초록 ▼

In a braking pressure control apparatus for a vehicle, a first valve connected between a hydraulic pressure source and a wheel cylinder serves to permit and inhibit a supply of brake fluid to the wheel cylinder from the hydraulic pressure source. A second valve connected between the wheel cylinder a

In a braking pressure control apparatus for a vehicle, a first valve connected between a hydraulic pressure source and a wheel cylinder serves to permit and inhibit a supply of brake fluid to the wheel cylinder from the hydraulic pressure source. A second valve connected between the wheel cylinder and a reservoir serves to permit and inhibit an escape of the brake fluid from the wheel cylinder toward the reservoir. A control device serves to output control signals to the first and second valves respectively to control the braking pressure in the wheel cylinder in response to a detected running condition of the vehicle. The control device includes a deciding section for deciding whether or not a small variation in the braking pressure in the wheel cylinder should be done on the basis of the detected running condition of the vehicle, and an outputting section for, when the deciding section decides that the small variation in the braking pressure in the wheel cylinder should be done, simultaneously outputting the control signals to the first and second valves to simultaneously execute the supply of the brake fluid to the wheel cylinder and the escape of the brake fluid from the wheel cylinder.

대표청구항 ▼

In a vehicle brake control system including means for detecting a running condition of a vehicle, a wheel cylinder, and means for controlling a braking pressure in the wheel cylinder in response to the detected running condition of the vehicle, a braking pressure control apparatus comprising: a hydr

In a vehicle brake control system including means for detecting a running condition of a vehicle, a wheel cylinder, and means for controlling a braking pressure in the wheel cylinder in response to the detected running condition of the vehicle, a braking pressure control apparatus comprising: a hydraulic pressure source; a first electromagnetic valve, changeable between a closed state and an open state, connected between the hydraulic pressure source and the wheel cylinder for controlling a supply of brake fluid to the wheel cylinder from the hydraulic pressure source; a reservoir; a second electromagnetic valve, changeable between a closed state and an open state, connected between the wheel cylinder and the reservoir for controlling the escape of brake fluid from the wheel cylinder toward the reservoir; and control means for outputting control signals for independently controlling the first and second valves, respectively, so as to control the braking pressure in the wheel cylinder by controlling supply to and escape from the wheel cylinder of brake fluid, where the control means comprises deciding means for determining whether the wheel cylinder braking pressure should be varied on the basis of the running condition, and means for independently controlling the valves such that one valve is placed in an open state at a time when the other valve is already in an open state and remains in the open state until a target wheel cylinder pressure is attained, thereby providing fine adjustment of the braking pressure by the simultaneous supply of brake fluid to the wheel cylinder and escape of brake fluid from the wheel cylinder.