JPS5970863U

JPS5970863U - Brake hydraulic pressure control device

Info

Publication number: JPS5970863U
Application number: JP16671782U
Authority: JP
Inventors: 弘之岡
Original assignee: Toyota Motor Corp
Current assignee: Toyota Motor Corp
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示す
正面断面図である。第２図は、実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。　　　　　　− ２：ハウジング本体、１５：慣性弁室、２４：減圧弁室
、２６：制御液圧室、゛２８：ピストン室、４２゜４４
．６２：弁座、４５：固定金具、４６：摺動筒、４８．
６０．７８．１１２：圧縮スプリング、５４：ボール、
５６：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、１００：差動ピストン、１０８：第１受
圧面、１１０：第２受圧面。FIG. 1 is a front sectional view showing a hydraulic pressure control device that is an embodiment of the present invention. FIG. 2 is a graph for explaining the effects of the actual hydraulic pressure control device. FIG. 3 is shown for comparison and corresponds to FIG. 2 in a conventional hydraulic pressure control device. - 2: Housing body, 15: Inertial valve chamber, 24: Pressure reducing valve chamber, 26: Control hydraulic pressure chamber, ゛28: Piston chamber, 42゜44
．． 62: Valve seat, 45: Fixing metal fittings, 46: Sliding tube, 48.
60.78.112: Compression spring, 54: Ball,
56: Inertia valve, 58: Pressure reducing valve, 64: Spring receiver, 66:
rod, 70: normally closed pressure reducing valve, 72: piston, 81: pressure reducing valve control device, 100: differential piston, 108: first pressure receiving surface, 110: second pressure receiving surface.

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 passageway that connects 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 closes the liquid passageway. an inertia valve having an inertia valve element connected to the liquid passage in parallel with the inertia valve, which is normally closed but starts operating when the liquid pressure of the mask cylinder reaches an operation start pressure; Thereafter, a normally closed pressure reducing valve with a variable pressure reduction amount that reduces the mask cylinder liquid pressure by a set amount and transmits it to the wheel cylinder, and a set pressure reduction amount of the pressure reducing valve as the liquid pressure increases when the inertial valve is closed. A pressure reducing valve control device that reduces the
- disposed fluid-tightly and slidably in a piston chamber connected to the liquid passage in parallel with the inertia valve, receiving mask cylinder liquid pressure on a first pressure-receiving surface, while having a pressure-receiving area smaller than the first pressure-receiving surface; a differential piston that receives wheel cylinder hydraulic pressure on a large and opposite second pressure receiving surface, and increases the wheel cylinder hydraulic pressure at a lower rate than the mask cylinder hydraulic pressure when the inertia valve and the normally closed pressure reducing valve are closed; A brake fluid pressure control device comprising: