JPH0395068U - - Google Patents
Info
- Publication number
- JPH0395068U JPH0395068U JP425790U JP425790U JPH0395068U JP H0395068 U JPH0395068 U JP H0395068U JP 425790 U JP425790 U JP 425790U JP 425790 U JP425790 U JP 425790U JP H0395068 U JPH0395068 U JP H0395068U
- Authority
- JP
- Japan
- Prior art keywords
- solenoid
- fuel
- check valve
- engine
- 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 11
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Landscapes
- Fuel-Injection Apparatus (AREA)
Description
第１図は本考案実施例による燃料噴射装置の主
要部の構成を示す模式図、第２図は第１図に示し
た主要部の特性を説明するための線図、第３図は
第１図に示した主要部の変形例を示す模式図、第
４図は従来の燃料噴射装置の全体構成を示す断面
図である。
１……燃料噴射装置、１Ａ……ノズル本体、１
Ｂ……開弁圧室、１Ｃ……プランジヤ室に連続す
る加圧室、２……燃料通路、２Ａ……燃料通路の
一方、２Ｂ……燃料通路の他方、４……第１逆止
弁、５……加圧設定リターンスプリング、６……
ソレノイド、７……制御部、Ｂ２……開弁圧室、
Ｄ……針弁。
FIG. 1 is a schematic diagram showing the configuration of the main parts of the fuel injection device according to the embodiment of the present invention, FIG. 2 is a diagram for explaining the characteristics of the main parts shown in FIG. 1, and FIG. FIG. 4 is a schematic diagram showing a modification of the main parts shown in the figure, and FIG. 4 is a sectional view showing the overall configuration of a conventional fuel injection device. 1...Fuel injection device, 1A...Nozzle body, 1
B... Valve opening pressure chamber, 1C... Pressurizing chamber continuous to the plunger chamber, 2... Fuel passage, 2A... One side of the fuel passage, 2B... Other side of the fuel passage, 4... First check valve , 5... Pressure setting return spring, 6...
Solenoid, 7...control unit, B2...valve opening pressure chamber,
D...Needle valve.
Claims (1)
で分流し、一方をリターンスプリングにより開弁
圧を設定されている針弁の開弁圧室に、そして他
方をこの分岐通路の他方よりも大きい断面積を有
するパイロツト噴射用プランジヤ室に導入する燃
料通路と、 上記プランジヤ室側において摺動可能に挿嵌さ
れ、通常時には、加圧設定用リターンスプリング
により上記燃料通路の他方との接続部を閉じる習
性を付与されている逆止弁と、 上記逆止弁のロツドに設けてある磁性体に対向
して配置されてこの逆止弁をその付勢に抗して摺
動駆動するソレノイドと、 上記ソレノイドの駆動部を出力側に接続され、
入力側には少なくとも、エンジン回転数センサお
よび噴射ポンプ側のコントロールラツクの位置セ
ンサが接続してある制御部とを備え、 上記制御部は、エンジンのアイドル回転時を含
む低回転時には、一旦、上記逆止弁を開放する向
きに上記ソレノイドの励磁を行なつて上記加圧室
内の圧力を高めた後に上記ソレノイドの励磁を解
除することを特徴とする燃料噴射装置。[Scope of Claim for Utility Model Registration] Fuel that is pressure-fed from a fuel injection pump is divided in the middle, one part is sent to the opening pressure chamber of a needle valve whose opening pressure is set by a return spring, and the other part is sent to this branch. A fuel passage leading to the pilot injection plunger chamber has a larger cross-sectional area than the other passage, and the other side of the fuel passage is slidably fitted on the plunger chamber side, and is normally operated by a pressurization setting return spring. A check valve that has a tendency to close the connection with the check valve; The driving solenoid and the driving part of the above solenoid are connected to the output side,
The input side is equipped with a control section to which at least an engine rotation speed sensor and a position sensor of a control rack on the injection pump side are connected, and the control section is configured to temporarily control the speed of the engine during low engine speeds, including when the engine is idling. A fuel injection device characterized in that the solenoid is energized in a direction to open a check valve to increase the pressure in the pressurizing chamber, and then the solenoid is de-energized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP425790U JPH0395068U (en) | 1990-01-19 | 1990-01-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP425790U JPH0395068U (en) | 1990-01-19 | 1990-01-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0395068U true JPH0395068U (en) | 1991-09-27 |
Family
ID=31508010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP425790U Pending JPH0395068U (en) | 1990-01-19 | 1990-01-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0395068U (en) |
-
1990
- 1990-01-19 JP JP425790U patent/JPH0395068U/ja active Pending
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