JPH028675U

JPH028675U -

Info

Publication number: JPH028675U
Application number: JP8705288U
Authority: JP
Priority date: 1988-06-30
Filing date: 1988-06-30
Publication date: 1990-01-19

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例を示すアンチスキツ
ドブレーキ装置の構成図、第２図はその動作検知
手段としてのストロークスイツチの縦断面図、第
３図はその電気回路の一部構成図、第４図は本考
案の従来例を示すアンチスキツドブレーキ装置の
構成図である。Ｗ１，Ｗ２，Ｗ３，Ｗ４……車輪、７，８，１
０，１１……制動用シリンダ、２，３……（第１
、第２の）油圧配管、１……マスタシリンダ、９
……コントローラ、６……モジユレータ、１３…
…セレクトローバルブ、５０……動作検知手段（
ストロークスイツチ）、６１……第１の論理積回
路、６４……第２の論理積回路、７０……バイパ
ス回路、７１……バイパス用開閉弁。 Fig. 1 is a block diagram of an anti-skid brake device showing an embodiment of the present invention, Fig. 2 is a vertical sectional view of a stroke switch as its operation detection means, and Fig. 3 is a partial block diagram of its electric circuit. 4 is a block diagram of a conventional anti-skid brake device according to the present invention. W1, W2, W3, W4...Wheel, 7, 8, 1
0, 11...braking cylinder, 2, 3...(first
, 2nd) hydraulic piping, 1... master cylinder, 9
...Controller, 6...Modulator, 13...
...Select low valve, 50...Movement detection means (
stroke switch), 61...first AND circuit, 64...second AND circuit, 70...bypass circuit, 71...bypass opening/closing valve.

Claims

[Scope of utility model registration request]

A hydraulic brake is provided with two sets of independent hydraulic piping connecting the braking cylinders of one front and rear wheel among the braking cylinders of each wheel, and configured such that each of the hydraulic pipings is supplied with hydraulic pressure from a master cylinder, respectively. In the anti-skid brake device attached to the system, a modulator is installed in the middle of one of the two sets of hydraulic piping and performs anti-skid operation in response to a signal from the controller, and the two sets of hydraulic piping a select low valve provided between the two hydraulic pipes to reduce the hydraulic pressure difference between the two hydraulic pipes; an operation detection means provided in the select low valve for detecting the operating status of the hydraulic pressure difference reducing operation and providing feedback to the controller;
means for determining an abnormality in the modulator or select low valve based on a discrepancy between the anti-skid signal from the controller and the stroke signal from the motion detecting means and generating a fail-safe signal; An anti-skid brake device characterized by comprising fail-safe means that opens only when a signal is received, supplies hydraulic pressure from a master cylinder to one hydraulic pipe, and returns the hydraulic brake system to a normal brake line.