JPH0359469U - - Google Patents
Info
- Publication number
- JPH0359469U JPH0359469U JP12054289U JP12054289U JPH0359469U JP H0359469 U JPH0359469 U JP H0359469U JP 12054289 U JP12054289 U JP 12054289U JP 12054289 U JP12054289 U JP 12054289U JP H0359469 U JPH0359469 U JP H0359469U
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- fuel
- nozzle
- fuel injection
- introduction port
- 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 11
- 239000007924 injection Substances 0.000 claims description 11
- 238000013016 damping Methods 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
Landscapes
- Fuel-Injection Apparatus (AREA)
Description
第１図は本考案の一実施例による燃料噴射弁４
０および燃料噴射ポンプ１５の縦断面図、第２図
は同、燃料噴射ポンプ１５部分の拡大図、第３図
は従来の燃料噴射弁１の縦断面図である。
１……可変開弁圧型の燃料噴射弁、２……ノズ
ルホルダヘツド（インレツト側のノズルホルダボ
デイ）、３……シリンダ、４……ノズルホルダ本
体（ノズル側のノズルホルダボデイ）、５……デ
イスタンスピース、６……ニードル弁、７……ノ
ズルボデイ、８……締付けナツト、９……ノズル
ホルダ、１０……リテーニングナツト、１１……
燃料入口、１２……圧力導入口、１３……リーク
燃料出口、１４……インレツトコネクタ、１５…
…燃料噴射ポンプ、１６……デリバリバルブホル
ダ、１７……噴射管、１８……ポンプ室圧インレ
ツトコネクタ、１９……リークアダプタ、２０…
…リークパイプ、２１……燃料タンク、２２……
燃料通路、２３……圧力通路、２４……リーク燃
料通路、２５……フラツトダンピング機構、２６
……燃料通路、２７……シリンダ室、２８……リ
ーク燃料通路、２９……ダンパピストン、３０…
…燃料通路、３１……セントラルプランジヤ、３
２……ガイド孔、３３……リーク燃料通路、３４
…スプリング室、３５……プレツシヤスプリング
、３６……プレツシヤピン、３７，３８……燃料
通路、３９……噴口、４０……可変開弁圧型の燃
料噴射弁、４１……圧力導入管、４２……アウト
レツトコネクタ、４３……第二プランジヤ室（予
備圧送室）、４４……ポンプハウジング、４５…
…プランジヤバレル、４６……プランジヤ、４７
……ヘツドプラグ、４８……第一プランジヤ室、
４９……ダンパ圧力制御弁、５０……予備圧送燃
料吸込み用逆止弁、５１……吸入スリツト、５２
……センター孔、５３……分配スリツト（吐出ス
リツト）、５４……カツトオフポート、５５……
均圧スリツト、５６……環状溝、５７……分配ポ
ート、５８……分配通路、５９……アウトレツト
コネクタ、６０……ダンパ圧ポート、６１……ダ
ンパ圧通路、６２……コントロールスリーブ、６
３……カムローラ、６４……カムプレート、６５
……高圧燃料室（ポンプ室）、Ｐｔ……高圧燃料
室内の圧力、Ｐｐ……第二プランジヤ室４３内
の圧力、Ｌ……最大リフト量。
FIG. 1 shows a fuel injection valve 4 according to an embodiment of the present invention.
2 is an enlarged view of the fuel injection pump 15 portion, and FIG. 3 is a longitudinal sectional view of the conventional fuel injection valve 1. 1... Variable valve opening pressure type fuel injection valve, 2... Nozzle holder head (nozzle holder body on the inlet side), 3... Cylinder, 4... Nozzle holder body (nozzle holder body on the nozzle side), 5... Distance piece, 6... Needle valve, 7... Nozzle body, 8... Tightening nut, 9... Nozzle holder, 10... Retaining nut, 11...
Fuel inlet, 12... Pressure introduction port, 13... Leak fuel outlet, 14... Inlet connector, 15...
... Fuel injection pump, 16 ... Delivery valve holder, 17 ... Injection pipe, 18 ... Pump chamber pressure inlet connector, 19 ... Leak adapter, 20 ...
...Leak pipe, 21...Fuel tank, 22...
Fuel passage, 23... Pressure passage, 24... Leak fuel passage, 25... Flat damping mechanism, 26
...Fuel passage, 27...Cylinder chamber, 28...Leak fuel passage, 29...Damper piston, 30...
...Fuel passage, 31...Central plunger, 3
2... Guide hole, 33... Leak fuel passage, 34
... Spring chamber, 35 ... Pressure spring, 36 ... Pressure pin, 37, 38 ... Fuel passage, 39 ... Nozzle port, 40 ... Variable valve opening pressure type fuel injection valve, 41 ... Pressure introduction pipe, 42 ...Outlet connector, 43...Second plunger chamber (preliminary pressure feeding chamber), 44...Pump housing, 45...
...Plunger barrel, 46...Plunger, 47
... Head plug, 48 ... First plunger chamber,
49... Damper pressure control valve, 50... Pre-pressurized fuel suction check valve, 51... Suction slit, 52
... Center hole, 53 ... Distribution slit (discharge slit), 54 ... Cut-off port, 55 ...
Equalizing pressure slit, 56... Annular groove, 57... Distribution port, 58... Distribution passage, 59... Outlet connector, 60... Damper pressure port, 61... Damper pressure passage, 62... Control sleeve, 6
3...Cam roller, 64...Cam plate, 65
...High pressure fuel chamber (pump chamber), Pt...Pressure in the high pressure fuel chamber, Pp...Pressure in the second plunger chamber 43, L...Maximum lift amount.
Claims (1)
入口、および圧力を導入する圧力導入口を有する
ノズルホルダと、 このノズルホルダにより支持するとともに、前
記燃料入口に連通する燃料の噴口を有するノズル
ボデイと、 このノズルボデイに摺動可能に収納しプレツシ
ヤスプリングにより前記噴口を閉じる方向に付勢
したニードル弁と、 このニードル弁と一体的に摺動可能なセントラ
ルプランジヤとを有し、 このセントラルプランジヤに前記圧力導入口を
介して高圧の圧力を作用させることとした燃料噴
射弁であつて、 前記圧力導入口に導入する高圧の圧力源として
、前記燃料噴射ポンプに形成した予備圧送室の圧
力を利用したことを特徴とする燃料噴射弁。[Claims for Utility Model Registration] A nozzle holder having a fuel inlet for introducing high-pressure fuel from a fuel injection pump and a pressure introduction port for introducing pressure; and a fuel supported by the nozzle holder and communicating with the fuel inlet. A nozzle body having a nozzle nozzle, a needle valve slidably housed in the nozzle body and biased in a direction to close the nozzle by a pressure spring, and a central plunger slidable integrally with the needle valve. The fuel injection valve is configured to apply high pressure to the central plunger through the pressure introduction port, and a reserve formed in the fuel injection pump serves as a high pressure source introduced to the pressure introduction port. A fuel injection valve characterized by utilizing pressure in a pressure feeding chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12054289U JPH0359469U (en) | 1989-10-17 | 1989-10-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12054289U JPH0359469U (en) | 1989-10-17 | 1989-10-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0359469U true JPH0359469U (en) | 1991-06-12 |
Family
ID=31668615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12054289U Pending JPH0359469U (en) | 1989-10-17 | 1989-10-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0359469U (en) |
-
1989
- 1989-10-17 JP JP12054289U patent/JPH0359469U/ja active Pending
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