JPH02139359U - - Google Patents
Info
- Publication number
- JPH02139359U JPH02139359U JP4888189U JP4888189U JPH02139359U JP H02139359 U JPH02139359 U JP H02139359U JP 4888189 U JP4888189 U JP 4888189U JP 4888189 U JP4888189 U JP 4888189U JP H02139359 U JPH02139359 U JP H02139359U
- Authority
- JP
- Japan
- Prior art keywords
- cylinder hole
- diameter cylinder
- piston part
- diameter piston
- small
- 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 3
- 239000007924 injection Substances 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims 3
- 239000010720 hydraulic oil Substances 0.000 claims 1
- 230000002093 peripheral effect Effects 0.000 claims 1
- 238000000638 solvent extraction Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Fuel-Injection Apparatus (AREA)
Description
第１図ないし第３図はこの考案の一実施例を示
すもので、第１図はその該略構成を示す断面図、
第２図は大径ピストン部がストツパ部に突き当た
つた状態を示す図、第３図は第１図の一部省略
矢視図、第４図はこの考案の他の実施例を示す一
部省略断面図、第５図は従来の増圧式燃料噴射装
置の一例の概略構成を示す断面図である。
３…装置本体、４…プランジヤ、３１…大径シ
リンダ孔部、３１ａ…上室（空間）、３１ｂ…下
室（空間）、３２…小径シリンダ孔部、３３…燃
料加圧室、３４…段差面（ストツパ部）、３５…
流通孔（流通口）、３６…環状突出部（ストツパ
部）、４１…大径ピストン部、４２…小径ピスト
ン部。
1 to 3 show an embodiment of this invention, and FIG. 1 is a cross-sectional view showing the schematic structure thereof;
Fig. 2 is a diagram showing a state in which the large-diameter piston part abuts against the stopper part, Fig. 3 is a partially omitted view in the direction of the arrows in Fig. 1, and Fig. 4 is a diagram showing another embodiment of this invention. FIG. 5 is a cross-sectional view showing a schematic configuration of an example of a conventional pressure boost type fuel injection device. 3... Device body, 4... Plunger, 31... Large diameter cylinder hole, 31a... Upper chamber (space), 31b... Lower chamber (space), 32... Small diameter cylinder hole, 33... Fuel pressurizing chamber, 34... Level difference Surface (stopper part), 35...
Flow hole (flow port), 36... Annular protrusion (stopper part), 41... Large diameter piston part, 42... Small diameter piston part.
Claims (1)
および燃料加圧室が順次連設された装置本体と、
前記大径シリンダ孔部に摺動自在に設けられた大
径ピストン部およびこの大径ピストン部に一体に
設けられ、前記小径シリンダ孔部に摺動自在に設
けられた小径ピストン部からなるプランジヤとを
備え、前記大径ピストン部によつて区画される前
記大径シリンダ孔部内の２つの空間のうち、前記
小径シリンダ孔部側と逆側の空間内に作動油を導
入して前記大径ピストン部を前記大径シリンダ孔
に設けられたストツパ部に突き当たるまで移動さ
せることにより、前記燃料加圧室内に導入された
燃料を前記小径ピストン部によつて加圧するよう
にした増圧式燃料噴射装置において、前記大径ピ
ストン部によつて区画される２つの空間のうちの
前記小径シリンダ孔部側の空間に非圧縮性流体を
充満させるとともに、この非圧縮性流体によつて
充満された空間を区画する前記大径シリンダ孔部
の内周面に非圧縮性流体が流出入する流通口を開
口させ、しかもこの流通口の開口部を前記ストツ
パ部に突き当たつて停止した大径ピストン部の外
周面の下端部によつて遮蔽されるように位置させ
たことを特徴とする増圧式燃料噴射装置。 A device main body in which a large-diameter cylinder hole, a small-diameter cylinder hole, and a fuel pressurizing chamber are successively arranged;
a plunger comprising a large diameter piston part slidably provided in the large diameter cylinder hole and a small diameter piston part integrally provided with the large diameter piston part and slidably provided in the small diameter cylinder hole; Of the two spaces in the large-diameter cylinder hole partitioned by the large-diameter piston part, hydraulic oil is introduced into a space on the opposite side to the small-diameter cylinder hole side, and the large-diameter piston In the pressure increase type fuel injection device, the fuel introduced into the fuel pressurizing chamber is pressurized by the small diameter piston part by moving the part until it abuts a stopper part provided in the large diameter cylinder hole. , filling the space on the small diameter cylinder hole side of the two spaces partitioned by the large diameter piston part with an incompressible fluid, and partitioning the space filled with the incompressible fluid. A communication port through which an incompressible fluid flows in and out is opened on the inner peripheral surface of the large diameter cylinder hole, and the outer circumference of the large diameter piston part is stopped when the opening of the communication port abuts against the stopper part. 1. A pressure boosting fuel injection device, characterized in that it is positioned so as to be shielded by the lower end of the surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4888189U JPH02139359U (en) | 1989-04-27 | 1989-04-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4888189U JPH02139359U (en) | 1989-04-27 | 1989-04-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02139359U true JPH02139359U (en) | 1990-11-21 |
Family
ID=31566085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4888189U Pending JPH02139359U (en) | 1989-04-27 | 1989-04-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02139359U (en) |
-
1989
- 1989-04-27 JP JP4888189U patent/JPH02139359U/ja active Pending
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