| 摘要 |
PURPOSE:To improve braking stability ever so better, by calculating a split point starting the decompression control of rear fluid pressure commensurate to a load on a car at a time when reaching to the setting deceleration at braking, while finding the desired sealing fluid pressure according to the split point. CONSTITUTION:Each rear brakes 5 and 6 is controlled by the braking fluid pressure produced in a master cylinder 3 by operation of a brake pedal 1 via a hydraulic control actuator 4. In this case, first whether car deceleration reaches the setting value or not is judged from each output of wheel speed sensors 10 and 11 at a control unit 1. And, when a judgment of YES is the case, a split point to start the decompression control of rear fluid pressure from an ideal braking force curve is calculated on the basis of car weight to be found out of master fluid pressure Pm by a first hydraulic sensor 8. Next, on the basis of the split point, desired sealing fluid pressure Pgo is found, then this value is compared with that of actual sealing side fluid pressure Pg by a second hydraulic sensor 12, and according to the deviation, the actuator 4 is thus controlled. |
