JPS60127269U

JPS60127269U - Brake hydraulic pressure control valve

Info

Publication number: JPS60127269U
Application number: JP1559284U
Authority: JP
Inventors: 浅原　誠
Original assignee: トヨタ自動車株式会社
Priority date: 1984-02-06
Filing date: 1984-02-06
Publication date: 1985-08-27

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 the drawing]

第１図は来者案力釦−−ドセンシングプロポーショニン
グバルブ示適用された場合の一実施例を示す正面断面図
で、液圧ブレーキ装置の系統図とともに示したものであ
る。第２図は第１図の実施例　　。の作動を説明する図で、リヤホイールシリンダ液圧Ｐｗ
とマスクシリンダ液圧Ｐｍとの関係を示すグ　　　。ラフである。１０：ロードセンシングプロポーショニングバルブ（液
圧制御弁）、′１２：マスクシリンダ、２２：フロント
ホイールシリンダ（ブレーキシリンダ）、２８：リヤホ
イールシリンダ、３４：第一　　　　−゛ポート、３６
：第二ポート、３８：ハウジング、４０：第一ピストン
、４２：第二ピストン、５３：圧縮コイルスプリング（
第ニスプリング）、６４：カット弁、６６：圧縮コイル
スプリング（第一スプリング）、７０：第一液圧室、７
２：第二液圧室。FIG. 1 is a front sectional view showing an embodiment of the present invention in which a visitor control button--de-sensing proportioning valve is applied, together with a system diagram of a hydraulic brake system. FIG. 2 is an example of the embodiment shown in FIG. This is a diagram explaining the operation of rear wheel cylinder hydraulic pressure Pw.
The graph shows the relationship between Pm and mask cylinder hydraulic pressure Pm. It's rough. 10: Load sensing proportioning valve (hydraulic pressure control valve), '12: Mask cylinder, 22: Front wheel cylinder (brake cylinder), 28: Rear wheel cylinder, 34: First port, 36
: Second port, 38: Housing, 40: First piston, 42: Second piston, 53: Compression coil spring (
(second spring), 64: cut valve, 66: compression coil spring (first spring), 70: first hydraulic chamber, 7
2: Second hydraulic chamber.

Claims

[Claim for Utility Model Registration] A hydraulic pressure control valve provided in a hydraulic brake system of an automobile to control the hydraulic pressure supplied from a mask cylinder to a brake cylinder, the first port being connected to the mask cylinder. and a second port connected to a brake cylinder, and a hollow space in the housing is formed into a first hydraulic pressure chamber on the first port side and a second hydraulic pressure chamber on the second port side. a cut valve that is movable in the axial direction in the housing, and moves forward to open the cut valve and retreats to close the cut valve, and when the cut valve is open, the cut valve is in communication with each other; The hydraulic pressure of the first hydraulic pressure chamber and the second hydraulic pressure chamber urges the hydraulic pressure chamber in the backward direction. A first piston that receives the hydraulic pressure of the first hydraulic pressure chamber in the forward direction on a pressure receiving area that is smaller than the pressure receiving area that receives the hydraulic pressure of the hydraulic pressure chamber; 1. A first spring that biases the first piston in the forward direction; (above) In one housing, there is a retracted position in which the first piston does not contact the first piston even when the first piston is retracted to the position where the cut valve is closed, and a retracted position in which the first piston does not contact the first piston and prevents the first piston from retracting when it contacts the first piston. a second piston that is movable between the second piston and the forward blocking position; a second spring that is disposed between the second piston and the nozzle housing and biases the second piston in the backward direction; means for applying the hydraulic pressure in the first hydraulic pressure chamber to bias the second piston in the forward direction, and the set load of the first spring and the second spring is such that A brake fluid characterized in that when the pressure is gradually increased, the first piston moves backward, and when the fluid pressure is further increased, the second piston moves forward. Pressure control valve.