초록 ▼

A hydraulic brake control apparatus in which a master cylinder supplies a brake fluid pressure responsive to a brake operating force to wheel cylinders through a first valve, includes a first control unit which controls second valves and third valves when a brake fluid pressure supplied to the wheel

A hydraulic brake control apparatus in which a master cylinder supplies a brake fluid pressure responsive to a brake operating force to wheel cylinders through a first valve, includes a first control unit which controls second valves and third valves when a brake fluid pressure supplied to the wheel cylinders by a pressure supplying device is detected to be excessively high under a condition in which the supply of the brake fluid pressure to the wheel cylinders by the master cylinder is inhibited by the first valve, so that the supply of the brake fluid pressure to the wheel cylinders by the pressure supplying device is inhibited by the second valves and a flow of the brake fluid from the wheel cylinders into a reservoir tank is allowed by the third valves. A second control unit controls the third valves and the first valve at a predetermined time after the flow of the brake fluid from the wheel cylinders into the reservoir tank is allowed, so that the flow of the brake fluid from the wheel cylinders into the reservoir tank is inhibited by the third valves and the supply of the brake fluid pressure to the wheel cylinders by the master cylinder is allowed by the first valve.

대표청구항 ▼

[ What is claimed is:] [1.] A hydraulic brake control apparatus for preventing a counterflow of brake fluid into a master cylinder when a supply brake pressure is excessive, the master cylinder supplying to at least one wheel cylinder via at least one first valve a brake fluid pressure responsive to

[ What is claimed is:] [1.] A hydraulic brake control apparatus for preventing a counterflow of brake fluid into a master cylinder when a supply brake pressure is excessive, the master cylinder supplying to at least one wheel cylinder via at least one first valve a brake fluid pressure responsive to a brake operating force, a pressure supplying device supplies a brake fluid pressure responsive to a drive signal to the at least one wheel cylinder through at least one second valve, and the at least one wheel cylinder is connected to a reservoir tank via at least one third valve, the apparatus comprising:a control unit for controlling the at least one first, second and third valves, wherein, when the brake fluid pressure supplied by the pressure supplying device to the at least one wheel cylinder is excessively high and the supply of brake fluid pressure to the at least one wheel cylinder by the master cylinder is inhibited by the at least one first valve, the control unit controls the at least one second valve to inhibit the supply of the brake fluid pressure to the at least one wheel cylinder by the pressure supplying device and controls the at least one third valve to allow a flow of brake fluid from the at least one wheel cylinder into the reservoir tankand wherein, at a predetermined time after the at least one third valve is controlled to allow the flow of brake fluid from the at least one wheel cylinder into the reservoir tank, the control unit controls the at least one third valve to inhibit the flow of brake fluid from the at least one wheel cylinder into the reservoir tank and controls the at least one first valve to allow the supply of the brake fluid pressure to the at least one wheel cylinder by the master cylinder.