JPS648569U - - Google Patents
Info
- Publication number
- JPS648569U JPS648569U JP10328787U JP10328787U JPS648569U JP S648569 U JPS648569 U JP S648569U JP 10328787 U JP10328787 U JP 10328787U JP 10328787 U JP10328787 U JP 10328787U JP S648569 U JPS648569 U JP S648569U
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- diameter
- small
- cylinder
- pressurizing chamber
- 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.)
- Granted
Links
- 239000000446 fuel Substances 0.000 claims description 26
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Fuel-Injection Apparatus (AREA)
Description
第１図、第２図および第３図はそれぞれこの考
案の一実施例を示す概略構成図、第４図は第３図
に示す実施例における燃料加圧装置の燃料噴射終
了時の状態を示す図、第５図は従来の油圧式燃料
噴射装置の一例を示す概略構成図である。
４……シリンダ、５……プランジヤ、６……燃
料輸送管（燃料輸送路）、７……燃料噴射ノズル
、８……燃料戻し管（燃料戻し通路）、４１……
大径シリンダ部、４２……小径シリンダ部、４３
……燃料加圧室、４３ａ……大径加圧部、４３ｂ
……小径加圧部、５１……大径部、５２……小径
部、５３……連通孔（連通路）、５４……環状溝
（連通路）。
FIGS. 1, 2, and 3 are schematic configuration diagrams showing one embodiment of this invention, and FIG. 4 shows the state of the fuel pressurizing device at the end of fuel injection in the embodiment shown in FIG. 3. 5 are schematic configuration diagrams showing an example of a conventional hydraulic fuel injection device. 4... Cylinder, 5... Plunger, 6... Fuel transport pipe (fuel transport path), 7... Fuel injection nozzle, 8... Fuel return pipe (fuel return passage), 41...
Large diameter cylinder part, 42...Small diameter cylinder part, 43
...Fuel pressurization chamber, 43a...Large diameter pressurization section, 43b
. . . Small diameter pressurizing portion, 51 . . . Large diameter portion, 52 . . . Small diameter portion, 53 .
Claims (1)
リンダ部および燃料加圧室を有するシリンダと、
このシリンダの大径シリンダ部と小径シリンダ部
とに大径部と小径部とがそれぞれ摺動自在に設け
られたプランジヤとを備え、前記大径シリンダ部
に圧油を供給してプランジヤを大径シリンダ部側
から小径シリンダ部側へ移動させることにより、
小径シリンダ部によつて前記燃料加圧室内の燃料
を加圧して燃料噴射ノズルに供給し、前記プラン
ジヤが所定距離加圧移動した際に前記燃料加圧室
内部の燃料を燃料加圧室の外部に設けられた燃料
戻し通路を介して燃料加圧室の外部に戻すように
した油圧式燃料噴射装置において、前記燃料加圧
室の小径シリンダ部に続く部分に小径シリンダ部
より大径の大径加圧部と前記小径シリンダ部と同
径の小径加圧部とを順次形成するとともに、大径
加圧部に前記燃料噴射ノズルに燃料を圧送するた
めの燃料輸送路を接続し、前記小径シリンダ部に
一端が前記燃料戻し通路に接続され、他端が前記
小径部の外周面に開放された連通路を形成し、こ
の連通路の開放部から前記小径部の先端面までの
距離を前記大径加圧部の長さよりも短く設定した
ことを特徴とする油圧式燃料噴射装置。 a cylinder having a large diameter cylinder part, a small diameter cylinder part and a fuel pressurizing chamber formed in sequence therein;
The large diameter cylinder part and the small diameter cylinder part of this cylinder are provided with a plunger in which the large diameter part and the small diameter part are respectively slidably provided, and pressurized oil is supplied to the large diameter cylinder part to cause the plunger to have a large diameter. By moving from the cylinder side to the small diameter cylinder side,
The small-diameter cylinder section pressurizes the fuel in the fuel pressurizing chamber and supplies it to the fuel injection nozzle, and when the plunger moves a predetermined distance under pressure, the fuel inside the fuel pressurizing chamber is transferred to the outside of the fuel pressurizing chamber. In a hydraulic fuel injection device in which fuel is returned to the outside of a pressurizing chamber through a fuel return passage provided in the fuel pressurizing chamber, a large diameter cylinder having a larger diameter than the small diameter cylinder portion is provided in a portion of the fuel pressurizing chamber that follows the small diameter cylinder portion. A pressurizing part and a small-diameter pressurizing part having the same diameter as the small-diameter cylinder part are sequentially formed, and a fuel transport path for pressure-feeding fuel to the fuel injection nozzle is connected to the large-diameter pressurizing part. A communication passage is formed in which one end is connected to the fuel return passage and the other end is open to the outer peripheral surface of the small diameter part, and the distance from the open part of the communication passage to the distal end surface of the small diameter part is defined by the large diameter part. A hydraulic fuel injection device characterized in that the diameter is set shorter than the length of the pressurizing part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987103287U JPH0455251Y2 (en) | 1987-07-07 | 1987-07-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987103287U JPH0455251Y2 (en) | 1987-07-07 | 1987-07-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS648569U true JPS648569U (en) | 1989-01-18 |
| JPH0455251Y2 JPH0455251Y2 (en) | 1992-12-25 |
Family
ID=31333979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987103287U Expired JPH0455251Y2 (en) | 1987-07-07 | 1987-07-07 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0455251Y2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1243787B1 (en) * | 2001-03-23 | 2006-07-12 | Toyota Jidosha Kabushiki Kaisha | Common rail fuel injection apparatus and control method thereof |
| EP1304462B1 (en) * | 2001-10-22 | 2006-12-13 | Toyota Jidosha Kabushiki Kaisha | Control apparatus of actuator |
| JP2007154843A (en) * | 2005-12-08 | 2007-06-21 | Toyota Motor Corp | Fuel injection device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS618211U (en) * | 1984-06-19 | 1986-01-18 | アサヒ住宅株式会社 | Room using air permeable baseboards and architraves |
-
1987
- 1987-07-07 JP JP1987103287U patent/JPH0455251Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS618211U (en) * | 1984-06-19 | 1986-01-18 | アサヒ住宅株式会社 | Room using air permeable baseboards and architraves |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1243787B1 (en) * | 2001-03-23 | 2006-07-12 | Toyota Jidosha Kabushiki Kaisha | Common rail fuel injection apparatus and control method thereof |
| EP1304462B1 (en) * | 2001-10-22 | 2006-12-13 | Toyota Jidosha Kabushiki Kaisha | Control apparatus of actuator |
| JP2007154843A (en) * | 2005-12-08 | 2007-06-21 | Toyota Motor Corp | Fuel injection device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0455251Y2 (en) | 1992-12-25 |
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