JPS62148773U - - Google Patents
Info
- Publication number
- JPS62148773U JPS62148773U JP3598386U JP3598386U JPS62148773U JP S62148773 U JPS62148773 U JP S62148773U JP 3598386 U JP3598386 U JP 3598386U JP 3598386 U JP3598386 U JP 3598386U JP S62148773 U JPS62148773 U JP S62148773U
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- cylinder
- piston
- chamber
- damping
- 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
- 238000002347 injection Methods 0.000 claims description 12
- 239000007924 injection Substances 0.000 claims description 12
- 239000000446 fuel Substances 0.000 claims description 11
- 238000013016 damping Methods 0.000 claims description 9
- 238000009825 accumulation Methods 0.000 claims description 3
Landscapes
- Fuel-Injection Apparatus (AREA)
Description
第1図乃至第4図は本考案の一実施例を示し、
第1図は本実施例のパイロツト噴射装置の構成を
表わす断面図、第2図はこのパイロツト噴射装置
に用いられる燃料噴射ポンプの構成を表わす断面
図、第3図a〜eはリリース孔の形状を示す断面
図、第4図a〜dは、アキユムレートピストンの
移動量と移動速度の関係を示すグラフである。
1……燃料噴射ポンプ、17……加圧室、20
……パイロツト噴射装置、43……アキユムレー
トピストン、44……シリンダ、45……ストツ
パ、46……スプリング、55……背後室、56
……ダンピングシリンダ、57……ダンピングピ
ストン、62……リリース孔。
1 to 4 show an embodiment of the present invention,
Fig. 1 is a sectional view showing the configuration of the pilot injection device of this embodiment, Fig. 2 is a sectional view showing the configuration of the fuel injection pump used in this pilot injection device, and Figs. 3 a to e show the shape of the release hole. 4A to 4D are graphs showing the relationship between the amount of movement and the speed of movement of the accumulation piston. 1... Fuel injection pump, 17... Pressurization chamber, 20
... Pilot injection device, 43 ... Accumulate piston, 44 ... Cylinder, 45 ... Stopper, 46 ... Spring, 55 ... Back chamber, 56
...damping cylinder, 57 ... damping piston, 62 ... release hole.
Claims (1)
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、 該シリンダの後方に連通して設けられた背後室
と、 該背後室内に設けられ、プレツシヤピンを介し
て上記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、上記加圧室内
の燃料圧力により移動する移動量を制限するスト
ツパと、 を備え、上記燃料噴射ポンプの燃料主噴射の前に
パイロツト噴射を実行させるパイロツト噴射装置
において、 上記背後室にリターン通路を介して燃料低圧室
と連通するダンピングシリンダを設けると共に、 該ダンピングシリンダには上記プレツシヤピン
を介して前記アキユムレートピストンに連動する
ダンピングピストンを嵌挿し、 更に前記ダンピングシリンダの一部に、上記ダ
ンピングピストンにより開閉され、前記背後室内
の燃料を該ダンピングシリンダ内に流すリリース
孔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 connected to a pressurizing chamber of a fuel injection pump through a communication hole, and an accumulator that is inserted into the cylinder and is pressed and moved by the fuel pressure in the pressurizing chamber. a piston; a rear chamber provided in communication with the rear of the cylinder; a spring provided in the rear chamber to press and bias the accumulation piston toward the pressurizing chamber via a pressure pin; a stopper for restricting the amount of movement of the umrate piston by fuel pressure in the pressurizing chamber; and a pilot injection device for performing pilot injection before main fuel injection of the fuel injection pump, wherein the rear chamber is provided with a damping cylinder that communicates with the fuel low pressure chamber via a return passage, and a damping piston interlocked with the accumulation piston is inserted into the damping cylinder via the pressure pin, and further a part of the damping cylinder is provided with a damping cylinder that communicates with the fuel low pressure chamber through a return passage. A pilot injection device for a fuel injection pump, characterized in that a release hole is formed that is opened and closed by the damping piston and allows the fuel in the rear chamber to flow into the damping cylinder.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3598386U JPS62148773U (en) | 1986-03-12 | 1986-03-12 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3598386U JPS62148773U (en) | 1986-03-12 | 1986-03-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS62148773U true JPS62148773U (en) | 1987-09-19 |
Family
ID=30845972
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3598386U Pending JPS62148773U (en) | 1986-03-12 | 1986-03-12 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS62148773U (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58190561A (en) * | 1982-04-30 | 1983-11-07 | Nippon Denso Co Ltd | Fuel injection pump |
JPS5941656B2 (en) * | 1981-03-31 | 1984-10-08 | 工業技術院長 | Method for imparting anticoagulant properties to regenerated cellulose |
JPS60111054A (en) * | 1983-11-18 | 1985-06-17 | Toyota Motor Corp | Fuel injection device for diesel engine |
-
1986
- 1986-03-12 JP JP3598386U patent/JPS62148773U/ja active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5941656B2 (en) * | 1981-03-31 | 1984-10-08 | 工業技術院長 | Method for imparting anticoagulant properties to regenerated cellulose |
JPS58190561A (en) * | 1982-04-30 | 1983-11-07 | Nippon Denso Co Ltd | Fuel injection pump |
JPS60111054A (en) * | 1983-11-18 | 1985-06-17 | Toyota Motor Corp | Fuel injection device for diesel engine |