| 摘要 |
Disclosed are a vehicle hydraulic control device and a vehicle hydraulic control method. According to an embodiment of the present invention, the vehicle hydraulic control method is capable of performing a hydraulic brake boost (HBB) control to brake a wheel by supplying an assist pressure to a wheel cylinder after generating the assist pressure by the operation of a hydraulic pump operated by a hydraulic motor, wherein the assist pressure corresponds to a difference between a master cylinder pressure and a target wheel cylinder pressure corresponding to the stroke signal of a brake pedal. The vehicle hydraulic control method comprises as follows: a control part detects a vacuum pressure in a booster boosting the pedal effort the brake pedal in the case of braking a vehicle, and performs the HBB control if the detected vacuum pressure is lower than a predetermined pressure; and the control part determines whether an ABS control is required or not during the HBB control, and stops the HBB control temporarily and performs the ABS control when the ABS control is required. When performing the ABS control, the control part determines a road surface condition for the driven vehicle, determines a motor speed corresponding to the determined road surface condition, and operates the hydraulic pump by driving the hydraulic motor based on the determined motor speed. According to the present invention, when the ABS control is started during the HBB control, the speed of the hydraulic motor can be varied into an optimal motor speed suitable for a road surface. |
