JPH0328068U - - Google Patents
Info
- Publication number
- JPH0328068U JPH0328068U JP8509490U JP8509490U JPH0328068U JP H0328068 U JPH0328068 U JP H0328068U JP 8509490 U JP8509490 U JP 8509490U JP 8509490 U JP8509490 U JP 8509490U JP H0328068 U JPH0328068 U JP H0328068U
- Authority
- JP
- Japan
- Prior art keywords
- piston
- pressure reducing
- reducing valve
- proportional pressure
- valve
- 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.)
- Granted
Links
- 239000000725 suspension Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Hydraulic Control Valves For Brake Systems (AREA)
Description
第１図は本考案に係る比例減圧弁の減圧作動中
の断面図、第２図はエア圧とピストンの推力との
関係を示すグラフ、第３図は従来の比例減圧弁を
備えた車両用ブレーキ油圧制御装置の回路構成図
、第４図は従来の比例減圧弁を備えた車両用積載
荷重感知式制動液圧制御装置の回路構成図である
。
１０……比例減圧弁ユニツト、１０ａ，１０ｂ
……比例減圧弁、１１〜１３……弁ケース、１２
ｄ……ストツパ、１７ａ，１７ｂ……弁体、２２
……第２ピストン、２７……第１ピストン、２８
……第１スプリング、２９……第２スプリング、
３０……補助ロツド。
Figure 1 is a cross-sectional view of the proportional pressure reducing valve according to the present invention during pressure reducing operation, Figure 2 is a graph showing the relationship between air pressure and piston thrust, and Figure 3 is for a vehicle equipped with a conventional proportional pressure reducing valve. FIG. 4 is a circuit diagram of a brake hydraulic pressure control device of a conventional vehicle load sensing type brake hydraulic pressure control device equipped with a proportional pressure reducing valve. 10...Proportional pressure reducing valve unit, 10a, 10b
...Proportional pressure reducing valve, 11-13 ...Valve case, 12
d... Stopper, 17a, 17b... Valve body, 22
...Second piston, 27...First piston, 28
...first spring, 29...second spring,
30... Auxiliary rod.
Claims (1)
車輪ブレーキとが、比例減圧弁が介設された油路
で連結されていて、該比例減圧弁がエアサスペン
シヨンからのエア圧で減圧作用開始圧力が変化さ
れるようになつているものにおいて、 上記比例減圧弁の弁ケース内のエア導入室には
最小エア圧から最大エア圧までの間で、要求推力
がでる断面積よりも大きな断面積を有する第１ピ
ストンが設けられ、該弁ケース内の調節室には比
例減圧弁の弁体の推力を調節する第２ピストンが
設けられていて、 第１ピストンと第２ピストンとの間には、第１
ピストンをエア導入室の底部当接位置に付勢し、
第２ピストンを介して比例減圧弁の弁体を非作動
方向に付勢する第１スプリングが設けられ、第１
ピストンには、第１ピストンを底部当接位置に付
勢する第２スプリングが設けられる一方、第１ピ
ストンに対して、第１ピストンの推力が最大エア
圧以上とならないように規制するストツパが設け
られていることを特徴とする比例減圧弁。[Scope of Claim for Utility Model Registration] A master cylinder operated by a brake pedal and a wheel brake are connected by an oil passage in which a proportional pressure reducing valve is installed, and the proportional pressure reducing valve receives air pressure from an air suspension. In the proportional pressure reducing valve, the air introduction chamber inside the valve case has a cross-sectional area from the minimum air pressure to the maximum air pressure, which is larger than the cross-sectional area where the required thrust is generated. A first piston having a large cross-sectional area is provided, and a second piston for adjusting the thrust of the valve body of the proportional pressure reducing valve is provided in an adjustment chamber in the valve case, and the first piston and the second piston are connected to each other. Between the first
Force the piston to contact the bottom of the air introduction chamber,
A first spring is provided that biases the valve body of the proportional pressure reducing valve in a non-operating direction via the second piston, and
The piston is provided with a second spring that urges the first piston to a bottom contact position, and a stopper is provided with respect to the first piston to restrict the thrust of the first piston from exceeding a maximum air pressure. A proportional pressure reducing valve characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8509490U JPH0449020Y2 (en) | 1990-08-10 | 1990-08-10 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8509490U JPH0449020Y2 (en) | 1990-08-10 | 1990-08-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0328068U true JPH0328068U (en) | 1991-03-20 |
| JPH0449020Y2 JPH0449020Y2 (en) | 1992-11-18 |
Family
ID=31634020
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8509490U Expired JPH0449020Y2 (en) | 1990-08-10 | 1990-08-10 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0449020Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004192462A (en) * | 2002-12-12 | 2004-07-08 | Max Co Ltd | Pressure reducing valve |
-
1990
- 1990-08-10 JP JP8509490U patent/JPH0449020Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0449020Y2 (en) | 1992-11-18 |
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