JPH0482364U - - Google Patents
Info
- Publication number
- JPH0482364U JPH0482364U JP12470690U JP12470690U JPH0482364U JP H0482364 U JPH0482364 U JP H0482364U JP 12470690 U JP12470690 U JP 12470690U JP 12470690 U JP12470690 U JP 12470690U JP H0482364 U JPH0482364 U JP H0482364U
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- fuel pressure
- chamber
- pressure
- diaphragm
- 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 26
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims 2
- 238000002485 combustion reaction Methods 0.000 claims 1
- 230000002265 prevention Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
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
の概略図、第２図は先行技術における燃料噴射装
置の概略図、第３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４図はインテークマ
ニホールド圧力Ｐｍ及びエンジン回転数と調整燃
圧との関係を示す図、第５図は差圧Ｐ１−Ｐ５と
各燃料流量との関係を示す図である。
２……第一燃圧レギユレータ、１４……第三燃
圧レギユレータ、１５……第一燃圧室、１６……
第二燃圧室、１７，２４……ダイアフラム、２０
……燃料噴射弁、２１……計量ジエツト、２２…
…上流室、２３……下流室、２５……差圧ジエツ
ト、２６，３１……バルブ、２９……バイパス通
路、３０……開口、３３……リターンジエツト。
FIG. 1 is a schematic diagram of an embodiment of a fuel injection device according to the present invention, FIG. 2 is a schematic diagram of a fuel injection device in the prior art, and FIG. 3 is a diagram showing the period of a pulse signal depending on the engine rotation speed. FIG. 4 is a diagram showing the relationship between intake manifold pressure Pm , engine speed, and adjusted fuel pressure, and FIG. 5 is a diagram showing the relationship between differential pressure P1 - P5 and each fuel flow rate. 2...First fuel pressure regulator, 14...Third fuel pressure regulator, 15...First fuel pressure chamber, 16...
Second fuel pressure chamber, 17, 24... diaphragm, 20
... Fuel injection valve, 21 ... Metering jet, 22 ...
...Upstream chamber, 23...Downstream chamber, 25...Differential pressure jet, 26, 31...Valve, 29...Bypass passage, 30...Opening, 33...Return jet.
Claims (1)
に応じた燃圧が印加される第一燃圧室と、該燃圧
が調整燃圧に変換される第二燃圧室とがダイアフ
ラムで仕切られた燃圧レギユレータと、 計量ジエツトを介してインテークマニホールド
圧力に応じた燃圧の燃料が導入される上流室と、
前記調整燃圧が印加され且つ差圧ジエツトを介し
て上流室と連通する下流室とがダイアフラムで仕
切られ、且つ該ダイヤフラムの変位に連動する噴
射バルブによつて上流室から燃料を吐出させる燃
料噴射弁とが備えられた燃料噴射装置において、 燃料を第二燃圧室へ供給し得るバイパス通路と
、前記燃圧レギユレータのダイアフラムの変位に
連動してバイパス通路と第二燃圧室との接続開口
を開閉し得るバルブと、該第二燃圧室と燃料リタ
ーン用通路とを連通するリターンジエツトとが備
えられたことを特徴とする初期吐出防止機構。[Scope of Claim for Utility Model Registration] A fuel pressure chamber in which a first fuel pressure chamber to which a fuel pressure corresponding to the intake manifold pressure and engine speed is applied and a second fuel pressure chamber to which the fuel pressure is converted to an adjusted fuel pressure are separated by a diaphragm. a regulator; an upstream chamber into which fuel is introduced at a fuel pressure depending on the intake manifold pressure via a metering jet;
A fuel injection valve in which a downstream chamber to which the adjusted fuel pressure is applied and which communicates with the upstream chamber via a differential pressure jet is partitioned off by a diaphragm, and in which fuel is discharged from the upstream chamber by an injection valve linked to displacement of the diaphragm. In a fuel injection device, a bypass passage capable of supplying fuel to a second fuel pressure chamber, and a connecting opening between the bypass passage and the second combustion pressure chamber can be opened and closed in conjunction with displacement of a diaphragm of the fuel pressure regulator. An initial discharge prevention mechanism comprising: a valve; and a return jet that communicates the second fuel pressure chamber with a fuel return passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12470690U JPH0482364U (en) | 1990-11-27 | 1990-11-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12470690U JPH0482364U (en) | 1990-11-27 | 1990-11-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0482364U true JPH0482364U (en) | 1992-07-17 |
Family
ID=31872342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12470690U Pending JPH0482364U (en) | 1990-11-27 | 1990-11-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0482364U (en) |
-
1990
- 1990-11-27 JP JP12470690U patent/JPH0482364U/ja active Pending