Patent ID: 8235471
Filing Date: 2012-08-07
Classification: B60T

Abstract:
1. An apparatus for controlling a pump driving motor, the apparatus being used in an antiskid control apparatus performing a combination of a pressure-reducing control and a pressure-intensifying control multiple times, the pressure-reducing control in which a wheel cylinder pressure of a wheel decreases when the wheel is brought to a locked state during a braking of a vehicle, the pressure-intensifying control in which the wheel cylinder pressure increases when the locked state of the wheel is released by the pressure-reducing control, the apparatus for controlling a pump driving motor, comprising: estimated fluid volume obtaining means for obtaining a reservoir fluid estimated value that is an estimated volume of a brake fluid discharged to a reservoir during the pressure-reducing control performed at a predetermined time; hydraulic pump controlling means for specifying the number of rotations of the motor for driving a hydraulic pump that sucks the brake fluid from the reservoir based on the estimated volume and for driving the hydraulic pump with the specified number of rotations of the motor; actual time measuring means for measuring an actual time defined from a driving start of the hydraulic pump to a point where the brake fluid in the reservoir actually turns to zero; estimated time obtaining means for obtaining an estimated time during which the estimated volume of the brake fluid turns to zero; determining means for determining whether or not the actual time measured by the actual time measuring means is shorter than the estimated time obtained by the estimated time obtaining means based on a comparison between the actual time and the estimated time; and changing means for changing the number of rotations of the motor applied when the brake fluid in the reservoir is discharged to be smaller than the number of rotations of the motor specified on the basis of the estimated volume at a time of the pressure-reducing control that follows the pressure-intensifying control performed at the predetermined time in a case where the determining means determine that the actual time is shorter than the estimated time.