JPS613059U - Anti-skid type hydraulic brake device for automobiles - Google Patents

Abstract

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

Description

[Brief explanation of drawings]

FIG. 1 is a circuit diagram showing a hydraulic brake device that is an embodiment of the present invention, and FIGS. 2 and 3 are front sectional views schematically showing the reservoir and switching valve in FIG. 1, respectively. . 40: Mask cylinder, 44: Brake pedal (brake operating member), {50, 52: Rear wheel cylinder,
58,'60: Front wheel cylinder} (brake cylinder), 62: Switching valve, 64: Solenoid control valve, {66
: Mask cylinder side passage, 68: Intermediate passage, 70: Wheel cylinder side passage} Main liquid passage, 78: Reservoir, 80
: housing, 82: piston, 84: liquid chamber, 86: spring (biasing means), 88: pump, 95: check valve,
96: Discharge passage, 99: Controller.

Claims (1)

[Scope of claim for utility model registration] A mask cylinder that generates brake fluid pressure in response to the operation of a brake operating member, a brake cylinder that operates a brake that suppresses rotation of a wheel, and a brake that controls the brake fluid pressure generated in the mask cylinder. A main fluid passage leading to the cylinder, and a pressure increase permissible state in which the brake cylinder is communicated with the mask cylinder to allow an increase in brake cylinder fluid pressure, and a pressure increase permissible state in which the brake cylinder fluid pressure is allowed to increase by communicating with the brake cylinder and a brake cylinder in which the brake cylinder is braked by communicating with the reservoir. an electromagnetic control valve that can be switched to a pressure drop permissible state that allows a decrease in cylinder hydraulic pressure; a controller that controls the electromagnetic control valve so that the slip rate of the wheel falls within an appropriate range; and a brake fluid sourced from the reservoir. An anti-skid type hydraulic brake device for an automobile including a pump that pumps up and supplies a portion of the main fluid passage between the Mazta cylinder and the electromagnetic control valve, wherein the reservoir has a variable volume and is increased in volume by a biasing means. The brake fluid chamber is biased so that the brake fluid discharged from the brake cylinder is stored in the fluid chamber, and the barrier chamber is used to prevent the brake fluid from flowing out from the fluid chamber. A hydraulic brake device, characterized in that the hydraulic brake device is connected to the main fluid passage through a check valve that allows the fluid to flow in but blocks the inflow.