JPS5825266U - 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. 2: Mask cylinder, 12: Hydraulic pressure control valve, 14゜24:
Rear wheel cylinder, 28: Opening/closing valve part (opening/closing valve), 4
0: first hydraulic chamber, 60: through hole, 62: annular piston,
64; Large diameter part, 66: Small diameter part, 76: Second hydraulic chamber, 78
: first pressure receiving surface, 80: second pressure receiving surface, 82: third pressure receiving surface,
84: Stopper, 100: Passage. A: Interval.

Claims (1)

[Claims for Utility Model Registration] Braking fluid pressure is reduced by a hydraulic pressure control valve installed in one piping system and supplied to one rear wheel cylinder, and the other rear wheel cylinder is connected to the other piping system. A balance piston that operates based on the pressure difference between the brake fluid pressure and the brake fluid pressure supplied to the other wheel cylinder opens and closes an on-off valve provided in the other piping system, thereby providing braking to the other wheel cylinder. In a hydraulic pressure control device in a two-system control system for a vehicle that controls hydraulic pressure to be equal to the braking hydraulic pressure supplied to the one rear wheel cylinder, the hydraulic pressure is supplied to the other rear wheel cylinder. a large diameter portion facing one end of the balance piston with an interval larger than the movement amount required for a control operation of the balance piston that controls dynamic hydraulic pressure; and a large diameter portion opposite to 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 a smaller area than the first pressure receiving surface; and a through hole, into which the small diameter portion of the stepped piston is slidably fitted. and a third pressure receiving surface that comes into contact with a stepped portion formed between the small diameter portion and the large diameter portion, and forms a pressure receiving surface that is smaller than the first pressure receiving surface together with the second pressure receiving surface of the small diameter portion. a stopper that prevents the annular piston from moving toward the balance piston; and a stopper that prevents the annular piston from moving toward the balance piston; and a brake of the rear wheel cylinder that is connected to the one rear wheel cylinder and whose pressure is reduced by the hydraulic pressure control valve. a first hydraulic pressure chamber that applies hydraulic pressure to the first pressure receiving surface; and a mask cylinder that supplies braking hydraulic pressure to the other rear wheel cylinder; the brake hydraulic pressure of the master cylinder is applied to the second pressure receiving surface; and a second pressure-receiving surface that acts on the third pressure-receiving surface.
The hydraulic pressure chamber communicates with a mask cylinder that supplies braking hydraulic pressure to one of the rear wheel cylinders, and opens toward the outer peripheral surface of the large diameter portion of the stepped piston, so that the stepped piston is connected to the annular piston. and a passage that communicates with the first hydraulic pressure chamber to transmit the braking hydraulic pressure of the mask cylinder to the first hydraulic pressure chamber when the mask cylinder is moved toward the small diameter portion thereof. Hydraulic pressure control device for two-system control system for vehicles.