JPS6392074U - - Google Patents
Info
- Publication number
- JPS6392074U JPS6392074U JP18843986U JP18843986U JPS6392074U JP S6392074 U JPS6392074 U JP S6392074U JP 18843986 U JP18843986 U JP 18843986U JP 18843986 U JP18843986 U JP 18843986U JP S6392074 U JPS6392074 U JP S6392074U
- Authority
- JP
- Japan
- Prior art keywords
- injection
- needle valve
- nozzle
- annular groove
- nozzle body
- 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
- 238000002347 injection Methods 0.000 claims description 14
- 239000007924 injection Substances 0.000 claims description 14
- 239000000446 fuel Substances 0.000 claims description 6
- 238000013459 approach Methods 0.000 claims 1
Landscapes
- Fuel-Injection Apparatus (AREA)
Description
第１図は本考案の燃料噴射ノズルを適用したユ
ニツトインジエクタの縦断面図、第２図は本考案
の一実施例に係る燃料噴射ノズルの先端部の断面
図で、第２図はニードル弁のリフトの断面図を示
し、第３図乃至第５図はそれぞれ異なる従来の燃
料噴射ノズルの先端部の断面図で、第５図はニー
ドル弁のリフトの断面図を示したものである。
１，２０……ニードル弁、１ａ，２０ａ……ニ
ードル弁の先端シート面、２，１８……ノズルボ
デイ、２ｂ，１８ｂ……ノズルボデイの底部シー
ト面、２ｄ，１８ｃ……先端面、３，１９……噴
孔、４，２０ｂ……環状溝。
Fig. 1 is a longitudinal cross-sectional view of a unit injector to which the fuel injection nozzle of the present invention is applied, Fig. 2 is a cross-sectional view of the tip of the fuel injection nozzle according to an embodiment of the present invention, and Fig. 2 is a needle valve. 3 to 5 are sectional views of the tips of different conventional fuel injection nozzles, and FIG. 5 is a sectional view of the lift of a needle valve. 1, 20... Needle valve, 1a, 20a... Tip seat surface of needle valve, 2, 18... Nozzle body, 2b, 18b... Bottom seat surface of nozzle body, 2d, 18c... Tip surface, 3, 19... ... Nozzle hole, 4, 20b ... Annular groove.
Claims (1)
に複数個穿設したノズルボデイと、該ノズルボデ
イ内に設けられ且つ先端シート面が前記ノズルボ
デイの底部シート面に接離することにより燃料噴
射をコントロールするニードル弁とを備え、該ニ
ードル弁の先端シート面に各噴孔からの噴射圧力
を均一化するための環状溝を設けて成る燃料噴射
ノズルにおいて、前記ニードル弁の先端シート面
が前記ノズルボデイの底部シート面に密着時前記
環状溝は前記各噴孔と全くオーバラツプせず、前
記ニードル弁が初期噴射リフト時前記環状溝は前
記各噴孔と一部オーバラツプし、前記ニードル弁
が前記初期噴射リフト時に引き続く主噴射リフト
時前記環状溝は前記各噴孔と全面的にオーバラツ
プする如く構成したことを特徴とする燃料噴射ノ
ズル。 A nozzle body in which a plurality of nozzle holes are formed in a distal end surface of which the inner end opens into a bottom sheet surface, and a nozzle body is provided in the nozzle body, and the distal end sheet surface approaches and separates from the bottom sheet surface of the nozzle body, thereby injecting fuel. In the fuel injection nozzle, the needle valve has an annular groove for equalizing the injection pressure from each nozzle hole on the distal end seat surface of the needle valve, the distal end seat surface of the needle valve is connected to the nozzle body. When the needle valve is in close contact with the bottom seat surface of the injection hole, the annular groove does not overlap with the injection holes at all, and when the needle valve is in initial injection lift, the annular groove partially overlaps with each injection hole, and when the needle valve is in initial injection lift, the annular groove partially overlaps with the injection holes. A fuel injection nozzle characterized in that the annular groove is configured to completely overlap each of the injection holes during a main injection lift subsequent to a lift.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986188439U JPH0343413Y2 (en) | 1986-12-05 | 1986-12-05 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986188439U JPH0343413Y2 (en) | 1986-12-05 | 1986-12-05 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6392074U true JPS6392074U (en) | 1988-06-14 |
| JPH0343413Y2 JPH0343413Y2 (en) | 1991-09-11 |
Family
ID=31139806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986188439U Expired JPH0343413Y2 (en) | 1986-12-05 | 1986-12-05 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0343413Y2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH094543A (en) * | 1995-06-16 | 1997-01-07 | Nissan Diesel Motor Co Ltd | Fuel injection nozzle |
| JP2003508684A (en) * | 1999-09-04 | 2003-03-04 | ローベルト 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 | Injection nozzle for internal combustion engine with ring groove in nozzle needle |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58122779U (en) * | 1982-02-15 | 1983-08-20 | 日産自動車株式会社 | Internal combustion engine fuel injection nozzle |
-
1986
- 1986-12-05 JP JP1986188439U patent/JPH0343413Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58122779U (en) * | 1982-02-15 | 1983-08-20 | 日産自動車株式会社 | Internal combustion engine fuel injection nozzle |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH094543A (en) * | 1995-06-16 | 1997-01-07 | Nissan Diesel Motor Co Ltd | Fuel injection nozzle |
| JP2003508684A (en) * | 1999-09-04 | 2003-03-04 | ローベルト 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 | Injection nozzle for internal combustion engine with ring groove in nozzle needle |
| JP4709451B2 (en) * | 1999-09-04 | 2011-06-22 | ローベルト 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 | Injection nozzle for internal combustion engines with a ring groove in the nozzle needle |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0343413Y2 (en) | 1991-09-11 |