JPS5823764U - Hydraulic pressure control device in two-system control system for vehicles - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the configuration of a two-system control device including an embodiment of the present invention. FIG. 2 is a sectional view showing a main part of the embodiment shown in FIG. 1. FIG. 3 is a diagram corresponding to FIG. 2 showing another embodiment of the present invention. 2: Mask cylinder, 12: Hydraulic pressure control valve, 14. .

Claims (1)

[Scope of Claim for Utility Model Registration] □ Braking fluid pressure reduced by a hydraulic pressure control valve installed in one piping system and supplied to one rear wheel cylinder, and the other rear wheel connected to the other piping system. The balance piston, which operates based on the pressure difference between the brake fluid pressure supplied to the cylinder, opens and closes the on-off valve provided in the other piping system, thereby supplying the brake fluid to the other rear wheel cylinder. In a hydraulic pressure control device in a two-system control system for a vehicle that controls the brake fluid pressure to be equal to the brake fluid pressure supplied to the other rear wheel cylinder, the brake fluid pressure supplied to the other rear wheel cylinder is a large diameter portion facing one end of the balance piston at an interval greater than the amount of movement required for the control operation of the balance piston to be controlled; and a first pressure receiving surface on the opposite side of the first pressure receiving surface on the side of the large diameter portion. a stepped piston having a small diameter portion having a second pressure receiving surface having an area smaller than that of the stepped piston; and a through hole, into which the small diameter portion of the stepped piston is slidably fitted; and the large diameter portion, and includes a third pressure receiving surface that is larger than the first pressure receiving surface together with the second pressure receiving surface of the small diameter portion 9. a piston; a stopper that prevents the annular piston from moving toward the balance piston; a first hydraulic pressure chamber that acts on the first pressure receiving surface; and a mask cylinder that supplies braking hydraulic pressure to the other rear wheel cylinder, and is connected to a mask cylinder that supplies braking hydraulic pressure of the master cylinder to the second pressure receiving surface and the third a second hydraulic pressure chamber that acts on the pressure-receiving surface; and a second hydraulic pressure chamber that is inserted in a passage leading from a mask cylinder that supplies braking hydraulic pressure to one of the rear wheel cylinders to the first hydraulic pressure chamber, and that is directed away from the stepped piston. a bypass valve having a valve body and a bypass valve formed on the outer peripheral surface of the stepped piston, and when the stepped piston is moved together with the annular piston to the small diameter side thereof; , a cam surface that engages with a transmission member provided between the valve body and the stepped piston to move the valve body in a direction away from the stepped piston via the transmission member; A hydraulic pressure control device in a two-system control control device for a vehicle, characterized in that it is provided with: