To provide a vehicle brake hydraulic pressure control system capable of appropriately estimating a road surface from lateral acceleration.
The vehicle brake hydraulic pressure control system 100 is equipped with a side skid determination means 21, a hydraulic pressure control means 24 and a road surface determination means 22. The road surface determination means 22 has a lateral acceleration conversion means 22a for converting to a lateral acceleration evaluated value for representing the magnitude of the lateral acceleration, a change-rate calculation means 22b for calculating a time rate of a change of the lateral acceleration evaluated value, and a determination means 22c which determines that road surface where a vehicle travels is a high road when satisfying a first condition that the lateral acceleration evaluated value is not smaller than a first threshold, or when satisfying a second condition that the time rate of change of the lateral acceleration is not smaller than a predetermined value, and determines that the road surface is a low road when satisfying neither the first condition nor the second condition, when it is determined that the vehicle is in a side-skid state by the side skid determination means and the hydraulic pressure control means 24 starts side skid suppression control.
| JPS5679043 | ANTISKID CONTROLLING APPARATUS |
MINOWA KAZUNORI
TAKAHASHI MASAKI
| JPH11194087A | 1999-07-21 | |||
| JP2003261016A | 2003-09-16 | |||
| JPH08133057A | 1996-05-28 | |||
| JP2006027570A | 2006-02-02 |
Tatsuya Inagaki