Apparatus for controlling brake pressure to wheels.

摘要

An apparatus for controlling brake pressures is disclosed which is capable of controlling a distribution of braking efforts in the absence of a brake pedal operation by a driver. The apparatus comprises a master cylinder (2) for generating a primary pressure and a booster (5) for generating a secondary pressure; a source of constant pressure (21, 22) for producing a tertiary pressure which is a substantially constant high pressure; first selection means (64, 65) for selecting one of the secondary and the tertiary pressure; second selection means (61 - 63) for selecting one of the pressure selected by the first selection means and the primary pressure; and first to fourth intensifying/reducing means (312, 334, 356, 378) for selectively supplying the pressure selected by the second selection means or a low pressure to individual wheel brakes (51 - 54). To provide a reasonable harmony between the antiskid control and the braking effort distribution control, a controller for the apparatus comprises reference value means (10) for providing a restricted condition for the initiation of a pressure regulation by the antiskid control whenever the braking effort distribution control is regulating the wheel brake pressures, means (10) for forcibly interrupting the antiskid control whenever the braking effort distribution control is terminated, and liquid pressure compensation means (10) for temporarily intensifying the pressures when the antiskid control is terminated during the execution of the braking effort distribution control. <IMAGE>