JPS5932554U

JPS5932554U - X-piped hydraulic brake system for vehicles

Info

Publication number: JPS5932554U
Application number: JP13052482U
Authority: JP
Inventors: 裕川口; 西名　秀芳; 順一田上
Original assignee: トヨタ自動車株式会社
Priority date: 1982-08-27
Filing date: 1982-08-27
Publication date: 1984-02-29
Also published as: JPH0234134Y2

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は本考案の一実施例である液圧装置の構成を示す
図である。１０：左前輪ブレーキ、１２：右前輪ブレーキ、１４：
左後輪ブレーキ、１６：右後輪ブレーキ、１８：マスク
シリンダ、２０．　２２：液圧室、３６゜３８：フロポ
ーショニングバルフ、５０．　５２：ノ々ルブピストン
、６６、　６８：基部（端部）。FIG. 1 is a diagram showing the configuration of a hydraulic device that is an embodiment of the present invention. 10: Left front wheel brake, 12: Right front wheel brake, 14:
Left rear wheel brake, 16: Right rear wheel brake, 18: Mask cylinder, 20. 22: Hydraulic pressure chamber, 36° 38: Flow portioning valve, 50. 52: Novel piston, 66, 68: Base (end).

Claims

[Scope of utility model registration request]

The hydraulic pressure generated in the two mutually independent hydraulic chambers of the mask cylinder is applied to the vehicle's left front wheel brake and right rear wheel brake, and the right front wheel brake and left rear wheel through two mutually independent piping systems. In the X piping type hydraulic device that is transmitted to the wheel brakes, a pair of proportioning is provided in the front wheel piping portions of the two piping systems that transmit the hydraulic pressure of the mask cylinder to the left front wheel brake and the right front wheel brake, respectively. The valves or limit valves are arranged such that the directions of their valve pistons toward the working position are opposite to each other, and the end of one valve piston can be moved relative to the end of the other valve piston in the axial direction. furthermore, the hydraulic pressure of the piping portion on the side where the other valve piston belongs is applied to the end face of the one valve piston end that is fitted into the end of the other valve piston. The hydraulic pressure of the piping section on the side to which the one valve piston belongs is applied to the end face of the other valve piston end on the outer peripheral side of the valve piston end, respectively, toward the non-acting position of the valve piston, and the two systems If both are normal, the hydraulic pressure control operations of both valve pistons are blocked by the action of hydraulic pressure, but 1
If a system is unable to raise the hydraulic pressure, the hydraulic pressure of that system will allow the hydraulic pressure control operation of the valve piston that was being applied to the end face, and the braking hydraulic pressure transmitted to the front wheel brakes of other systems will be reduced. An X-piped hydraulic device for a vehicle brake, characterized in that the hydraulic pressure is suppressed.