초록 ▼

The invention is directed to an arrangement for controlling a braking force applied to a rear wheel in a certain relationship with a braking force applied to a front wheel, so as to provide an ideal braking force distribution. Pressure control valves are disposed in a hydraulic circuit which communi

The invention is directed to an arrangement for controlling a braking force applied to a rear wheel in a certain relationship with a braking force applied to a front wheel, so as to provide an ideal braking force distribution. Pressure control valves are disposed in a hydraulic circuit which communicates a master cylinder with at least a rear wheel cylinder. There are provided an auxiliary power source for discharging a power pressure and a hydraulic booster for regulating the power pressure and actuating the master cylinder. A changeover valve is disposed between the master cylinder and the control valves, and selectively placed in one of a first operating position for communicating the control valves with the master cylinder and blocking the communication between the control valves and the hydraulic booster, and a second operating position for communicating the control valves with the hydraulic booster and blocking the communication between the control valves and the master cylinder. When the changeover valve is placed from the first operating position to the second operating position, the control valves control the hydraulic pressure in the rear wheel cylinder in a certain relationship with the hydraulic pressure in the front wheel cylinder.

대표청구항 ▼

A braking force distribution control system for controlling a braking force applied to a rear wheel of an automotive vehicle in a certain relationship with a braking force applied to a front wheel of said automotive vehicle, comprising: a front wheel brake cylinder operatively connected to said fron

A braking force distribution control system for controlling a braking force applied to a rear wheel of an automotive vehicle in a certain relationship with a braking force applied to a front wheel of said automotive vehicle, comprising: a front wheel brake cylinder operatively connected to said front wheel for applying the braking force thereto; a rear wheel brake cylinder operatively connected to said rear wheel for applying the braking force thereto; a reservoir for storing a brake fluid therein; a master cylinder for pressurizing the brake fluid fed from said reservoir and supplying a hydraulic braking pressure to each of said front and rear wheel brake cylinders in response to depression of a brake pedal; pressure control valve means disposed in a hydraulic circuit communicating said master cylinder with at least said rear wheel brake cylinder for controlling the hydraulic braking pressure in said rear wheel brake cylinder; an auxiliary power source communicated with said reservoir for pressurizing the brake fluid fed from said reservoir and discharging a power pressure; dynamic hydraulic braking pressure regulating means communicated with said auxiliary power source for regulating said power pressure to a pressure regulated in a certain relationship with the hydraulic braking pressure discharged from said master cylinder in response to depression of said brake pedal; a changeover valve disposed between said master cylinder and said valve means and selectively placed in one of a first operating position for communicating said valve means with said master cylinder and blocking the communication between said valve means and said regulating means, and a second operating position for communicating said valve means with said regulating means and blocking the communication between said valve means and said master cylinder; and control means for placing said changeover valve from said first operating position to said second operating position, and actuating said valve means to control the hydraulic braking pressure in said rear wheel brake cylinder in a certain relationship with the hydraulic braking pressure in said front wheel brake cylinder.