JPH01179173U - - Google Patents
Info
- Publication number
- JPH01179173U JPH01179173U JP7744288U JP7744288U JPH01179173U JP H01179173 U JPH01179173 U JP H01179173U JP 7744288 U JP7744288 U JP 7744288U JP 7744288 U JP7744288 U JP 7744288U JP H01179173 U JPH01179173 U JP H01179173U
- Authority
- JP
- Japan
- Prior art keywords
- pump chamber
- plunger
- cylinder
- port
- fuel
- 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 8
- 238000002347 injection Methods 0.000 claims description 8
- 239000007924 injection Substances 0.000 claims description 8
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Fuel-Injection Apparatus (AREA)
Description
第１図は本考案の一実施例を示すデイーゼルエ
ンジン用燃料噴射装置の要部を縦断した全体図、
第２図はその要部の拡大縦断面図で、プランジヤ
によるポンプ室の加圧初期の状態を示す、第３図
は本考案の別の実施例を示す、第２図と同様な断
面図、第４図は燃料噴射特性線図で、線Ａは本考
案装置の特性を、また線Ｂは従来装置の特性をそ
れぞれ示す。
１……燃料供給源としての燃料ポンプ、１１…
…噴射ポンプ、１２……噴射ノズル、１４……シ
リンダ、１５……ポンプ室、１６……プランジヤ
、１６ａ……逃し部としてのテーパ部、４２……
逃し部としての傾斜溝。
FIG. 1 is an overall cross-sectional view of the main parts of a diesel engine fuel injection device showing an embodiment of the present invention;
FIG. 2 is an enlarged longitudinal cross-sectional view of the main part, showing the initial state of pressurization of the pump chamber by the plunger; FIG. 3 is a cross-sectional view similar to FIG. 2, showing another embodiment of the present invention; FIG. 4 is a fuel injection characteristic diagram, in which line A shows the characteristics of the device of the present invention, and line B shows the characteristics of the conventional device. 1... Fuel pump as a fuel supply source, 11...
... Injection pump, 12 ... Injection nozzle, 14 ... Cylinder, 15 ... Pump chamber, 16 ... Plunger, 16a ... Tapered part as relief part, 42 ...
Slanted groove as a relief part.
Claims (1)
すべく嵌装され、往復動してポンプ室の加、減圧
を行うプランジヤとから噴射ポンプを構成し、ポ
ンプ室の内壁には燃料供給源に連なるバルブポー
トを、それがプランジヤの往復動により開閉され
るように設け、またポンプ室には、その昇圧によ
り開弁する噴射弁を連通してなる、デイーゼルエ
ンジン用燃料噴射装置において、プランジヤによ
るポンプ室の加圧初期にポンプ室の燃料の一部を
バルブポートへ戻すための逃し部をプランジヤま
たはシリンダに設けたことを特徴とする、デイー
ゼルエンジン用燃料噴射装置。 The injection pump consists of a cylinder and a plunger that is fitted in the cylinder to define a pump chamber and that moves reciprocally to pressurize and depressurize the pump chamber.The inner wall of the pump chamber has a valve connected to the fuel supply source. In a fuel injection device for a diesel engine, a port is provided so that the port is opened and closed by the reciprocating movement of a plunger, and an injection valve that opens when the pressure increases is communicated with the pump chamber. A fuel injection device for a diesel engine, characterized in that a plunger or cylinder is provided with a relief part for returning part of the fuel in a pump chamber to a valve port at the initial stage of pressurization.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7744288U JPH01179173U (en) | 1988-06-10 | 1988-06-10 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7744288U JPH01179173U (en) | 1988-06-10 | 1988-06-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01179173U true JPH01179173U (en) | 1989-12-22 |
Family
ID=31302426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7744288U Pending JPH01179173U (en) | 1988-06-10 | 1988-06-10 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01179173U (en) |
-
1988
- 1988-06-10 JP JP7744288U patent/JPH01179173U/ja active Pending