JPS6282361U - - Google Patents
Info
- Publication number
- JPS6282361U JPS6282361U JP17442285U JP17442285U JPS6282361U JP S6282361 U JPS6282361 U JP S6282361U JP 17442285 U JP17442285 U JP 17442285U JP 17442285 U JP17442285 U JP 17442285U JP S6282361 U JPS6282361 U JP S6282361U
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- fuel injection
- nozzle hole
- needle valve
- diameter
- 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 6
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 238000002485 combustion reaction Methods 0.000 claims description 2
Landscapes
- Fuel-Injection Apparatus (AREA)
Description
第１図はニードルバルブの小、中リフト時にお
けるデイーゼルエンジンの要部断面側面図、第２
図はニードルバルブの高リフト時におけるデイー
ゼルエンジンの要部断面側面図、第３図はニード
ルバルブの小リフト時における要部断面図、第４
図は第３図の―線断面図、第５図はニードル
バルブの高リフト時における要部断面図である。
尚図面中１はシリンダヘツド、３はシリンダブ
ロツク、５はピストン、７は渦流室、９は主燃焼
室、１１は燃料噴射ノズル、１３はグロープラグ
、２３はノズルボデイ、２５はニードルバルブ、
２７は噴孔、２９は切欠き溝である。
Figure 1 is a cross-sectional side view of the main parts of a diesel engine when the needle valve is at a small or medium lift.
The figure is a cross-sectional side view of the main parts of a diesel engine when the needle valve has a high lift. Figure 3 is a cross-sectional view of the main parts when the needle valve is small lift.
The figure is a sectional view taken along the line -- in FIG. 3, and FIG. 5 is a sectional view of the main part of the needle valve when the lift is high. In the drawing, 1 is a cylinder head, 3 is a cylinder block, 5 is a piston, 7 is a swirl chamber, 9 is a main combustion chamber, 11 is a fuel injection nozzle, 13 is a glow plug, 23 is a nozzle body, 25 is a needle valve,
27 is a nozzle hole, and 29 is a notch groove.
Claims (1)
ませて配設されるデイーゼルエンジンのスロツト
ル型燃料噴射ノズルにおいて、 前記燃料噴射ノズルのノズルボデイの噴孔を、
前記連絡路の背面側に位置する渦流室の奥部に向
けて形成し、 且つノズルボデイにおける噴孔の外端側に前記
連絡路に臨ませて切欠き溝を形成し、 ノズルボデイの噴孔内を軸方向動するニードル
バルブのピン部に、噴孔径よりも小径で噴孔内に
環状の間隙を画成し、ニードルバルブの小、中リ
フト時に前記環状の間隙を介して燃料噴射を行な
わしめる小径部を形成すると共に、 前記ピン部における小径部の先端に、前記小径
部よりも大径でニードルバルブの高リフト時に前
記環状の間隙を絞り前記切欠き溝から燃料噴射を
行なわしめる大径部を形成したことを特徴とする
デイーゼルエンジンのスロツトル型燃料噴射ノズ
ル。[Scope of Utility Model Registration Claim] In a throttle-type fuel injection nozzle for a diesel engine that is disposed facing a swirl chamber that communicates with the main combustion chamber via a communication passage, the nozzle hole of the nozzle body of the fuel injection nozzle is
A cutout groove is formed toward the inner part of the swirl chamber located on the back side of the communication passage, and a notch groove is formed facing the communication passage on the outer end side of the nozzle hole in the nozzle body, so that the inside of the nozzle hole of the nozzle body is formed. A pin part of a needle valve that moves in the axial direction defines an annular gap in the nozzle hole with a diameter smaller than the nozzle hole diameter, and fuel injection is performed through the annular gap when the needle valve has a small or medium lift. At the same time, at the tip of the small-diameter portion of the pin portion, a large-diameter portion having a diameter larger than the small-diameter portion and which narrows the annular gap during high lift of the needle valve and injects fuel from the notch groove. A throttle-type fuel injection nozzle for a diesel engine characterized by the following:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17442285U JPS6282361U (en) | 1985-11-13 | 1985-11-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17442285U JPS6282361U (en) | 1985-11-13 | 1985-11-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6282361U true JPS6282361U (en) | 1987-05-26 |
Family
ID=31112790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17442285U Pending JPS6282361U (en) | 1985-11-13 | 1985-11-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6282361U (en) |
-
1985
- 1985-11-13 JP JP17442285U patent/JPS6282361U/ja active Pending
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