JPS63112962U - - Google Patents
Info
- Publication number
- JPS63112962U JPS63112962U JP540087U JP540087U JPS63112962U JP S63112962 U JPS63112962 U JP S63112962U JP 540087 U JP540087 U JP 540087U JP 540087 U JP540087 U JP 540087U JP S63112962 U JPS63112962 U JP S63112962U
- Authority
- JP
- Japan
- Prior art keywords
- valve
- pressure
- piston
- master cylinder
- rear wheel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000001965 increasing effect Effects 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims 6
- 239000007788 liquid Substances 0.000 claims 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Hydraulic Control Valves For Brake Systems (AREA)
Description
第1図は本考案の一実施例である液圧制御装置
の正面断面図である。第2図は上記液圧制御装置
を備えた液圧ブレーキ装置を概略的に示す系統図
である。第3図は上記液圧制御装置の制御特性を
示すグラフである。
10:マスタシリンダ、32:リヤブレーキシ
リンダ、34:プロポーシヨニングバルブ(PV
)、35:後輪荷重検知機構、36:液圧制御シ
リンダ、38:増圧器、50:バルブピストン、
52:弁子、54:弁座部材、56:開閉弁、5
8:圧縮コイルスプリング、60:マスタシリン
ダ側液圧室、62:リヤブレーキシリンダ側液圧
室、72:棒ばね、80:制御ピストン、82:
制御液圧室、90:増圧ピストン、92:大径部
、94:中径部、108:開閉弁、110:ボー
ル。
FIG. 1 is a front sectional view of a hydraulic pressure control device that is an embodiment of the present invention. FIG. 2 is a system diagram schematically showing a hydraulic brake device equipped with the above-mentioned hydraulic pressure control device. FIG. 3 is a graph showing the control characteristics of the hydraulic pressure control device. 10: Master cylinder, 32: Rear brake cylinder, 34: Proportioning valve (PV
), 35: Rear wheel load detection mechanism, 36: Hydraulic pressure control cylinder, 38: Pressure intensifier, 50: Valve piston,
52: Valve element, 54: Valve seat member, 56: Open/close valve, 5
8: Compression coil spring, 60: Master cylinder side hydraulic pressure chamber, 62: Rear brake cylinder side hydraulic pressure chamber, 72: Rod spring, 80: Control piston, 82:
Control hydraulic pressure chamber, 90: pressure increasing piston, 92: large diameter section, 94: medium diameter section, 108: opening/closing valve, 110: ball.
Claims (1)
リヤブレーキシリンダとを接続する液通路に設け
られてマスタシリンダ液圧を減圧してリヤブレー
キシリンダに伝達するプロポーシヨニングバルブ
と、 後輪荷重の変動に伴つて変位する負荷部材を有
し、後輪荷重を検知してその荷重に対応する付勢
力を前記負荷部材により前記プロポーシヨニング
バルブのバルブピストンに加える後輪荷重検知機
構と を備えた自動車用ブレーキ液圧制御装置において
、の液圧により作動して当該プロポーシヨニング
バルブのバルブピストンに前記液通路を遮断させ
る向きの力を加える制御ピストンを付加するとと
もに、前記バルブピストンが減圧動作を開始した
後に作動を開始し、前記マスタシリンダ液圧を増
圧して前記制御液圧室へ供給する増圧器を前記後
輪荷重検知機構とは反対側の位置においてプロポ
ーシヨニングバルブと同軸に設け、かつ、その増
圧器の増圧率と前記制御ピストンの前記制御液圧
室に対する受圧面積との積が、前記液通路が遮断
された状態における前記バルブピストンの前記マ
スタシリンダ液圧に対する受圧面積より大きくな
るようにし、さらに、前記増圧器の増圧ピストン
にそれを軸方向に貫通する連通路とその連通路を
開閉する開閉弁とを設けるとともに、前記バルブ
ピストンを貫通し、一端がその開閉弁の弁子に当
接し、他端が前記負荷部材に当接するロツドを設
け、そのロツドが、常には前記開閉弁を開いて前
記増圧器が増圧作用を為さないようにし、前記負
荷部材が前記バルブピストンから離れた状態では
開閉弁が閉じることを許容して増圧器に増圧作用
を為さしめるようにしたことを特徴とする自動車
用ブレーキ液圧制御装置。[Scope of Claim for Utility Model Registration] A proportioning valve that is installed in a fluid passage connecting a master cylinder and a rear brake cylinder of an automobile hydraulic brake system to reduce master cylinder fluid pressure and transmit it to the rear brake cylinder. , a rear wheel load detection device that has a load member that is displaced in accordance with changes in rear wheel load, detects the rear wheel load, and applies a biasing force corresponding to the load to the valve piston of the proportioning valve by the load member. In the brake fluid pressure control device for an automobile, the control piston is actuated by the fluid pressure of the proportioning valve to apply a force in a direction to block the fluid passage to the valve piston of the proportioning valve. a proportioning valve that starts operating after the piston starts depressurizing operation, and a pressure intensifier that increases the master cylinder hydraulic pressure and supplies it to the control hydraulic pressure chamber at a position opposite to the rear wheel load detection mechanism; and the product of the pressure increase rate of the pressure intensifier and the pressure receiving area of the control piston with respect to the control hydraulic pressure chamber is the master cylinder hydraulic pressure of the valve piston in the state where the liquid passage is blocked. Further, the pressure increasing piston of the pressure intensifier is provided with a communication passage passing through it in the axial direction and an on-off valve for opening and closing the communication passage, and a valve that passes through the valve piston and has one end. providing a rod whose other end abuts the valve element of the on-off valve and the other end abuts on the load member, and the rod normally opens the on-off valve to prevent the pressure booster from exerting a pressure increasing action; A brake fluid pressure control device for an automobile, characterized in that when the load member is separated from the valve piston, an on-off valve is allowed to close, thereby causing a pressure intensifier to perform a pressure increasing action.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP540087U JPS63112962U (en) | 1987-01-16 | 1987-01-16 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP540087U JPS63112962U (en) | 1987-01-16 | 1987-01-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS63112962U true JPS63112962U (en) | 1988-07-20 |
Family
ID=30786949
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP540087U Pending JPS63112962U (en) | 1987-01-16 | 1987-01-16 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS63112962U (en) |
-
1987
- 1987-01-16 JP JP540087U patent/JPS63112962U/ja active Pending
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