JPS6272470U - - Google Patents
Info
- Publication number
- JPS6272470U JPS6272470U JP16478085U JP16478085U JPS6272470U JP S6272470 U JPS6272470 U JP S6272470U JP 16478085 U JP16478085 U JP 16478085U JP 16478085 U JP16478085 U JP 16478085U JP S6272470 U JPS6272470 U JP S6272470U
- Authority
- JP
- Japan
- Prior art keywords
- fuel injection
- needle valve
- fuel
- rear end
- pump
- 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 23
- 238000002347 injection Methods 0.000 claims description 19
- 239000007924 injection Substances 0.000 claims description 19
- 230000001934 delay Effects 0.000 claims 1
- 230000001629 suppression Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Fuel-Injection Apparatus (AREA)
- High-Pressure Fuel Injection Pump Control (AREA)
Description
図面は本考案の実施例を示し、第１図は燃料噴
射ノズルの縦断面図、第２図は燃料噴射ポンプの
断面図、第３図は燃料噴射ノズルのニードル弁リ
フト量に対する噴孔の開口面積の関係を示す特性
図、第４図はエンジンの負荷に応じて変化する燃
料噴射率特性を示す特性図である。
Ａ……燃料噴射ポンプ、２……ポンプ室、６…
…プランジヤ、７……シリンダ、７ａ……高圧室
、１５……タイマピストン、１８……コントロー
ルスリーブ、２９……遠心力フライウエイト機構
、３５……噴射時期制御機構、３６……孔、３７
……燃料リリーフ通路、Ｂ……燃料噴射ノズル、
５１……燃料噴孔、５２……燃料導入口、５３…
…シリンダ、５６……燃料圧力室、５８……ニー
ドル弁、５８ｃ……受圧部、５８ｄ……弁部、５
８ｅ……スロツトル部、６０……プランジヤ部材
、６０ｃ……ピストン部、６２……圧力室。
The drawings show an embodiment of the present invention, in which Fig. 1 is a longitudinal cross-sectional view of a fuel injection nozzle, Fig. 2 is a cross-sectional view of a fuel injection pump, and Fig. 3 is a graph showing the opening of the injection hole in relation to the lift amount of the needle valve of the fuel injection nozzle. FIG. 4 is a characteristic diagram showing the relationship between areas, and FIG. 4 is a characteristic diagram showing fuel injection rate characteristics that change depending on the engine load. A...Fuel injection pump, 2...Pump chamber, 6...
... Plunger, 7 ... Cylinder, 7a ... High pressure chamber, 15 ... Timer piston, 18 ... Control sleeve, 29 ... Centrifugal flyweight mechanism, 35 ... Injection timing control mechanism, 36 ... Hole, 37
...Fuel relief passage, B...Fuel injection nozzle,
51... Fuel injection hole, 52... Fuel inlet, 53...
... Cylinder, 56 ... Fuel pressure chamber, 58 ... Needle valve, 58c ... Pressure receiving part, 58d ... Valve part, 5
8e... Throttle part, 60... Plunger member, 60c... Piston part, 62... Pressure chamber.
Claims (1)
ーフして燃料噴射時期を遅らせる噴射時期制御機
構を有する燃料噴射ポンプを備えるとともに、該
燃料噴射ポンプからの燃料圧力によりリフトして
開弁するニードル弁と、該ニードル弁の後端側に
ニードル弁と同軸上に摺動自在に設けられ、先端
がニードル弁の後端部に対峙し、後端面に燃料噴
射ポンプからの燃料圧力が作用するプランジヤ部
材とを有し、該プランジヤ部材の後端面に作用す
る燃料圧力によりニードル弁のリフトを抑制する
ピストン型の燃料噴射ノズルを備えてなり、上記
燃料噴射ノズルにはそのプランジヤ部材をニード
ル弁のリフト抑制力を低減する方向に押圧する圧
力室が形成され、該圧力室は上記燃料噴射ポンプ
のポンプ室に連通されていることを特徴とするデ
イーゼルエンジンの燃料噴射装置。 A needle valve that is equipped with a fuel injection pump having an injection timing control mechanism that releases fuel in the pump chamber and delays the fuel injection timing when the engine is under low load, and that is lifted and opened by the fuel pressure from the fuel injection pump; A plunger member is provided on the rear end side of the needle valve so as to be slidable coaxially with the needle valve, the tip thereof faces the rear end of the needle valve, and the rear end surface of the plunger member receives fuel pressure from the fuel injection pump. and a piston-type fuel injection nozzle that suppresses the lift of the needle valve by the fuel pressure acting on the rear end surface of the plunger member, and the fuel injection nozzle has a piston-type fuel injection nozzle that applies the lift suppression force of the needle valve to the plunger member. A fuel injection device for a diesel engine, characterized in that a pressure chamber is formed that presses in a direction of pressure reduction, and the pressure chamber is communicated with a pump chamber of the fuel injection pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985164780U JPH0526299Y2 (en) | 1985-10-26 | 1985-10-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985164780U JPH0526299Y2 (en) | 1985-10-26 | 1985-10-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6272470U true JPS6272470U (en) | 1987-05-09 |
| JPH0526299Y2 JPH0526299Y2 (en) | 1993-07-02 |
Family
ID=31094212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985164780U Expired - Lifetime JPH0526299Y2 (en) | 1985-10-26 | 1985-10-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0526299Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6312662U (en) * | 1986-03-27 | 1988-01-27 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60169634A (en) * | 1984-02-10 | 1985-09-03 | Mazda Motor Corp | Fuel injecting device for diesel engine |
-
1985
- 1985-10-26 JP JP1985164780U patent/JPH0526299Y2/ja not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60169634A (en) * | 1984-02-10 | 1985-09-03 | Mazda Motor Corp | Fuel injecting device for diesel engine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6312662U (en) * | 1986-03-27 | 1988-01-27 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0526299Y2 (en) | 1993-07-02 |
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