Vehicle brake hydraulic controller

A vehicle brake hydraulic controller which is mounted in a four-wheel drive vehicle, comprising:

• a wheel speed acquiring section configured to acquire a wheel speed from a wheel speed sensor;
• a wheel deceleration calculator configured to calculate a wheel deceleration based on the wheel speed;
• a vehicle velocity calculator configured to calculate a vehicle deceleration based on a temporary vehicle deceleration which is calculated by using an acceleration sensor value which is outputted from a longitudinal acceleration sensor which detects a longitudinal acceleration to thereby calculate a vehicle velocity based on the vehicle deceleration;
• and
• a locking tendency determination section configured to determine from the vehicle velocity and the wheel speed whether or not there exists a locking tendency in a wheel,
• wherein the vehicle velocity calculator calculates the temporary vehicle deceleration by offsetting a first correction amount to a deceleration side in relation to the acceleration sensor value, and
• wherein, when conditions that a brake pedal operation amount by a driver is equal to or smaller than a first threshold and that an absolute value of the wheel deceleration is equal to or larger than an absolute value of a second threshold are met, the first correction amount is set to be smaller than when the conditions are not met.