JPH02124260U - - Google Patents
Info
- Publication number
- JPH02124260U JPH02124260U JP3244789U JP3244789U JPH02124260U JP H02124260 U JPH02124260 U JP H02124260U JP 3244789 U JP3244789 U JP 3244789U JP 3244789 U JP3244789 U JP 3244789U JP H02124260 U JPH02124260 U JP H02124260U
- Authority
- JP
- Japan
- Prior art keywords
- chamber
- accumulation
- fuel
- 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 14
- 238000002347 injection Methods 0.000 claims description 13
- 239000007924 injection Substances 0.000 claims description 13
- 238000009825 accumulation Methods 0.000 claims description 12
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- High-Pressure Fuel Injection Pump Control (AREA)
- Fuel-Injection Apparatus (AREA)
Description
第１図乃至第３図は、本考案の第１実施例を示
す図であり、第１図はパイロツト噴射装置の全体
構成を表す断面図、第２図は第１図のパイロツト
噴射装置の要部拡大断面図、第３図はパイロツト
噴射装置が取り付けられる燃料噴射ポンプの構成
を表す断面図、第４図は第２実施例のパイロツト
噴射装置の要部拡大断面図、第５図は第３実施例
のパイロツト噴射装置の要部拡大断面図である。
１……燃料噴射ポンプ、１１……ポンプハウジ
ング（低圧燃料室）、１７……加圧室、２０……
パイロツト噴射装置、４１……アキユームレート
ピストン、４２……シリンダ、５１……アキユー
ムレート室、５４……リターンスプリング（付勢
部材）、６４……第１の減圧燃料通路、６５……
第２の減圧燃料通路。
1 to 3 are diagrams showing a first embodiment of the present invention, in which FIG. 1 is a cross-sectional view showing the overall configuration of the pilot injection device, and FIG. 2 is a main part of the pilot injection device shown in FIG. 3 is a sectional view showing the configuration of a fuel injection pump to which a pilot injection device is attached. FIG. 4 is an enlarged sectional view of a main part of the pilot injection device of the second embodiment. FIG. FIG. 2 is an enlarged sectional view of a main part of a pilot injection device according to an embodiment. 1... Fuel injection pump, 11... Pump housing (low pressure fuel chamber), 17... Pressurization chamber, 20...
Pilot injection device, 41... Accumulation rate piston, 42... Cylinder, 51... Accumulation rate chamber, 54... Return spring (biasing member), 64... First reduced pressure fuel passage, 65...
A second reduced pressure fuel passage.
Claims (1)
形成されたシリンダと、 前記加圧室との連通部近傍のシリンダ内へ設け
たアキユームレート室と、 前記シリンダと摺動自在に嵌合し、前記加圧室
の方向へ付勢する付勢部材によつて、前記加圧室
と前記アキユームレート室との連通を遮断すると
ともに、前記加圧室の燃料圧力上昇に伴い前記付
勢部材に抗して移動し、前記加圧室と前記アキユ
ームレート室とを連通をするアキユームレートピ
ストンと、 を備えた燃料噴射ポンプのパイロツト噴射装置
において、 前記アキユームレートピストンに前記低圧燃料
室と連通する第１の減圧燃料通路を設けるととも
に、 前記シリンダに、前記アキユームレートピス
トンが前記加圧室とアキユームレート室との連通
を遮断する位置において前記第１の減圧燃料通路
を前記アキユームレート室へ連通する第２の減圧
燃料通路を設けたことを特徴とする燃料噴射ポン
プのパイロツト噴射装置。[Scope of Claim for Utility Model Registration] A cylinder formed between a pressurizing chamber and a fuel low pressure chamber of a fuel injection pump, an accumulation chamber provided in the cylinder near a communication portion with the pressurizing chamber, A biasing member that is slidably fitted to the cylinder and biases toward the pressurizing chamber blocks communication between the pressurizing chamber and the accumulation chamber, and also blocks the communication between the pressurizing chamber and the accumulation chamber. A pilot injection device for a fuel injection pump, comprising: an accumulation rate piston that moves against the urging member as the fuel pressure increases, and communicates the pressurizing chamber with the accumulation chamber; The accumulation rate piston is provided with a first reduced pressure fuel passage communicating with the low pressure fuel chamber, and the accumulation rate piston is provided in the cylinder at a position where the accumulation rate piston blocks communication between the pressurization chamber and the accumulation chamber. A pilot injection device for a fuel injection pump, characterized in that a second reduced pressure fuel passage is provided that communicates the first reduced pressure fuel passage with the accumulation chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989032447U JP2506746Y2 (en) | 1989-03-22 | 1989-03-22 | Pilot injection device for fuel injection pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989032447U JP2506746Y2 (en) | 1989-03-22 | 1989-03-22 | Pilot injection device for fuel injection pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02124260U true JPH02124260U (en) | 1990-10-12 |
| JP2506746Y2 JP2506746Y2 (en) | 1996-08-14 |
Family
ID=31535431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989032447U Expired - Lifetime JP2506746Y2 (en) | 1989-03-22 | 1989-03-22 | Pilot injection device for fuel injection pump |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2506746Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0180662U (en) * | 1987-11-18 | 1989-05-30 |
-
1989
- 1989-03-22 JP JP1989032447U patent/JP2506746Y2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0180662U (en) * | 1987-11-18 | 1989-05-30 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2506746Y2 (en) | 1996-08-14 |