| 摘要 |
PROBLEM TO BE SOLVED: To properly estimate a differential pressure between a master cylinder pressure and a wheel cylinder pressure in ABS control of a highμ-side front wheel in an braking operation during traveling on a split road. SOLUTION: This device adopts a normally-opened linear electromagnetic valve as a boost valve, and repeats ABS control with a set of decompressive control/linear boost control. ABS control is executed to a first front wheel 1o by a brake operation on a "split road", and yaw-moment control is executed to a second front wheel hi. Under this condition, when brake fluid pressure control of the second front wheel hi is shifted to ABS control, this device calculates/updates a differential pressure estimated value Pdiffhi of the second front wheel hi used for deciding a command current value of the normally-open linear electromagnetic valve corresponding to the second front wheel hi using a relationship, "differential pressure of the second front wheel = differential pressure of the first front wheel - (wheel cylinder pressure of the second front wheel - wheel cylinder pressure of the first front wheel)". COPYRIGHT: (C)2008,JPO&INPIT
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