JPH01142540U - - Google Patents
Info
- Publication number
- JPH01142540U JPH01142540U JP3877788U JP3877788U JPH01142540U JP H01142540 U JPH01142540 U JP H01142540U JP 3877788 U JP3877788 U JP 3877788U JP 3877788 U JP3877788 U JP 3877788U JP H01142540 U JPH01142540 U JP H01142540U
- Authority
- JP
- Japan
- Prior art keywords
- negative pressure
- load
- correction spring
- diaphragm
- load correction
- 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
- 239000000446 fuel Substances 0.000 claims description 9
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 230000002265 prevention Effects 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims 2
- 238000005192 partition Methods 0.000 claims 2
- 238000006073 displacement reaction Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Fuel-Injection Apparatus (AREA)
Description
第１図は本考案に係る燃料噴射装置における燃
料漏れ防止機構の概略断面図、第２図は従来装置
の概略断面図、第３図ａ，ｂ及びｃは夫々従来装
置の特性を示す図、第４図は第２図の従来装置を
改良した装置の概略断面図、第５図ａ及びｂは夫
々改良装置の特性を示す図である。
２…スロツトルバルブ、４…燃料制御部、６…
負圧室、８…負圧ダイアフラム、１０ａ…噴射口
、１２…燃料ダイアフラム、１５ａ…バルブ、１
７，１７′…補正用スプリング、１８…調圧レギ
ユレータ、１９…第二負圧室、２０…調圧ダイア
フラム、２２…調圧部材。
FIG. 1 is a schematic sectional view of a fuel leak prevention mechanism in a fuel injection device according to the present invention, FIG. 2 is a schematic sectional view of a conventional device, and FIGS. 3 a, b, and c are diagrams showing characteristics of the conventional device, respectively. FIG. 4 is a schematic sectional view of a device improved from the conventional device shown in FIG. 2, and FIGS. 5a and 5b are diagrams showing the characteristics of the improved device, respectively. 2...throttle valve, 4...fuel control section, 6...
Negative pressure chamber, 8...Negative pressure diaphragm, 10a...Injection port, 12...Fuel diaphragm, 15a...Valve, 1
7, 17'... Correction spring, 18... Pressure regulating regulator, 19... Second negative pressure chamber, 20... Pressure regulating diaphragm, 22... Pressure regulating member.
Claims (1)
を仕切る負圧ダイアフラムと、該負圧ダイアフラ
ムの変位に応じて燃料の噴射口を開閉せしめるバ
ルブを含む燃料制御部を備えた燃料噴射装置にお
いて、 前記負圧ダイアフラムに設けられた荷重補正用
スプリングと、 該荷重補正用スプリングの荷重をマニホールド
負圧の有無によつて増減せしめる調圧手段と、 を備えていて、エンジン停止時等には前記荷重
補正用スプリングの荷重を小さくして前記噴射口
をバルブによつて開弁せしめ、エンジン作動時に
は前記荷重補正用スプリングの荷重を大きくする
ようにしたことを特徴とする燃料漏れ防止機構。 (2) 前記調圧手段が、マニホールド負圧を導入
し得る第二負圧室と、該第二負圧室を仕切る調圧
ダイアフラムとを有していて、該調圧ダイアフラ
ムの変位によつて前記荷重補正用スプリングの荷
重を増減せしめるようにしたことを特徴とする実
用新案登録請求の範囲(1)に記載の燃料漏れ防止
機構。[Scope of Claim for Utility Model Registration] (1) A negative pressure diaphragm that partitions a negative pressure chamber into which negative pressure according to the air flow rate is introduced, and a valve that opens and closes a fuel injection port according to the displacement of the negative pressure diaphragm. A fuel injection device equipped with a fuel control unit comprising: a load correction spring provided on the negative pressure diaphragm; and a pressure regulating means for increasing or decreasing the load of the load correction spring depending on the presence or absence of manifold negative pressure. The injection port is opened by a valve by reducing the load of the load correction spring when the engine is stopped, and the load of the load correction spring is increased when the engine is running. A fuel leak prevention mechanism featuring: (2) The pressure regulating means has a second negative pressure chamber into which manifold negative pressure can be introduced, and a pressure regulating diaphragm that partitions the second negative pressure chamber, and the pressure regulating means The fuel leak prevention mechanism according to claim (1), which is a registered utility model, characterized in that the load of the load correction spring is increased or decreased.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3877788U JPH01142540U (en) | 1988-03-24 | 1988-03-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3877788U JPH01142540U (en) | 1988-03-24 | 1988-03-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01142540U true JPH01142540U (en) | 1989-09-29 |
Family
ID=31265316
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3877788U Pending JPH01142540U (en) | 1988-03-24 | 1988-03-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01142540U (en) |
-
1988
- 1988-03-24 JP JP3877788U patent/JPH01142540U/ja active Pending
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