing directions, wherein
the controller has a one-sided system fluid pressure control part configured to control one communicating valve of the first communicating valve and the second communicating valve in a valve-opening direction, and to control the other communicating valve in a valve-closing direction, and to drive the pump, so as to deliver the brake fluid into the fluid path of the system whose communicating valve has been controlled in the valve-opening direction.