JPH02122189U - - Google Patents
Info
- Publication number
- JPH02122189U JPH02122189U JP3139089U JP3139089U JPH02122189U JP H02122189 U JPH02122189 U JP H02122189U JP 3139089 U JP3139089 U JP 3139089U JP 3139089 U JP3139089 U JP 3139089U JP H02122189 U JPH02122189 U JP H02122189U
- Authority
- JP
- Japan
- Prior art keywords
- valve
- differential pressure
- discharge
- discharge circuit
- variable displacement
- 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
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 claims description 2
- 239000012530 fluid Substances 0.000 claims 2
- 238000000605 extraction Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 6
Description
第１図は従来例の線図、第２図は第１図の場合
の流量特性図、第３図は本考案の実施例の線図、
第４図及び第５図は第３図示の場合の流量特性図
、第６図は本考案の他の実施例の線図、第７図及
び第８図は第６図示の場合の流量特性図である。
１……可変容量ポンプ、２……内燃機関、３…
…吐出回路、４……紋り弁、７……差圧制御弁、
１１……差圧油圧点、１２……第２紋り弁。
Fig. 1 is a diagram of the conventional example, Fig. 2 is a flow rate characteristic diagram for the case of Fig. 1, and Fig. 3 is a diagram of the embodiment of the present invention.
Figures 4 and 5 are flow rate characteristic diagrams for the case shown in Figure 3, Figure 6 is a diagram of another embodiment of the present invention, and Figures 7 and 8 are flow rate characteristic diagrams for the case shown in Figure 6. It is. 1...variable displacement pump, 2...internal combustion engine, 3...
...Discharge circuit, 4...Finger valve, 7...Differential pressure control valve,
11... Differential pressure oil pressure point, 12... Second crest valve.
Claims (1)
路に紋り弁を設け、該紋り弁の前後の差圧で作動
する差圧制御弁により該可変容量ポンプのポンプ
吐出量を一定に制御するようにしたものに於いて
、該紋り弁とその下流側の差圧制御弁の差圧抽出
点との間に、該吐出回路の圧力の設定圧を越える
上昇により該吐出回路の流体を紋る第２紋り弁を
設けたことを特徴とする流体制御回路。 A stroke valve is provided in the discharge circuit of a variable displacement pump driven by an internal combustion engine, and the pump discharge amount of the variable displacement pump is controlled to be constant by a differential pressure control valve that operates based on the differential pressure before and after the stroke valve. When the pressure in the discharge circuit increases beyond the set pressure, the fluid in the discharge circuit is caused to flow between the discharge valve and the differential pressure extraction point of the differential pressure control valve downstream thereof. A fluid control circuit characterized in that a second valve is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3139089U JPH02122189U (en) | 1989-03-22 | 1989-03-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3139089U JPH02122189U (en) | 1989-03-22 | 1989-03-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02122189U true JPH02122189U (en) | 1990-10-05 |
Family
ID=31257219
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3139089U Pending JPH02122189U (en) | 1989-03-22 | 1989-03-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02122189U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61268885A (en) * | 1984-11-26 | 1986-11-28 | Nippon Denso Co Ltd | Capacity control device for variable delivery pump |
-
1989
- 1989-03-22 JP JP3139089U patent/JPH02122189U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61268885A (en) * | 1984-11-26 | 1986-11-28 | Nippon Denso Co Ltd | Capacity control device for variable delivery pump |
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