JPH0434461U - - Google Patents
Info
- Publication number
- JPH0434461U JPH0434461U JP7658590U JP7658590U JPH0434461U JP H0434461 U JPH0434461 U JP H0434461U JP 7658590 U JP7658590 U JP 7658590U JP 7658590 U JP7658590 U JP 7658590U JP H0434461 U JPH0434461 U JP H0434461U
- Authority
- JP
- Japan
- Prior art keywords
- passage
- plunger
- fuel
- needle valve
- valve
- 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
- 239000000446 fuel Substances 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Fuel-Injection Apparatus (AREA)
Description
第１図はこの考案の一実施例を示す縦断面図、
第２図はこの考案の他の実施例の要部を示す縦断
面図、第３図は従来のドツジプランジヤ付き燃料
噴射ノズルの概略構成を示すもので、第３図Ａは
ニードル弁とドツジプランジヤとの両者が着座し
た状態を示す図、第３図Ｂはニードル弁がリフト
し、ドツジプランジヤが着座した状態を示す図、
第３図Ｃはニードル弁が着座し、ドツジプランジ
ヤがリフトした状態を示す図、第３図Ｄは、ニー
ドル弁とドツジプランジヤとの両者がリフトした
状態を示す図である。
１……ノズルホルダ、４……ノズル部、６……
プラグ、７ａ……弁座（第２弁座）、９……圧油
導入室、１１……ドツジプランジヤ、１２……ノ
ズルばね、１５……第１通路、１６……第２通路
、１６ａ，１６ｂ……孔、１７……第２通路、１
７ａ，１７ｂ，１７ｃ……孔、４２……ニードル
弁、４３……弁座（第１弁座）。
FIG. 1 is a longitudinal sectional view showing an embodiment of this invention.
Fig. 2 is a longitudinal cross-sectional view showing the main part of another embodiment of this invention, Fig. 3 shows the schematic structure of a conventional fuel injection nozzle with a dodge plunger, and Fig. 3A shows the combination of a needle valve and a dodge plunger. A diagram showing a state in which both are seated, and FIG. 3B is a diagram showing a state in which the needle valve is lifted and the dodge plunger is seated.
FIG. 3C is a diagram showing a state in which the needle valve is seated and the dodge plunger is lifted, and FIG. 3D is a diagram showing a state in which both the needle valve and the dot plunger are lifted. 1... Nozzle holder, 4... Nozzle part, 6...
Plug, 7a... Valve seat (second valve seat), 9... Pressure oil introduction chamber, 11... Doji plunger, 12... Nozzle spring, 15... First passage, 16... Second passage, 16a, 16b ... Hole, 17 ... Second passage, 1
7a, 17b, 17c...hole, 42...needle valve, 43...valve seat (first valve seat).
Claims (1)
に配置されたノズルばねによつて第１弁座と第２
弁座とにそれぞれ着座させるとともに、第１通路
を介して圧送される燃料によつて前記ニードル弁
を前記ノズルばねに抗してリフトさせ、第２通路
を介して圧送される燃料によつて前記ドツジプラ
ンジヤを前記ノズルばねに抗してリフトさせ、し
かも前記ニードル弁が前記燃料によつて押圧され
る受圧面積を着座時とリフト時とでそれぞれＳＮ
１，ＳＮ２とし、前記ドツジプランジヤが前記燃
料によつて押圧される受圧面積を着座時とリフト
時とでそれぞれＳＤ１，ＳＤ２としたとき、 ＳＤ１＜ＳＮ１＜ＳＮ２＜ＳＤ２ を満足するドツジプランジヤ付き燃料噴射ノズル
において、前記第２通路を、その長さが長くなる
よう、順次連通した複数の孔によつて形成したこ
とを特徴とするドツジプランジヤ付き燃料噴射ノ
ズル。[Claims for Utility Model Registration] A needle valve and a double plunger are connected to a first valve seat and a second valve seat by a nozzle spring disposed between them.
The valve seats are respectively seated, and the needle valve is lifted against the nozzle spring by the fuel pumped through the first passage, and the needle valve is lifted against the nozzle spring by the fuel pumped through the second passage. The dotsuji plunger is lifted against the nozzle spring, and the pressure receiving area where the needle valve is pressed by the fuel is set to SN when seated and when lifted.
1 and SN 2 , and when the pressure receiving area of the dodge plunger pressed by the fuel is SD 1 and SD 2 during seating and lifting, respectively, SD 1 < SN 1 < SN 2 < SD 2 is satisfied. What is claimed is: 1. A fuel injection nozzle with a dodge plunger, characterized in that the second passage is formed by a plurality of sequentially communicating holes so that the second passage has a long length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990076585U JPH089424Y2 (en) | 1990-07-20 | 1990-07-20 | Fuel injection nozzle with dodge plunger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990076585U JPH089424Y2 (en) | 1990-07-20 | 1990-07-20 | Fuel injection nozzle with dodge plunger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0434461U true JPH0434461U (en) | 1992-03-23 |
| JPH089424Y2 JPH089424Y2 (en) | 1996-03-21 |
Family
ID=31618190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990076585U Expired - Lifetime JPH089424Y2 (en) | 1990-07-20 | 1990-07-20 | Fuel injection nozzle with dodge plunger |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH089424Y2 (en) |
-
1990
- 1990-07-20 JP JP1990076585U patent/JPH089424Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH089424Y2 (en) | 1996-03-21 |
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