JPS6430864A - Control device for brake fluid pressure - Google Patents

Abstract

PURPOSE:To enable the determination of an always proper pressurereduction starting pressure by connecting a wheel speed sensor to a pressure-reduction starting pressure determination judging device while, at the same time, enable the judging device to receive a reset signal during the stoppage of a vehicle without applying brakes. CONSTITUTION:At the start of traveling, the number of pulses corresponding to a movable load is fed into a pulse motor 10 based on the magnitude of a load detecting signal. Here, in order to confirm an empty load at the start of a vehicle or at the time of checking or adjustment, or to enable initial setting by artificially resetting as a no load condition, a reset switch 60 is provided to control a controller 11. And, after setting a spring load in accordance with a loading condition, as a brake pedal 3 is stepped, a pressure fluid is directly fed from a master cylinder 1 to wheel cylinders of front wheels 5a, 5b and, then, transmitted to the wheel cylinders of rear wheels 9a, 9b. And, braking start to be applied to whole wheels, while a plunger 40 starts to move rightward according to the height of fluid pressure corresponding to the compression load of the load spring 50 of a load setting part 32, serving as a pressure- reduction proportionate control starting pressure.