Vehicle brake hydraulic pressure control apparatus

A vehicle brake hydraulic pressure control apparatus including:

• an inlet valve interposed on a hydraulic line extending from a hydraulic pressure source to a wheel brake;
• an outlet valve interposed on a hydraulic line extending from the wheel brake to a reservoir;
• a pump interposed on a hydraulic line extending from the reservoir to the hydraulic pressure source;
• a motor configured to drive the pump;
• and
• a control unit configured to execute an antilock brake control, and to execute a control to return a brake fluid accumulated in the reservoir due to a pressure decreasing control in the antilock brake control to the hydraulic pressure source by driving the motor,
• wherein the control unit includes:
• a target delivery amount calculator configured to calculate a target delivery amount which corresponds to an amount of brake fluid discharged from the reservoir per a predetermined time;
• a temperature information fetcher configured to acquire a temperature of the brake fluid;
• and
• a drive signal determinator configured to determine a drive signal of the motor based on the target delivery amount and the temperature of the brake fluid, and
• wherein the control unit includes:
• a reservoir usage amount estimator configured to estimate a reservoir usage amount which corresponds to an increase amount from an initial state of the brake fluid in the reservoir;
• and
• a target discharge time setter configured to set a target discharge time corresponding to a driving time of the motor to return the brake fluid accumulated in the reservoir to the hydraulic pressure source based on a road surface friction coefficient, and
• wherein the target delivery amount calculator calculates the target delivery amount based on the reservoir usage amount and the target discharge time.