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A brake control system for a motor vehicle which is equipped with a running state detector for detecting a running state of the motor vehicle so as to adjust a braking pressure in a wheel-braking cylinder of the motor vehicle in accordance with the detected vehicle running state. The brake control s

A brake control system for a motor vehicle which is equipped with a running state detector for detecting a running state of the motor vehicle so as to adjust a braking pressure in a wheel-braking cylinder of the motor vehicle in accordance with the detected vehicle running state. The brake control system has a first restriction adjusting valve provided between a hydraulic pressure generating source and the wheel-braking cylinder for adjusting the braking pressure to be supplied from the hydraulic pressure generating source to the wheel-braking cylinder, and a second restriction adjusting valve provided between the wheel-braking cylinder and a reservoir for adjusting a braking liquid to be discharged from the wheel-braking cylinder to the reservoir. Also included in the system is a control unit for outputting control signals to the first and second restriction adjusting valves so as to control the braking pressure in the wheel-braking cylinder in accordance with the detected vehicle running state. This arrangement allows setting of the braking hydraulic pressure increasing and decreasing speeds so as to permit a smooth brake control operation.

대표청구항 ▼

A brake control system for a motor vehicle which is equipped with a running state detecting means for detecting a running state of said motor vehicle to adjust a braking pressure in a wheel-braking cylinder of said motor vehicle in accordance with said detected vehicle running state, said brake cont

A brake control system for a motor vehicle which is equipped with a running state detecting means for detecting a running state of said motor vehicle to adjust a braking pressure in a wheel-braking cylinder of said motor vehicle in accordance with said detected vehicle running state, said brake control system comprising: a restriction adjusting valve provided between a hydraulic pressure generating source and said wheel-braking cylinder for receiving a braking liquid from said hydraulic pressure generating source and for adjusting an outflow of said received braking liquid to said wheel-braking cylinder, said restriction adjusting valve having a first communication hole through which said received braking liquid flows, an oil chamber, a sliding member slidably received in said oil chamber for variably changing an area of said first communication hole from a maximum to a minimum, position changing means for changing a position of said sliding member in accordance with first control signals, and pressure compensation means, cooperating with said oil chamber and formed in a housing of said restriction adjusting valve, for cancelling a pressure applied to said sliding member by said received braking liquid; pressure control valve provided between said wheel-braking cylinder and a reservoir for allowing outflow of braking liquid from said wheel-braking cylinder to said reservoir to adjust a braking pressure in said wheel-braking cylinder; and control means for adjusting braking pressure in said wheel-braking cylinder by outputting said first control signals to said position changing means of said restriction adjusting valve to change said first communication hole area and outputting second control signals to said pressure control valve based on said detected vehicle running state.