JPH0414765U - - Google Patents
Info
- Publication number
- JPH0414765U JPH0414765U JP5577990U JP5577990U JPH0414765U JP H0414765 U JPH0414765 U JP H0414765U JP 5577990 U JP5577990 U JP 5577990U JP 5577990 U JP5577990 U JP 5577990U JP H0414765 U JPH0414765 U JP H0414765U
- Authority
- JP
- Japan
- Prior art keywords
- fuel pressure
- fuel
- diaphragm
- outlet
- 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.)
- Pending
Links
- 239000000446 fuel Substances 0.000 claims description 23
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000011144 upstream manufacturing Methods 0.000 description 1
Landscapes
- Fuel-Injection Apparatus (AREA)
Description
第１図は本考案による燃料噴射装置の一実施例
を示す要部断面図、第２図は先行技術による燃料
噴射装置の概略断面図、第３図は第一燃圧レギユ
レータにおけるインテークマニホールド圧力と燃
圧Ｐ１との関係を示す図、第４図はエンジン回転
数に応じたパルス信号の周期を示す図、第５図は
インテークマニホールド圧力とエンジン回転数に
応じた調整燃圧Ｐ４を示す図、第６図は調整燃圧
Ｐ４と上流室の燃圧Ｐ５との関係を示す図、第７
図は差圧Ｐ１−Ｐ５と各燃料流量との関係を示す
図である。
７……リノターン通路、２４……第三燃圧レギ
ユレータ、２５……第一燃圧室、２６……第二燃
圧室、２６ａ……出口、２７……ダイアフラム、
２８……第一スプリング、２９……第二スプリン
グ、３１……燃料噴射弁、４５……プツシユプレ
ート、４５ａ……プツシユプ部、４６……閉止部
材。
Fig. 1 is a sectional view of essential parts showing an embodiment of a fuel injection device according to the present invention, Fig. 2 is a schematic sectional view of a fuel injection device according to the prior art, and Fig. 3 is an intake manifold pressure and fuel pressure in the first fuel pressure regulator. FIG . 4 is a diagram showing the period of the pulse signal according to the engine speed. FIG. 5 is a diagram showing the adjusted fuel pressure P4 according to the intake manifold pressure and the engine speed. Figure 6 is a diagram showing the relationship between the adjusted fuel pressure P4 and the fuel pressure P5 in the upstream chamber.
The figure is a diagram showing the relationship between the differential pressure P 1 -P 5 and each fuel flow rate. 7... Reno turn passage, 24... Third fuel pressure regulator, 25... First fuel pressure chamber, 26... Second fuel pressure chamber, 26a... Outlet, 27... Diaphragm,
28...First spring, 29...Second spring, 31...Fuel injection valve, 45...Pushing plate, 45a...Pushing portion, 46...Closing member.
Claims (1)
に応じた燃圧が印加される第一燃圧室と、該燃圧
がそれより低い調整燃圧に変換され且つリターン
通路に連通する出口を有する第二燃圧室とがダイ
アフラムに仕切られ、該ダイアフラムにかかる第
一及び第二スプリングの差の荷重によりバランス
する燃圧レギユレータと、 前記調整燃圧に基づいて燃料噴射量が制御され
る燃料噴射弁と、を備えた燃料噴射装置において
、 前記第二スプリングの荷重をダイアフラムに作
用せしめる制御バルブが前記出口に対して進退可
能にリターン通路内に配置されていて、エンジン
停止時に該制御バルブが出口を閉鎖させるように
したことを特徴とする圧力保持機構。[Claims for Utility Model Registration] A first fuel pressure chamber to which fuel pressure corresponding to intake manifold pressure and engine speed is applied, and a second fuel pressure chamber having an outlet where the fuel pressure is converted to a lower adjusted fuel pressure and communicating with a return passage. a fuel pressure regulator in which two fuel pressure chambers are partitioned by a diaphragm and balanced by a differential load between a first and second spring applied to the diaphragm; and a fuel injection valve in which a fuel injection amount is controlled based on the adjusted fuel pressure. In the fuel injection device, a control valve that applies the load of the second spring to the diaphragm is disposed in the return passage so as to be movable toward and away from the outlet, and the control valve closes the outlet when the engine is stopped. A pressure holding mechanism characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5577990U JPH0414765U (en) | 1990-05-28 | 1990-05-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5577990U JPH0414765U (en) | 1990-05-28 | 1990-05-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0414765U true JPH0414765U (en) | 1992-02-06 |
Family
ID=31579035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5577990U Pending JPH0414765U (en) | 1990-05-28 | 1990-05-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0414765U (en) |
-
1990
- 1990-05-28 JP JP5577990U patent/JPH0414765U/ja active Pending