BRAKE HYDRAULIC PRESSURE CONTROL DEVICE FOR VEHICLE

摘要

A brake hydraulic pressure control device for a vehicle in which operation of a hydraulic pressure adjustment unit that can carry out adjustment involving individually increasing/decreasing brake hydraulic pressures applied to wheel brakes for front and rear wheels is controlled for allowing differential pressure between brake hydraulic pressures of the left and right wheel brakes, wherein allowable differential pressure setting means is arranged for setting the allowable differential pressure corresponding to the coefficient of friction of a road surface, hydraulic pressure acquisition means acquires a lock hydraulic pressure, which is a hydraulic pressure when starting anti-lock brake control for the respective wheel brake, and when the lock hydraulic pressure of the wheel brakes for the front wheels acquired by the hydraulic pressure acquisition means is no greater than a predetermined value, application of the allowable differential pressure corresponding to the coefficient of friction of the road surface is prohibited.

主权项

1. A brake hydraulic pressure control device for a vehicle, the control device comprising a hydraulic pressure adjustment unit that can carry out adjustment involving individually increasing/decreasing brake hydraulic pressures applied to wheel brakes for front wheels and wheel brakes for rear wheels in order to prevent the front wheels and the rear wheels from attaining a locked state when braking, and allowable differential pressure setting means that sets an allowable differential pressure between the brake hydraulic pressures of the wheel brakes for the left and right front wheels and an allowable differential pressure between the brake hydraulic pressures of the wheel brakes for the left and right rear wheels, operation of the hydraulic pressure adjustment unit being controlled so that the differential pressure between brake hydraulic pressures of the left and right wheel brakes is no greater than an allowable differential pressure that is set by the allowable differential pressure setting means, characterized in that the control device comprises hydraulic pressure acquisition means that acquires a lock hydraulic pressure, which is a hydraulic pressure when starting anti-lock brake control for the respective wheel brake, the allowable differential pressure setting means being arranged so that the allowable differential pressure can be set so as to correspond to a coefficient of friction of a road surface, and when the lock hydraulic pressure of the wheel brakes for the front wheels acquired by the hydraulic pressure acquisition means is no greater than a predetermined value which can be determined as to be a low coefficient of friction, application of the allowable differential pressure corresponding to the coefficient of friction of the road surface is prohibited.