Patent ID: 6688705
Filing Date: 2004-02-10
Classification: B60T

Abstract:
A hydraulic pressure control apparatus for use with a manually operable operating member, said hydraulic pressure control device comprising:a hydraulic pressure source device including a pressure control actuator operable according to a control amount, said hydraulic pressure source device being operable to generate an output pressure thereof on the basis of a fluid pressure corresponding to an operating force of said manually operable operating member, and on the basis of a control pressure controlled by said pressure control actuator; and an actuator control device including a final-control-value determining portion operable to determine a final value of said control amount, said actuator control device controlling said pressure control actuator according to said final value determined by said final-control-value determining portion, wherein said final-control-value determining portion determines said final value of said control amount on the basis of at least two provisional control values selected from the group consisting of (a) at least one first provisional control value each of which is determined on the basis of at least one physical quantity including one of (i) an operating-state value representative of an operating state of said manually operable operating member and (ii) said output pressure of said hydraulic pressure source device, and (b) at least one second provisional control value each of which is determined on the basis of a combination of physical quantities which includes at least two of said operating-state value, said output pressure and said control pressure controlled by said pressure control actuator, and wherein said hydraulic pressure source device is mechanically constructed such that a change of any one of said output pressure, said fluid pressure and said control pressure while another of said output pressure, said fluid pressure and said control pressure is held constant causes a change of a remaining one of said output pressure, said fluid pressure and said control pressure.