JPS6293161U - - Google Patents
Info
- Publication number
- JPS6293161U JPS6293161U JP18450285U JP18450285U JPS6293161U JP S6293161 U JPS6293161 U JP S6293161U JP 18450285 U JP18450285 U JP 18450285U JP 18450285 U JP18450285 U JP 18450285U JP S6293161 U JPS6293161 U JP S6293161U
- Authority
- JP
- Japan
- Prior art keywords
- pressure chamber
- diameter
- diameter piston
- small
- low
- 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 7
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Fuel-Injection Apparatus (AREA)
Description
第１図は本考案の一実施例の構成を示す縦断面
図。第２図および第３図は本考案の一実施例の作
用の説明に供するための圧力線図および噴射率線
図。第４図は本考案の他の実施例の構成を示す縦
断面図。
Ａ……燃料噴射弁本体、Ｂ……増圧装置、Ｃ…
…燃料噴射ポンプ、２Ｃ……油溜室、６……高圧
室、１１……大径ピストン、１２……小径ピスト
ン、１３……低圧室、１８……環状溝、１９……
通路。
FIG. 1 is a longitudinal sectional view showing the structure of an embodiment of the present invention. 2 and 3 are pressure diagrams and injection rate diagrams for explaining the operation of an embodiment of the present invention. FIG. 4 is a longitudinal sectional view showing the structure of another embodiment of the present invention. A... Fuel injection valve body, B... Pressure booster, C...
...Fuel injection pump, 2C... Oil reservoir chamber, 6... High pressure chamber, 11... Large diameter piston, 12... Small diameter piston, 13... Low pressure chamber, 18... Annular groove, 19...
aisle.
Claims (1)
室を形成した大径ピストンと、該大径ピストンの
他方側に当接させた小径ピストンと、前記大径お
よび小径ピストンを前記低圧室側に付勢する戻し
ばねとを内蔵し、前記小径ピストンの先端部側に
高圧室を形成し、前記大径ピストンに低圧室と前
記環状溝を連通する第１の通路を形成し、前記低
圧室に燃料噴射ポンプからの圧送燃料を供給し、
前記高圧室を燃料噴射弁本体の油溜室に連通し、
前記大径ピストンが嵌装されているシリンダに開
口して前記高圧室に連通する第２の通路を形成す
るとともに、前記大径および小径ピストンの前記
高圧室側への移動によつて前記高圧室内の燃料を
加圧しかつ前記移動の途中において前記環状溝に
前記第２の通路の開口部が対向するようにした増
圧装置を備えたことを特徴とする燃料噴射弁。 a large-diameter piston having an annular groove on its outer periphery in the center and a low-pressure chamber on one side; a small-diameter piston in contact with the other side of the large-diameter piston; and a small-diameter piston with the large-diameter and small-diameter pistons on the low-pressure chamber side A high pressure chamber is formed at the tip end side of the small diameter piston, a first passage communicating the low pressure chamber and the annular groove is formed in the large diameter piston, and the low pressure chamber Supply pressurized fuel from the fuel injection pump to
communicating the high pressure chamber with an oil reservoir chamber of the fuel injection valve body;
A second passage is opened in the cylinder in which the large-diameter piston is fitted and communicates with the high-pressure chamber, and the movement of the large-diameter and small-diameter pistons toward the high-pressure chamber causes the high-pressure chamber to be opened. 1. A fuel injection valve comprising: a pressure increase device for pressurizing fuel and having an opening of the second passage facing the annular groove during the movement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18450285U JPS6293161U (en) | 1985-12-02 | 1985-12-02 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18450285U JPS6293161U (en) | 1985-12-02 | 1985-12-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6293161U true JPS6293161U (en) | 1987-06-13 |
Family
ID=31132238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18450285U Pending JPS6293161U (en) | 1985-12-02 | 1985-12-02 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6293161U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5783658A (en) * | 1980-11-14 | 1982-05-25 | Nippon Denso Co Ltd | Fuel injection device |
| JPS58214664A (en) * | 1982-06-07 | 1983-12-13 | Nissan Motor Co Ltd | Fuel injection device of internal-combustion engine |
-
1985
- 1985-12-02 JP JP18450285U patent/JPS6293161U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5783658A (en) * | 1980-11-14 | 1982-05-25 | Nippon Denso Co Ltd | Fuel injection device |
| JPS58214664A (en) * | 1982-06-07 | 1983-12-13 | Nissan Motor Co Ltd | Fuel injection device of internal-combustion engine |
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