JPS6226278U - - Google Patents
Info
- Publication number
- JPS6226278U JPS6226278U JP12269086U JP12269086U JPS6226278U JP S6226278 U JPS6226278 U JP S6226278U JP 12269086 U JP12269086 U JP 12269086U JP 12269086 U JP12269086 U JP 12269086U JP S6226278 U JPS6226278 U JP S6226278U
- Authority
- JP
- Japan
- Prior art keywords
- control valve
- pressure
- pump
- power steering
- steering device
- 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
- 238000011144 upstream manufacturing Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
Description
第１図は本考案による動力舵取り装置用制御弁
の一実施例を示す水平断面図、第２図は従来の圧
力補償機構付方向切換弁を動力舵取り用に容いた
場合の車速と最大ステアリング流量の関係を示す
図、第３図は本考案の動力舵取り装置用制御弁の
車速と最大ステアリング流量との関係を示す図で
ある。
１……エンジン、２……タンク、３……主ポン
プ、４……補助ポンプ、１１……シリンダ、１２
……圧力補償機構、１３……方向切換弁、１４…
…ハウジング、１７……分流室、２５，２６……
制限通路、２７……固定オリフイス、３９……通
路、３８……副シリンダ、６３，６４……可変オ
リフイス。
Fig. 1 is a horizontal sectional view showing an embodiment of the control valve for a power steering device according to the present invention, and Fig. 2 shows the vehicle speed and maximum steering flow rate when a conventional directional control valve with a pressure compensation mechanism is used for power steering. FIG. 3 is a diagram showing the relationship between the vehicle speed and the maximum steering flow rate of the power steering control valve of the present invention. 1...Engine, 2...Tank, 3...Main pump, 4...Auxiliary pump, 11...Cylinder, 12
...Pressure compensation mechanism, 13...Directional switching valve, 14...
...Housing, 17...Diversion chamber, 25, 26...
Restriction passage, 27... Fixed orifice, 39... Passage, 38... Sub cylinder, 63, 64... Variable orifice.
Claims (1)
切換弁の上流側に直列に接続され、前記方向切換
弁の可変オリフイスの前後差圧および開口度に応
じて定まる流量を前記方向切換弁へ供給し、かつ
残流量をタンクへバイパスせしめて前記差圧を一
定となす圧力補償機構と、エンジンにて駆動され
るポンプと、車輪の回転によつて駆動されると共
に吐出通路を前記主ポンプの吐出通路に接続した
補助ポンプと、主ポンプから補助ポンプへの逆流
を防ぐチエツク弁とからなる動力舵取り装置に用
いる動力舵取り装置用制御弁において、 前記方向切換弁への供給流量を前記補助ポンプ
の吐出通路中に設けた固定オリフイスの前後の差
圧に応じて漸減するため、前記圧力差に応じた力
を前記圧力補償機構のスプールに作用すべく設け
られた副ピストンと、同副ピストンに対して設け
られ前記圧力差が所定値を越えるまで該副ピスト
ンの移動を押さえるよう付勢されたスプリングと
を設けたことを特長とする動力舵取り装置用制御
弁。[Claims for Utility Model Registration] A directional control valve having a variable orifice, which is connected in series on the upstream side of the same direction control valve, and has a flow rate determined according to the differential pressure across and the opening degree of the variable orifice of the directional control valve. a pressure compensation mechanism that supplies the directional control valve and makes the differential pressure constant by bypassing the residual flow to the tank; a pump driven by the engine; and a discharge passage driven by the rotation of the wheels. A control valve for a power steering device used in a power steering device comprising an auxiliary pump connected to a discharge passage of the main pump, and a check valve that prevents backflow from the main pump to the auxiliary pump, the supply flow rate to the directional switching valve. an auxiliary piston provided to apply a force corresponding to the pressure difference to the spool of the pressure compensating mechanism in order to gradually reduce the pressure in accordance with the pressure difference before and after a fixed orifice provided in the discharge passage of the auxiliary pump; A control valve for a power steering device, characterized in that a spring is provided for the sub-piston and biased to suppress movement of the sub-piston until the pressure difference exceeds a predetermined value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12269086U JPS6335898Y2 (en) | 1986-08-08 | 1986-08-08 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12269086U JPS6335898Y2 (en) | 1986-08-08 | 1986-08-08 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6226278U true JPS6226278U (en) | 1987-02-18 |
| JPS6335898Y2 JPS6335898Y2 (en) | 1988-09-22 |
Family
ID=31013117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12269086U Expired JPS6335898Y2 (en) | 1986-08-08 | 1986-08-08 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6335898Y2 (en) |
-
1986
- 1986-08-08 JP JP12269086U patent/JPS6335898Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6335898Y2 (en) | 1988-09-22 |
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