JPH0482367U - - Google Patents
Info
- Publication number
- JPH0482367U JPH0482367U JP12575290U JP12575290U JPH0482367U JP H0482367 U JPH0482367 U JP H0482367U JP 12575290 U JP12575290 U JP 12575290U JP 12575290 U JP12575290 U JP 12575290U JP H0482367 U JPH0482367 U JP H0482367U
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- chamber
- pressure
- fuel pressure
- main passage
- 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 25
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 230000002265 prevention Effects 0.000 claims description 4
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- 238000002485 combustion reaction Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 6
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図はエンジン停止状態の吐出防止
弁を示す要部断面図、第３図は先行技術における
燃料噴射装置の概略図、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Ｐｍ及びエンジン回転
数と調整燃圧Ｐ４との関係を示す図、第６図は差
圧Ｐ１−Ｐ５と各燃料流量との関係を示す図であ
る。
１……燃料ポンプ、１４……第三燃圧レギユレ
ータ、１５……第一燃圧室、１６……第二燃圧室
、１７……ダイアフラム、２０……燃料噴射弁、
２１……計量ジエツト、２２……上流室、２２ａ
……吐出口、２３……下流室、２４……ダイアフ
ラム、２５……差圧ジエツト、２６……バルブ、
２９……主通路、３０……バイパス通路、３１…
…吐出防止弁。
FIG. 1 is a schematic diagram of an embodiment of the fuel injection device according to the present invention, FIG. 2 is a cross-sectional view of the main part showing the discharge prevention valve when the engine is stopped, and FIG. 3 is a schematic diagram of the fuel injection device in the prior art. Figure 4 is a diagram showing the period of the pulse signal depending on the engine speed, Figure 5 is a diagram showing the relationship between the intake manifold pressure Pm , the engine speed, and the adjusted fuel pressure P4 , and Figure 6 is a diagram showing the differential pressure P4. FIG. 1 is a diagram showing the relationship between 1 - P5 and each fuel flow rate. DESCRIPTION OF SYMBOLS 1... Fuel pump, 14... Third fuel pressure regulator, 15... First fuel pressure chamber, 16... Second fuel pressure chamber, 17... Diaphragm, 20... Fuel injection valve,
21...Measuring jet, 22...Upstream chamber, 22a
...Discharge port, 23...Downstream chamber, 24...Diaphragm, 25...Differential pressure jet, 26...Valve,
29...Main passage, 30...Bypass passage, 31...
...Discharge prevention valve.
Claims (1)
ークマニホールド圧力及びエンジン回転数に応じ
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
して主通路の燃料が供給され且つ燃料の吐出口を
有す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に連通する下流室とがダ
イアフラムで仕切られた燃料噴射弁とが備えられ
た燃料噴射装置において、 前記燃料ポンプと第二燃圧室を連通するバイパ
ス通路と、該バイパス通路の燃圧の変化に従つて
前記燃料ポンプに対して主通路とバイパス通路と
を択一的に開閉切換えする吐出防止弁とが備えら
れたことを特徴とする初期吐出防止機構。[Claim for Utility Model Registration] A main passage for feeding fuel to the fuel pump, a first fuel pressure chamber to which fuel pressure corresponding to intake manifold pressure and engine speed is applied, and a first fuel pressure chamber to which the fuel pressure is converted to adjusted fuel pressure. A fuel pressure regulator having two combustion pressure chambers separated by a diaphragm, an upstream chamber to which fuel is supplied from the main passage through a metering jet and has a fuel discharge port, and an upstream chamber to which the adjusted fuel pressure is applied and which is connected to the upstream chamber through a differential pressure jet. In a fuel injection device equipped with a fuel injection valve in which a downstream chamber communicating with a combustion chamber is partitioned off by a diaphragm, a bypass passage communicating the fuel pump and a second fuel pressure chamber, and An initial discharge prevention mechanism characterized in that the fuel pump is provided with a discharge prevention valve that selectively opens and closes a main passage and a bypass passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12575290U JPH0482367U (en) | 1990-11-28 | 1990-11-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12575290U JPH0482367U (en) | 1990-11-28 | 1990-11-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0482367U true JPH0482367U (en) | 1992-07-17 |
Family
ID=31873338
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12575290U Pending JPH0482367U (en) | 1990-11-28 | 1990-11-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0482367U (en) |
-
1990
- 1990-11-28 JP JP12575290U patent/JPH0482367U/ja active Pending