Vehicle brake hydraulic pressure control apparatus

A brake hydraulic pressure control apparatus that is applied to a control unit provided with

• a first linear solenoid valve disposed in a hydraulic circuit between a master cylinder, the master cylinder generating a master cylinder hydraulic pressure according to a brake operation by a driver, and a wheel cylinder, the first linear solenoid valve being configured to adjust a differential pressure between the master cylinder hydraulic pressure and a wheel cylinder hydraulic pressure according to a first energizing current value;
• and
• a second valve disposed in a hydraulic circuit between the wheel cylinder and a reservoir, the second valve being configured to be opened and closed in response to a second energizing current value, the brake hydraulic pressure control apparatus comprising:
• control means for continuously executing plural times an anti-skid control, the anti-skid control comprising a pressure-increasing control for increasing the wheel cylinder hydraulic pressure which is executed after a pressure-reducing control for reducing the wheel cylinder hydraulic pressure is executed, by controlling the first and second energizing current values;
• first obtaining means for causing, during the pressure-increasing control of a predetermined execution of the anti-skid control, the control means to continuously execute plural times a pulse pressure-increasing control for increasing and holding the wheel cylinder hydraulic pressure by controlling the first and second energizing current values, wherein during each pulse pressure-increasing control the first valve is maintained in its open state for a predetermined pressure-increasing time and then is maintained in its closed state for a predetermined pressure-holding time while the second valve is maintained in its closed state, the first obtaining means further obtaining the number of times the pulse pressure-increasing control is executed during the pressure-increasing control of the predetermined execution of the anti-skid control;
• and
• second obtaining means for obtaining a first value which is the first energizing current value corresponding to the differential pressure at a start of the execution of the pressure-increasing control of the anti-skid control that is executed immediately after the predetermined execution of the anti-skid control, the second obtaining means obtaining the first value based upon the number of times of the pulse pressure-increasing control is executed,
• wherein the control means sets the first energizing current value to the first value at the start of the pressure-increasing control of the anti-skid control that is executed immediately after the predetermined execution.