| 摘要 |
PURPOSE:To make an all-wheel braking force distributive characteristic compensatable in a proper manner according to rear wheel load, by comparing a desired braking hydraulic pressure signal corresponding to wheel load with an outlet hydraulic pressure signal, while driving a control valve so as to accord both signals with each other. CONSTITUTION:In the case where each wheel load in front and rear wheels is equal in time of being loaded on a car, a function generating device 18 outputs a desired braking hydraulic pressure signal (d) with ech of signals (b) and (c) of front- and rear-wheel load detecting devices 16 and 17 so as to become ideal braking force distribution. A comparator 21 compares the signal (d) with an inlet hydraulic pressure signal (e) or an outlet hydraulic pressure signal (f), and when the signal (e) or (f) is accorded with the signal (d), it closes a valve 15. Then, inlet hydraulic pressure Pm is sealed in a hydraulic pressure sealed-off chamber 13, and operation of a P valve is controlled by the hydraulic pressure Pm. In addition, even in the case where the wheel load differs between front and rear wheels, the function generating device 18 outputs the desired braking hydraulic pressure signal (d) so as to become the ideal braking force distribution according to the wheel load of these front and rear wheels. The comparator 21 controls drive of the valve 15 likewise on the basis of this signal (d). |
