JPH0212062U - - Google Patents
Info
- Publication number
- JPH0212062U JPH0212062U JP8975588U JP8975588U JPH0212062U JP H0212062 U JPH0212062 U JP H0212062U JP 8975588 U JP8975588 U JP 8975588U JP 8975588 U JP8975588 U JP 8975588U JP H0212062 U JPH0212062 U JP H0212062U
- Authority
- JP
- Japan
- Prior art keywords
- accumulation rate
- fuel
- rate piston
- piston guide
- back pressure
- 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 12
- 238000009825 accumulation Methods 0.000 claims description 10
- 238000002347 injection Methods 0.000 claims description 10
- 239000007924 injection Substances 0.000 claims description 10
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Fuel-Injection Apparatus (AREA)
Description
第１図は本考案一実施例のパイロツト噴射装置
の断面図、第２図は同じくそのパイロツト噴射装
置を備えた燃料噴射ポンプの概略構成図、第３図
は同じくそのアキユームレートピストンに働く作
用力を示す説明図、第４図は燃料粘度と燃料温度
との関係を示すグラフ、第５図は本考案一実施例
の主要部断面図、第６図は同じくそのパイロツト
噴射装置の諸量と燃料温度との関係を示すグラフ
である。
１…燃料噴射ポンプ、１０…プランジヤ室、２
０…パイロツト噴射装置、５１…アキユームレー
トピストン、５２…アキユームレートピストンガ
イド、６１…油溜り、６３…背圧室、６５…リタ
ーンスプリング。
Fig. 1 is a sectional view of a pilot injection device according to an embodiment of the present invention, Fig. 2 is a schematic diagram of a fuel injection pump equipped with the same pilot injection device, and Fig. 3 is a diagram showing the action acting on the accumulation piston. FIG. 4 is a graph showing the relationship between fuel viscosity and fuel temperature. FIG. It is a graph showing the relationship with fuel temperature. 1...Fuel injection pump, 10...Plunger chamber, 2
0...Pilot injection device, 51...Accumulation rate piston, 52...Accumulation rate piston guide, 61...Oil reservoir, 63...Back pressure chamber, 65...Return spring.
Claims (1)
に燃料充填部を有するアキユームレートピストン
ガイドと、 該アキユームレートピストンガイドと摺動自在
に嵌合し、上記加圧室内の燃料圧力上昇に伴い、
上記アキユームレートピストンガイド内部を押圧
移動するアキユームレートピストンと、 上記アキユームレートピストンガイドに連通す
る背圧室に内設され、上記アキユームレートピス
トンの頭部側面を上記燃料充填部に近接対向させ
る方向の付勢力を発生する付勢部材と、 を具備した燃料噴射ポンプのパイロツト噴射装
置において、 上記アキユームレートピストンガイドと上記ア
キユームレートピストンとの嵌合部に、上記燃料
充填部と上記背圧室側との間で所定量の燃料が流
動可能な所定間隙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] An accumulation rate piston guide that communicates with a pressurizing chamber of a fuel injection pump and has a fuel filling section near the communication section; and an accumulation rate piston guide that is slidably fitted into the accumulation rate piston guide; With the increase in fuel pressure in the pressurized chamber,
An accumulation rate piston that presses and moves inside the accumulation rate piston guide; and a back pressure chamber that communicates with the accumulation rate piston guide, and a side surface of the head of the accumulation rate piston close to the fuel filling section. A pilot injection device for a fuel injection pump, comprising: a biasing member that generates biasing forces in opposing directions; A pilot injection device for a fuel injection pump, characterized in that a predetermined gap is provided between the back pressure chamber and the back pressure chamber to allow a predetermined amount of fuel to flow.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8975588U JPH0634606Y2 (en) | 1988-07-05 | 1988-07-05 | Pilot injection device for fuel injection pump |
| US07/371,225 US5033443A (en) | 1988-06-27 | 1989-06-26 | Pilot injection device for fuel injection pump |
| EP19890111610 EP0348865A3 (en) | 1988-06-27 | 1989-06-26 | Pilot injection device for fuel injection pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8975588U JPH0634606Y2 (en) | 1988-07-05 | 1988-07-05 | Pilot injection device for fuel injection pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0212062U true JPH0212062U (en) | 1990-01-25 |
| JPH0634606Y2 JPH0634606Y2 (en) | 1994-09-07 |
Family
ID=31314296
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8975588U Expired - Lifetime JPH0634606Y2 (en) | 1988-06-27 | 1988-07-05 | Pilot injection device for fuel injection pump |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0634606Y2 (en) |
-
1988
- 1988-07-05 JP JP8975588U patent/JPH0634606Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0634606Y2 (en) | 1994-09-07 |