JPS6373572U - - Google Patents
Info
- Publication number
- JPS6373572U JPS6373572U JP16659486U JP16659486U JPS6373572U JP S6373572 U JPS6373572 U JP S6373572U JP 16659486 U JP16659486 U JP 16659486U JP 16659486 U JP16659486 U JP 16659486U JP S6373572 U JPS6373572 U JP S6373572U
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- needle
- receiving surface
- fuel
- lift amount
- 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 16
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Fuel-Injection Apparatus (AREA)
Description
第１図は本考案の第１実施例に係る燃料噴射弁
の部分縦断面図、第２図は第１図の装置の燃料圧
力とニードルリフト量との関係図、第３図は本考
案の第２実施例に係る燃料噴射弁の部分縦断面図
、第４図は従来の燃料噴射弁の部分縦断面図、第
５図は第４図の装置のニードルリフト量と噴射流
量との関係図、第６図は第４図の装置の燃料圧力
とニードルリフト量との関係図、である。
１１，３３……燃料噴射弁、１２……噴孔、１
３，３１……ニードル、１７……油溜り、１８…
…高圧燃料通路、１９……第１の受圧面、２０…
…第２の受圧面、２２……プレツシヤチヤンバ、
２３……高圧ポート、２４，２６，３２……燃料
リーク通路、２５……低圧室、３４……オーバフ
ロー通路。
Fig. 1 is a partial longitudinal cross-sectional view of a fuel injection valve according to the first embodiment of the present invention, Fig. 2 is a relationship diagram between fuel pressure and needle lift amount of the device of Fig. 1, and Fig. 3 is a diagram of the relationship between fuel pressure and needle lift amount of the device of Fig. 1. FIG. 4 is a partial longitudinal sectional view of a fuel injection valve according to the second embodiment, FIG. 4 is a partial longitudinal sectional view of a conventional fuel injection valve, and FIG. 5 is a diagram of the relationship between the needle lift amount and injection flow rate of the device shown in FIG. 4. , FIG. 6 is a diagram showing the relationship between fuel pressure and needle lift amount of the device shown in FIG. 4. 11, 33...fuel injection valve, 12...nozzle hole, 1
3,31...Needle, 17...Oil pool, 18...
...High pressure fuel passage, 19...First pressure receiving surface, 20...
... second pressure receiving surface, 22 ... pressure chamber,
23... High pressure port, 24, 26, 32... Fuel leak passage, 25... Low pressure chamber, 34... Overflow passage.
Claims (1)
ードルの受圧面に燃料圧力を作用させることによ
りリフトさせ、該リフトにより先端部の噴孔を開
いて燃料を噴射する燃料噴射弁において、前記ニ
ードルの受圧面を、ニードルのリフト量にかかわ
らず燃料圧力が作用可能な第１の受圧面と、ニー
ドルのリフト量が一定量以上になつたときのみに
燃料圧力が作用可能な第２の受圧面から構成する
とともに、前記ノズルボデーに、ニードルのリフ
ト量が一定量以上になつたときのみ開口して前記
第２の受圧面へと燃料圧力を導入するポートを設
けたことを特徴とする燃料噴射弁。 A fuel injection valve that lifts a needle provided in a nozzle body by applying fuel pressure to a pressure-receiving surface of the needle, and opens a nozzle hole at a tip portion by the lift to inject fuel, the pressure-receiving surface of the needle consists of a first pressure-receiving surface on which fuel pressure can be applied regardless of the lift amount of the needle, and a second pressure-receiving surface on which fuel pressure can be applied only when the needle lift amount exceeds a certain amount. The fuel injection valve is further characterized in that the nozzle body is provided with a port that opens only when the lift amount of the needle reaches a certain amount or more and introduces fuel pressure to the second pressure receiving surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16659486U JPH0444841Y2 (en) | 1986-10-31 | 1986-10-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16659486U JPH0444841Y2 (en) | 1986-10-31 | 1986-10-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6373572U true JPS6373572U (en) | 1988-05-17 |
| JPH0444841Y2 JPH0444841Y2 (en) | 1992-10-22 |
Family
ID=31097723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16659486U Expired JPH0444841Y2 (en) | 1986-10-31 | 1986-10-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0444841Y2 (en) |
-
1986
- 1986-10-31 JP JP16659486U patent/JPH0444841Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0444841Y2 (en) | 1992-10-22 |
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