초록 ▼

Disclosed is a hydraulic pressure control system for a motor vehicle which may be employed for anti-skid control. The control system comprises a wheel braking device for providing the brake for a wheel of the vehicle under hydraulic pressure, a braking pressure switching device for performing the sw

Disclosed is a hydraulic pressure control system for a motor vehicle which may be employed for anti-skid control. The control system comprises a wheel braking device for providing the brake for a wheel of the vehicle under hydraulic pressure, a braking pressure switching device for performing the switching operation at least between the increasing and decreasing of the hydraulic pressure applied to the wheel braking device, and a hydraulic pressure control unit for supplying a control signal to the braking pressure switching device at a predetermined interval so that the hydraulic pressure value to be applied to the wheel braking device becomes equal to a target hydraulic pressure value. The control unit compares the target hydraulic pressure value with first and second reference values which are obtained on the basis of an estimated hydraulic pressure value estimated to apply the wheel braking device and producing the control signal in accordance with the results of the comparison.

대표청구항 ▼

A method for controlling hydraulic pressure for a motor vehicle brake which includes wheel braking means for braking a wheel of the vehicle responsive to an applied hydraulic pressure, and braking pressure switching means for switching between an increasing and a decreasing of the hydraulic pressure

A method for controlling hydraulic pressure for a motor vehicle brake which includes wheel braking means for braking a wheel of the vehicle responsive to an applied hydraulic pressure, and braking pressure switching means for switching between an increasing and a decreasing of the hydraulic pressure applied to the wheel braking means, comprising the steps of: a. setting a target hydraulic pressure Py in accordance with system conditions; b. estimating an estimated hydraulic pressure actually applied to a wheel of the vehicle; c. determining a first reference value indicative of a maximum hydraulic pressure applied to said wheel using said hydraulic pressure Px and a second reference value indicative of a minimum hydraulic pressure applied to said wheel using said hydraulic pressure Px; d. comparing said target hydraulic pressure with said first and second reference values; e. setting a duty cycle of said braking pressure switching means based on said comparison; f. allowing a predetermined time interval to elapse; and g. repeating said steps (c)-(f) after every said predetermined interval of time elapses.