JPH01141366U - - Google Patents
Info
- Publication number
- JPH01141366U JPH01141366U JP3796388U JP3796388U JPH01141366U JP H01141366 U JPH01141366 U JP H01141366U JP 3796388 U JP3796388 U JP 3796388U JP 3796388 U JP3796388 U JP 3796388U JP H01141366 U JPH01141366 U JP H01141366U
- Authority
- JP
- Japan
- Prior art keywords
- needle
- injection hole
- amount
- opened
- lifted
- 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 8
- 239000007924 injection Substances 0.000 claims description 8
- 239000000446 fuel Substances 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Fuel-Injection Apparatus (AREA)
Description
第１図はこの考案の実施例を示す断面図、第２
図は同じく要部断面図、第３図はニードルのプリ
リフト域と全リフト域を説明する特性図、第４図
ａは低速低負荷時の、第４図ｂは高速高負荷時の
噴射圧特性図、第５図は第４図ｂに対応する噴射
率特性図である。
１……ノズル、３……ニードル、９……テーパ
部、１０……スロツトル部、２０……副噴孔、３
０……主噴孔。
Figure 1 is a sectional view showing an embodiment of this invention, Figure 2 is a sectional view showing an embodiment of this invention.
The figure is also a sectional view of the main part, Figure 3 is a characteristic diagram explaining the pre-lift area and total lift area of the needle, Figure 4 a is the injection pressure characteristic at low speed and low load, and Figure 4 b is the injection pressure characteristic at high speed and high load. 5 is an injection rate characteristic diagram corresponding to FIG. 4b. 1... Nozzle, 3... Needle, 9... Taper part, 10... Throttle part, 20... Sub-nozzle hole, 3
0...Main nozzle hole.
Claims (1)
を備え、ニードルのプリリフトにてニードルのテ
ーパ部により開成される副噴孔と、ニードルの全
リフト時にのみニードル先端のラツパ形のスロツ
トル部により環状に開成される主噴孔を設け、ス
ロツトル部の主噴孔とのオーバラツプ量をニード
ルのプリリフト量より大きく、かつ全リフト量よ
り小さく設定したことを特徴とする燃料噴射弁。 Equipped with a needle that lifts in two stages depending on the fuel pressure, the secondary injection hole is opened by the tapered part of the needle when the needle is pre-lifted, and the auxiliary injection hole is opened in an annular shape by the rattle-shaped throttle part at the tip of the needle only when the needle is fully lifted. 1. A fuel injection valve characterized in that a main injection hole is provided in the throttle section, and the amount of overlap with the main injection hole in the throttle part is set to be larger than the prelift amount of the needle and smaller than the total lift amount.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3796388U JPH01141366U (en) | 1988-03-23 | 1988-03-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3796388U JPH01141366U (en) | 1988-03-23 | 1988-03-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01141366U true JPH01141366U (en) | 1989-09-28 |
Family
ID=31264534
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3796388U Pending JPH01141366U (en) | 1988-03-23 | 1988-03-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01141366U (en) |
-
1988
- 1988-03-23 JP JP3796388U patent/JPH01141366U/ja active Pending
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