JPS5970866U

JPS5970866U - Brake hydraulic pressure control device

Info

Publication number: JPS5970866U
Application number: JP16672082U
Authority: JP
Inventors: 弘之岡
Original assignee: トヨタ自動車株式会社
Priority date: 1982-11-02
Filing date: 1982-11-02
Publication date: 1984-05-14

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、本考案の一実施例である液圧制御装置を赤す
正面断面図である。第２図は、上記液圧制御装置の作用
効果を説明するためのグラフである。第３図は比較のた
めに示すものであって、従来の液圧制御装置における第
２図に相当する図である。第４図は第３図に制御特性を
示した従来の液圧制御装置の断面図である。２：ハウジング本体、１５：慣性弁室、２４：減圧弁室
、２６：制御液圧室、４２．　４４．　６２：弁座、４
５：固定金具、４６：摺動筒、４Ｂ、　　６０．　７８
゜８６：圧縮スプリング、５４：ボール、５６．　９４
：慣性弁、５８：減圧弁子、６４：ばね受、６６：ロッ
ド、７０：常閉減圧弁、７２：ピストン、８１：減圧弁
制御装置、８２：常開弁子、８３：ピストン、８８：液
圧室、９２：常開バイパス弁。FIG. 1 is a front sectional view of a hydraulic pressure control device which is an embodiment of the present invention. FIG. 2 is a graph for explaining the effects of the hydraulic pressure control device. FIG. 3 is shown for comparison and corresponds to FIG. 2 in a conventional hydraulic pressure control device. FIG. 4 is a sectional view of the conventional hydraulic pressure control device whose control characteristics are shown in FIG. 3. 2: housing main body, 15: inertia valve chamber, 24: pressure reducing valve chamber, 26: control hydraulic pressure chamber, 42. 44. 62: Valve seat, 4
5: Fixing metal fittings, 46: Sliding tube, 4B, 60. 78
゜86: Compression spring, 54: Ball, 56. 94
: inertia valve, 58: pressure reducing valve element, 64: spring bearing, 66: rod, 70: normally closed pressure reducing valve, 72: piston, 81: pressure reducing valve control device, 82: normally open valve element, 83: piston, 88: Hydraulic pressure chamber, 92: Normally open bypass valve.

Claims

[Claims for Utility Model Registration] A hydraulic pressure control device that is installed in a vehicle hydraulic brake device and controls hydraulic pressure transmitted from a mask cylinder to a wheel cylinder of a rear wheel brake, the device comprising: It is provided in the liquid passage connecting the wheel cylinder and is always located away from the valve seat, and when the deceleration of the vehicle reaches a predetermined value, it seats on the valve seat and directs the liquid i-path. an inertia valve having an inertia valve that is connected to the liquid passageway in parallel with the inertia valve; This is closed, but when the hydraulic pressure of the mask cylinder reaches the activation start pressure, it starts operating, and from then on, the mask cylinder hydraulic pressure is reduced by a set amount and transmitted to the wheel cylinder. a normally closed pressure reducing valve; a pressure reducing valve control device that reduces the set pressure reduction amount of the pressure reducing valve as the hydraulic pressure increases when the inertia valve is closed; includes a normally open bypass valve that opens to communicate the mask cylinder side portion and the wheel cylinder side portion of the liquid passage, and closes when the liquid pressure in the liquid passage reaches a predetermined value. A brake fluid pressure control device featuring: