| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent a driver from feeling sense of incongruity upon a brake operation by performing such a control that wheel cylinder hydraulic pressure may not rapidly drop when switching from feedback control to feed forward control. <P>SOLUTION: A motor rotation speed estimation part 132 estimates motor rotation speed which increases gradually depending on a target rotation speed for FF control higher by an excess rotation speed than a target rotation speed for FB control when switching from FB control to FF control, and a flow rate calculation part 133 estimates a flow rate passing through a hydraulic pressure control valve which increases gradually depending on a lifting flow rate by a hydraulic pump corresponding to the estimated motor rotation speed. A control current correction calculation part 134 calculates and controls the control current to be applied to the hydraulic pressure control valve so that wheel cylinder hydraulic pressure may not change even when an electric motor is rotated at a FF control target rotation speed and brake fluid passing through the hydraulic pressure control valve increases gradually. <P>COPYRIGHT: (C)2013,JPO&INPIT |
