JPS62150578U - - Google Patents
Info
- Publication number
- JPS62150578U JPS62150578U JP3815886U JP3815886U JPS62150578U JP S62150578 U JPS62150578 U JP S62150578U JP 3815886 U JP3815886 U JP 3815886U JP 3815886 U JP3815886 U JP 3815886U JP S62150578 U JPS62150578 U JP S62150578U
- Authority
- JP
- Japan
- Prior art keywords
- piston
- accumulation
- fuel
- pressurizing chamber
- pressure
- 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
- 238000009825 accumulation Methods 0.000 claims description 15
- 238000002347 injection Methods 0.000 claims description 11
- 239000007924 injection Substances 0.000 claims description 11
- 239000000446 fuel Substances 0.000 claims description 9
Description
第１図乃至第４図は本考案の燃料噴射ポンプの
パイロツト噴射装置の第１実施例を示し、第１図
は、本パイロツト噴射装置全体の構成を表わす断
面図、第２図はこのパイロツト噴射装置が取付け
られる燃料噴射ポンプの構成を表わす断面図、第
３図はアキユムレートピストンの移動する行程に
対するアキユムレートピストンの速度及び単位時
間当りの流出燃料の変化を表わすグラフ、第４図
ａは第３図に対応して加圧室が圧力上昇し始めた
ときのアキユムレートピストン部分を拡大して表
わす断面図、第４図ｂは加圧室の燃料圧力を受け
、移動する途中のアキユムレートピストン部分を
拡大して表わす断面図、第５図は本考案のパイロ
ツト噴射装置の第２実施例におけるアキユムレー
トピストン部分を拡大して表わした断面図、第６
図はこのアキユムレートピストンに形成された溝
の形状を表わす第５図Ａ―Ａ線断面図、第７図は
本考案のパイロツト噴射装置の第３実施例におけ
るアキユムレートピストン部分を拡大して表わし
た断面図、第８図はこのアキユムレートピストン
に形成された貫通孔を表わす第７図Ｂ―Ｂ線断面
図、である。
１…燃料噴射ポンプ、１７…加圧室、２０…パ
イロツト噴射装置、４３，７３，８３…アキユム
レートピストン、４３ｃ…アキユムレートピスト
ン中径部、４３ｄ，７３ｃ，８３ｃ…アキユムレ
ートピストン小径部、４３ｆ…テーパ状段部、４
４…シリンダ、４５，７５，８５…ストツパ、４
５ａ，７５ａ…ストツパ中空部、４７…プレツシ
ヤピン、４６…スプリング、７６…溝、８６…貫
通孔。
1 to 4 show a first embodiment of a pilot injection device for a fuel injection pump according to the present invention, FIG. 1 is a sectional view showing the overall configuration of the pilot injection device, and FIG. FIG. 3 is a cross-sectional view showing the configuration of a fuel injection pump to which the device is attached; FIG. 3 is a graph showing changes in the speed of the accumulation piston and the amount of fuel flowing out per unit time with respect to the stroke of the accumulation piston; FIG. 4 a 3 is an enlarged cross-sectional view of the accumulation piston when the pressure in the pressurizing chamber begins to rise, and FIG. FIG. 5 is an enlarged cross-sectional view of the accumulation piston portion in the second embodiment of the pilot injection device of the present invention; FIG.
The figure is a sectional view taken along the line A--A in Figure 5 showing the shape of the groove formed in this accumulation piston, and Figure 7 is an enlarged view of the accumulation piston part in the third embodiment of the pilot injection device of the present invention. FIG. 8 is a cross-sectional view taken along the line B--B in FIG. 7 showing a through hole formed in this accumulation piston. DESCRIPTION OF SYMBOLS 1... Fuel injection pump, 17... Pressurization chamber, 20... Pilot injection device, 43, 73, 83... Accumulation rate piston, 43c... Accumulation rate piston medium diameter part, 43d, 73c, 83c... Accumulation rate piston small diameter Part, 43f...Tapered step part, 4
4... Cylinder, 45, 75, 85... Stopper, 4
5a, 75a...stopper hollow part, 47...pressure pin, 46...spring, 76...groove, 86...through hole.
Claims (1)
形成されたシリンダと、 該シリンダ内に嵌挿され、上記加圧室の燃料圧
力により押圧移動されるアキユムレートピストン
と、 該アキユムレートピストンを上記加圧室側に押
圧付勢するスプリングと、 上記アキユムレートピストンの上記加圧室の圧
力上昇により移動する移動量を制限するストツパ
と、 を備え、 上記アキユムレートピストンに、上記加圧室の
圧力上昇により当該アキユムレートピストンが移
動するとき、燃料の上記シリンダから上記燃料低
圧室への流れを抑制する絞り部を形成してなるこ
と を特徴とする燃料噴射ポンプのパイロツト噴射装
置。[Scope of Claim for Utility Model Registration] A cylinder formed between a pressurizing chamber and a low fuel pressure chamber of a fuel injection pump; An accumulation rate piston, a spring that presses and biases the accumulation rate piston toward the pressurizing chamber, and a stopper that limits the amount of movement of the accumulation rate piston due to an increase in pressure in the pressurizing chamber. , wherein the accumulation piston is formed with a constriction portion that suppresses the flow of fuel from the cylinder to the fuel low pressure chamber when the accumulation piston moves due to an increase in pressure in the pressurizing chamber. Features a pilot injection device for fuel injection pumps.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3815886U JPS62150578U (en) | 1986-03-14 | 1986-03-14 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3815886U JPS62150578U (en) | 1986-03-14 | 1986-03-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62150578U true JPS62150578U (en) | 1987-09-24 |
Family
ID=30850140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3815886U Pending JPS62150578U (en) | 1986-03-14 | 1986-03-14 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62150578U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59145360A (en) * | 1983-01-13 | 1984-08-20 | ロ−ベルト・ボツシユ・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング | Fuel jet pump |
-
1986
- 1986-03-14 JP JP3815886U patent/JPS62150578U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59145360A (en) * | 1983-01-13 | 1984-08-20 | ロ−ベルト・ボツシユ・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング | Fuel jet pump |
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