JPS59159781U - Overflow valve of distribution type fuel injection pump - Google Patents
Overflow valve of distribution type fuel injection pumpInfo
- Publication number
- JPS59159781U JPS59159781U JP5436883U JP5436883U JPS59159781U JP S59159781 U JPS59159781 U JP S59159781U JP 5436883 U JP5436883 U JP 5436883U JP 5436883 U JP5436883 U JP 5436883U JP S59159781 U JPS59159781 U JP S59159781U
- Authority
- JP
- Japan
- Prior art keywords
- valve
- pump chamber
- overflow
- pump
- fuel injection
- 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
Landscapes
- Fuel-Injection Apparatus (AREA)
- Control Of Fluid Pressure (AREA)
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
第１図は従来の分配型燃料噴射ポンプのオーバフローバ
ルブを説明する断面図、第２図は分配型燃料噴射ポンプ
のポンプ室圧特性を説明するグラフ、第３図は本考案に
よる分配型燃料噴射ポンプのオーバフローバルブの一実
施例を示す縦断面図である。
１０・・・・・・分配型燃料噴射ポンプ、１０ａ・・・
・・・ポンプハウジング、１０ｂ・・・・・・ポンプ室
、１１・・・・・・オーバフローバルブ、１２・・・・
・・バルブホルダ、１３・・・・・・ピストンバルブ、
１３ａ・・・・・・小径ピストン部、１３ｂ・・・・・
・矢径ピストン部、１６・・・・・・小孔、１７・・・
・・・オーバフロ一孔、１９・・・・・・スプリング。Figure 1 is a sectional view illustrating the overflow valve of a conventional distribution type fuel injection pump, Figure 2 is a graph illustrating the pump chamber pressure characteristics of the distribution type fuel injection pump, and Figure 3 is a distribution type fuel injection according to the present invention. FIG. 2 is a longitudinal sectional view showing an embodiment of an overflow valve of a pump. 10... Distribution type fuel injection pump, 10a...
...Pump housing, 10b...Pump chamber, 11...Overflow valve, 12...
... Valve holder, 13... Piston valve,
13a... Small diameter piston part, 13b...
・Arial diameter piston part, 16...Small hole, 17...
...overflow one hole, 19...spring.
Claims (1)
スプリングとの釣合いによって作動する進角装置を備え
た分配型燃料噴射ポンプのオーバフローバルブにおいて
、前記分配型燃料噴射ポンプのポンプ室内に連通ずる小
孔と、ポンプ抵圧側に連通するオーバフロ一孔を形成し
たパルブホル′夕をポンプハウジングに配設し、該バル
ブホルダ内に前記小孔を通じてて加えられるポンプ室圧
とこれに対抗するスプリングとの釣合いにより作動する
ピストンバルブを収容し、該ピストンバルブは前記小孔
を開閉する小径ピスト７部と、バルブホルタ内に摺動す
る大径ピストン部とが形成されエンジンの始動時前記中
径ピストン部が小孔を閉塞してポンプ室圧を上昇させ、
エンジンの始動後は前記大径ピストン部が前記オーバフ
ロ一孔の開口面積をポンプ室圧に対応して増減させてポ
ンプ室内の燃料油を前記小孔からオーバフローさせ、ポ
ンプ室圧をエンジン回転数に対応してほぼ直線的に変化
させるようにしたことを特徴とする分配型燃料噴射ポン
プのオーバフローバルブ。In an overflow valve of a distribution type fuel injection pump, which is equipped with an advance device operated by the balance between the oil pressure in the pump chamber and a spring, which changes in relation to the engine speed, the overflow valve communicates with the pump chamber of the distribution type fuel injection pump. A valve holder having a small hole and an overflow hole communicating with the pump resistance side is disposed in the pump housing, and the pump chamber pressure applied through the small hole into the valve holder is controlled by a spring opposing the pressure. A piston valve that operates by balance is accommodated, and the piston valve is formed with a small diameter piston 7 that opens and closes the small hole, and a large diameter piston that slides inside the valve holder, and when the engine is started, the medium diameter piston is Blocks the small hole and increases the pump chamber pressure,
After the engine starts, the large-diameter piston increases or decreases the opening area of the overflow hole in accordance with the pump chamber pressure, causing the fuel oil in the pump chamber to overflow from the small hole, thereby adjusting the pump chamber pressure to the engine rotation speed. An overflow valve for a distribution type fuel injection pump, characterized in that the overflow valve changes substantially linearly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5436883U JPS59159781U (en) | 1983-04-12 | 1983-04-12 | Overflow valve of distribution type fuel injection pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5436883U JPS59159781U (en) | 1983-04-12 | 1983-04-12 | Overflow valve of distribution type fuel injection pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59159781U true JPS59159781U (en) | 1984-10-26 |
Family
ID=30184713
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5436883U Pending JPS59159781U (en) | 1983-04-12 | 1983-04-12 | Overflow valve of distribution type fuel injection pump |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59159781U (en) |
-
1983
- 1983-04-12 JP JP5436883U patent/JPS59159781U/en active Pending
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